International Markets Essay Example for Free

International Markets Essay Once SAB Miller has decided to establish itself in the global market, it becomes necessary for the marketing manager to study and analyze the various options available to enter the international markets and select the most suitable one. The selection of the entry mode is one of the most significant decisions.SAB Miller takes in the process of internationalization, as it involves commitment of resources with long-term financial and structural implications. Mode of entry may be defined as an institutional mechanism by which a firm makes its products or services available to consumer in international markets. Root (1994) defines the market entry for international markets as a comprehensive plan which sets forth the objectives,goals,resources,and policies that guide a company’s international business operations over a future period long enough to achieve sustainable growth in world markets. FACTORS AFFECTING THE SELECTION OF ENTRY MODE EXTERNAL MODES MARKET SIZE:Market size is one of the key factors an international marketer has to develop to keep in mind when selecting an entry strategy.Countries with a large market size justify the modes of entry with investment,such as wholly owned subsiaries or equity participation. MARKET GROWTH:Most of the large,established markets,such US,Europe and Japan,have more or less reached a point of saturation for consumer goods such as automobiles,consumer electronics.Therefore,the growth of markets in these countries is showing a declining trend.For instance,the overall growth in most of the US and European market is about 7% while emerging markets like India and China is over 30% which indicates tremendous market potential in time to come. Therefore,from the perspective of long-term growth potential such as China,India,Thailand,Indonesia etc.These markets are also termed emerging markets. GOVERNMENT REGULATIONS:The selection of market entry modes to a great extent affected by the legislative framework of the overseas market,the government of most of the Gulf countries have made it mandatory for foreign firms to have local partner.For instance,the UAE is a lucrative market for Indian firms but most firms operate there with a local partner. Trade barriers such as ecological regulations and local content requirements also affect the mode of entry.It has been a major reason for  increased foreign investment in Mexico,which is a part of the North American Free Agreement(NAFTA),in order to cater to the US market. LEVEL OF COMPETITION:Presence of competitors and their level of involvement in an overseas market is another crucial factor in deciding on an entry mode so as to effectively respond to competitive market force.This is one of the major reasons behind auto companies setting up their operations in India and other emerging markets so as to effectively respond to global competition. INTERNAL MODES COMPANY OBJECTIVES:Companies operating in domestic markets with limited aspirations generally enter foreign markets as a result of a reactive approach to international marketing oppurtunities.In such cases,companies receive unsoliated orders from acquaintances,firms and relatives based abroad,and they attempt to fulfil these export orders.This casual approach to entering international markets by way of producing in the homemarket and exporting overseas translates into regular exporting if the firm has positive experience in its exports operation. AVAILABILTY OF COMPANY RESOURCES:Venturing into international markts needs substantial commitment of financial and human resources and therefore choice of an entry mode depends upon the financial strength of a firm.It may be observed that Indian firms with good financial strength have entered international markets by way of wholly owned subsidiaries or equity participation. LEVEL OF COMMITMENT:In view of the market potential,the willingness of the company to commit resources in a particular market also determines the entry mode choice.Companies need to evaluate various investment alternatives in a particular market also depends upon the way the company is willing to perceive and respond to competitive forces. INTERNATIONAL EXPERIENCE:A company well exposed to the dynamics of the international marketing environment would be at ease when making a decision regarding entering into international markets with a highly intensive mode of entry such as joint venture and wholly owned subsidiaries. Below are different modes of market entry and they include: EXPORTING Exporting is the simplest method of entering a foreign market.It is the  process of sending goods or services from country to other countries for use or sale there. By exporting to a foreign country,a company is able to enter this country without actually establishing itself in the country.The company must simply manufacture products that can be shipped to the foreign country.Export activities may take several forms,including indirect exporting,direct exporting,and intracorporate transfers. Direct exports represent the most basic mode of exporting, capitalizing on economies of scale in production concentrated in the home country and affording better control over distribution. Direct export works the best if the volumes are small. Types of direct exporting are: Sales representatives that represent foreign suppliers/manufacturers in their local markets for an established commission on sales. Provide support services to a manufacturer regarding local advertising, local sales presentations, customs clearance formalities, legal requirements. Importing distributors purchase product in their own right and resell it in their local markets to wholesalers, retailers, or both. Indirect Exporting Indirect export is the process of exporting through domestically based export intermediaries. Indirect methods of exporting requires less marketing investment, but, as the exporter has no control over its products in the foreign market, the company lose substantial control over the marketing process. Types or methods of indirect exporting are: Filling orders from domestic buyers who then export the product Seeking out domestic buyers who represent foreign customers Exporting through an Export Management Company (EMC) Exporting through an Export Trading Company (ETC) INTRACORPORATE TRANSFERS A third form of export activity is the intracorporate transfer,which has become more important as the sizes of MNCs have increased.An intracorporate transfer is the sale of goods by a firm in one country to an affiliated firm in another. LICENCING License is a contract to identify what is being licensed: trademarks, patents, designs, copyrights or software. Licensing allows rapidly entering into the chosen foreign market and reduces capital requirements to establish manufacturing facilities overseas. Your contract does not violation of the host countrys existing laws and regulations.a licensor in the home country makes limited rights or resources available to the licensee in the host country. The rights or resources may include patents, trademarks, managerial skills, technology, and others that can make it possible for the licensee to manufacture and sell in the host country a similar product to the one the licensor has already been producing and selling in the home country without requiring the licensor to open a new operation overseas. The licensor earnings usually take forms of one time payments, technical fees and royalty payments usually calculated as a percentage of sales. As in this mode of entry the transference of knowledge between the parental company and the licensee is strongly present, the decision of making an international license agreement depend on the respect the host government show for intellectual property and on the ability of the licensor to choose the right partners and avoid them to compete in each other market. Licensing is a relatively flexible work agreement that can be customized to fit the needs and interests of both, licensor and licensee. Franchising The franchising system can be defined as: â€Å"A system in which semi-independent business owners (franchisees) pay fees and royalties to a parent company (franchiser) in return for the right to become identified with its trademark, to sell its products or services, and often to use its business format and system. Compared to licensing, franchising agreements tends to be longer and the franchisor offers a broader package of rights and resources which usually includes: equipment, managerial systems, operation manual, initial trainings, site approval and all the support necessary for the franchisee to run its business in the same way it is done by the franchisor. In addition to that, while a licensing agreement involves things such as intellectual property, trade secrets and others while in franchising it is limited to trademarks and operating know-how of the business. TYPES OF FRANCHISES There are three available types of franchises.The first type is the dealership,a form commonly found in the automobile industry.Here,the manufacturers use franchises to distribute their product lines.These dealership act as the retail stores for the manufacturer.In some distance,they are required to meet quotas established by the manufacturers,but as is the case for any franchise,they benefit from advertising and management support provided by the franchisor.The most common type of franchise is the type that offers a name,image and method of doing business,such as McDonald’s,KFC,Holiday Inn. There are many of these types of franchises,and their listings,with pertinent information can be found in various sources. A third type of franchise offers services.These include personnel agencies,income tax preparation companies and real estate agencies.These franchises have established names and reputation and methods of doing business.In some distances,such as real estate,the franchisee has actually been operating a business and then applies to become a member of the franchise. CONTRACT MANUFACTURING Contract manufacturing refers to a situation where a business will engage the services of an independent party to perform a specified duty for the business. In terms of manufacturing, contract manufacturing refers to a situation where a manufacturer will engage the services of an independent party to perform a specified job. There are various reasons for this type of engagement by manufacturers, all of which involve the maximization of profit. The process of contract manufacturing also has some negative considerations that include the risk of uncertainty and lack of control over the process. WHOLLY OWNED SUBSIDIRIES Entering a foreign market with a wholly owned subsidiary involves creating a local firm without the aid of a local partner. There are two ways of doing this. The first is through what is called greenfield development. This involves creating a new organization in the foreign country from the ground up. The second method is what is referred to as brownfield development. This involves purchasing an existing company in a foreign country. Brownfield developments can be beneficial because they offer local expertise, but they can be difficult because there may be resistance from those in the company  to new ownership. JOINT VENTURE A market entry option which the exporter and a domestic company in the target country join together to form a new incorporated company. Both parties provide equity and resources to the JV and share in the management, profits and losses. The JV be limited to the life of a particular project. This option is popular in countries where there are restrictions on foreign ownership, eg. China and Vietnam PIGGYBACKING Piggyback marketing – low cost market entry strategy in which two or more firms represent one another’s complementary (but non-competing) products in their respective market. Or, in other words, it is an arrangement, where two or more companies help each other to market their products, where the products have to be complementary and not competing against each other. LEVEL OF INVOLVEMENT IN INTERNATIONAL MARKETS No direct foreign marketing: A company in this stage does not actively cultivate customers outside national boundaries; however this company’s products may reach foreign markets. Sales may be made to trading companies as well as foreign customers who come directly to the firm. Or products may reach foreign markets via domestic wholesalers or distributors who sell abroad without explicit encouragement or even knowledge of the producer. As companies develop web sites on the internet, many receive orders from international Web surfers. Often an unsolicited order from a foreign is what piques the interest of a company to seek additional international sales. Infrequent Foreign marketing: Temporary surpluses caused by variations in production levels or demand may result in infrequent marketing overseas. The surpluses are characterized by their temporary nature; therefore sales to foreign markets are made as goods are available, with little or no intention of maintaining continuous market representation. As domestic demand increases and absorbs surpluses, foreign sales activity is withdrawn. In this stage, little or no change is seen in company organization or product lines. However, few companies today fit this  model because customers around the world increasingly seek long term commercial relationships. Further, evidence exists that financial returns from initial international expansions are limited. Regular Foreign marketing: At this level, the firm has permanent productive capacity devoted to the production of goods to be marketed in foreign markets. A firm may employ foreign or domestic overseas intermediaries or it may have its own sales force or sales subsidiaries in important markets. The primary focus of operations and production is to service domestic market needs. However, as overseas demand grows, production is allocated for foreign markets, and products may be adapted to meet the needs of individual foreign markets. Profit expectations from foreign markets move from being seen as a bonus to regular domestic profits to a position in which the company becomes dependent on foreign sales and profits to meet its goals. International marketing International marketing is the export, franchising, joint venture or full direct entry of a marketing organization into another country. This can be achieved by exporting a companys product into another location, entry through a joint venture with another firm in the target country, or foreign direct investment into the target country. The development of the marketing mix for that country is then required international marketing. It can be as straightforward as using existing marketing strategies, mix and tools for export on the one side, to a highly complex relationship strategy including localization, local product offerings, pricing, production and distribution with customized promotions, offers, website, social media and leadership. Internationalization and international marketing meets the needs of selected foreign countries where a companys value can be exported and there is inter-firm and firm learning, optimization and efficiency in economies of scale and scope. The firm doe s not need to export or enter all world markets to be considered an international marketer. Global Marketing Global marketing is a firms ability to market to almost all countries on the planet. With extensive reach, the need for a firms product or services is  established. The global firm retains the capability, reach, knowledge, staff, skills, insights, and expertise to deliver value to customers worldwide. The firm understands the requirement to service customers locally with global standard solutions or products, and localizes that product as required to maintain an optimal balance of cost, efficiency, customization and localization in a control-customization continuum to best meet local, national and global requirements to position itself against or with competitors, partners, alliances, substitutes and defend against new global and local market entrants per country, region or city. The firm will price its products appropriately worldwide, nationally and locally, and promote, deliver access and information to its customers in the most cost-effective way. The firm also needs to underst and, research, measure and develop loyalty for its brand and global brand equity (stay on brand) for the long term. b)OULINE ADVANTAGES AND DISAVANTAGES OF EACH STRATEGY. Advantages of direct exporting: -Control over selection of foreign markets and choice of foreign representative companies. -Good information feedback from target market. -Better protection of trademarks, patents, goodwill, and other intangible property. Potentially greater sales than with indirect exporting. Disadvantages of direct exporting: Higher start-up costs and higher risks as opposed to indirect exporting; Greater information requirements; Longer time-to-market as opposed to indirect exporting. Advantages of the international franchising mode: -Low political risk -Low cost -Allows simultaneous expansion into different regions of the world -Well selected partners bring financial investment as well as managerial capabilities to the operation. Advantages of indirect exporting -Its an almost risk-free way to begin. -It demands minimal involvement in the export process. -It allows you to continue to concentrate on your domestic business. -You  have limited liability for product marketing problems theres always someone else to point the finger at! -You learn as you go about international marketing. -Depending on the type of intermediary with which you are dealing, you dont have to concern yourself with shipment and other logistics. Disadvantages of indirect exporting: -Your profits are lower. -You lose control over your foreign sales. -You very rarely know who your customers are, and thus lose the opportunity to tailor your offerings to their evolving needs. -When you visit, you are a step removed from the actual transaction. You feel out of the loop. -The intermediary might also be offering products similar to yours, including directly competitive products, to the same customers instead of providing exclusive representation. -Your long-term outlook and goals for your export program can change rapidly, and if youve put your product in someone elses hands, its hard to redirect your efforts accordingly. Advantages of licensing -Obtain extra income for technical know-how and services -Reach new markets not accessible by export from existing facilities -Quickly expand without much risk and large capital investment -Pave the way for future investments in the market -Retain established markets closed by trade restrictions -Political risk is minimized as the licensee is usually 100% locally owned -Is highly attractive for companies that are new in international business. Disadvantages of licensing -Lower income than in other entry modes -Loss of control of the licensee manufacture and marketing operations and practices leading to loss of quality -Risk of having the trademark and reputation ruined by an incompetent partner -The foreign partner can also become a competitor by selling its production in places where the parental company is already in. -investment to attract prospects and support and manage franchisees. Advanatges of Frachising -Franchising provide knowledge of the local markets. A franchise provides franchisees with a certain level of independence where they can operate their business. A franchise provides an established product or service which may already enjoy widespread brand-name recognition. This gives the franchisee the benefits of a pre-sold customer base which would ordinarily takes years to establish. A franchise increases your chances of business success because you are associating with proven products and methods. Franchises may offer consumers the attraction of a certain level of quality and consistency because it is mandated by the franchise agreement. Disadvantages of franchising: -Franchisees may turn into future competitors. -Demand of franchisees may be scarce when starting to franchise a company, which can lead to making agreements with the wrong candidates -A wrong franchisee may ruin the company’s name and reputation in the market -Dependence on franchisee. -Potential conflicts with franchisee. Advantages of Joint Venture: -Accessing additional financial resources Asset sharing is one of the best advantages about joint venture. Since, you are able to use larger funds to facilitate the production and operation of projects and products, you facilitate growth. In other words, you increase profit margin and increase your revenue potential. -Sharing the economic risk with co-venturer It pays to have someone sharing the responsibility with you in case you end up in deep troubles. This is also true with joint venture. Since you are sharing assets, the risk of losing a great deal of money is divided to both parties. -Widening economic scope fast – Building reputation is often difficult, not to mention time consuming and expansive. At a joint venture, you are able to widen your economic scope without spending too much money and waiting for a long time. Tapping newer methods, technology, and approach you do not have – In order to grow and expand, you need resources in the forms of methods, technology, and approach. For that matter, it would help a lot if you will be able to partner with an entity that presently has the things you don’t and the things you need. Joint venture opens up the venue for such need. -Building relationship with vital contacts – Aside from economic territory, another advantage of joint venture is the ability to give you business relationships with vital contacts. This is just like automatically befriending your partners influential friend that can give you access to lots of things such as business opportunities and a pass to vital information. Disadvantages of Joint Venture: -Shared profit – Since you share assets, you also share the profit. The profit of both parties usually depends on the size of the share to the venture or may be defined on the agreement. -Diminished control over some important matters Operational control and decision making are sometimes compromised in joint ventures. Since there is an agreement that divides which one will take over a particular operation, the other may not be satisfied with how the things are worked out with another. This leads us to another disadvantage of a joint venture. -Undesired outcome of the quality of the product or project – Since one party may not have control on the supervision of the production or the execution of one part of the system, this can happen. This often leads to disputes and lawsuits. To avoid this, both parties agree on specific details about the whole operation process. -Uncontrolled or unmonitored increase in the operating cost – Again, defined control over the operation may lead to this disadvantage. It is important therefore to make sure that all things are clarified on the paper before singing in the joint venture agreement. Advantages of contract manufacturing -Low financial risks contract manufacturing allows companies to save costs by manufacturing a particular item at a cheaper rate than what it would cost them If they decided to undertake the manufacturing process themselves. it allows the company doing the outsourcing to shave some time off the whole process, giving them quicker returns and turnovers. Where a company is less effective than another in manufacturing an item, contract manufacturing will allow it to concentrate on that in which it is the most efficient. Disadvantages of contract manufacturing -Reduced learning potential -Potential public relations problems may need to monitor working conditions. -The company doing the outsourcing faces some degree of risk if it fails to do its research properly. This is because outsourcing the manufacturing to the wrong company could end up costing the company more, rather than less, if the outsourced company fails to deliver as expected. Advantages of wholly owned subsidiaries On the positive side, a wholly-owned subsidiary that does its business in a location different from the parent companys is able to remain in its locale. With the business world spanning so many countries, this can serve as a great advantage in international situations. Name recognition is another positive reason for maintaining a wholly-owned subsidiary. If a particular brand name is well known and popular, the parent company has no reason to absorb the subsidiary entirely. Wholly-owned status allows the subsidiary to retain its name brand, thus avoiding hindering its sales. Diversity for the parent company is another perk created by maintaining a wholly-owned subsidiary. This status allows the parent company to branch out into different products and markets, building strength in diversification. Disadvantages of wholly owned subsidiaries a wholly-owned subsidiary are more business oriented. The holding company runs a definite risk in assuming control of another company while allowing its management to continue to operate independently of the parent companys. The level of investment and allocation of funds and resources required is also very high. A parent company must spend a great deal of time and money to smoothly integrate the new subsidiary.All of these factors require commitment and dedication on the part of the holding company and willingness to form that partnership on the part of the subsidiary. Advantages of piggybacking reduced financial costs limited risk quick, easy access to the market. Generally, the supported company can make immediate profits on the new market. The SME can, thus save time (3-5 years), compared to the normal length of time necessary to establish itself ; reduced logistical and administrative operations ; benefit of the brand image that the supporting company brings to its products ; immediate availability of a sales force structure ; excellent market knowledge of the supporting company. Disadvantages of piggybacking weak motivation of large companies to become supporters ; difficulty in finding partners offering a compatible product and distribution network ; risk of market loss, which can be reduced due to the complementarity of the product, and commercial follow-up between the partners ; occasional difficult relations because of differences in size or culture ; risk of lack of mutual confidence and of lack of involvement ; risk of conflict of interest (e.g. local agents could systematically put the interests of the supporting company before those of the supported company) ; occasional very rigid requirements and conditions of access to the commercial networks of large companies. These conditions can be qualitative (e.g.: product quality) and quantitative (minimum level of annual turnover, high commissions, etc.). Macro Environmental Influences That Can Affect SAB Millers SABMillers origins date back to the foundation of Castle Breweries in 1895 as to serve a growing market of miners and prospectors in and around Johannesburg, South Africa. Two years later, it became the first industrial company to list on the Johannesburg Stock Exchange and the year after (1898) it listed on the London Stock Exchange. From the early 1990s onwards, the company increasingly expanded internationally, making several acquisitions in both emerging and developed markets. In 1999, it formed a new UK-based holding company, SAB plc, and moved its primary listing to London. In May 2002, SAB plc acquired Miller Brewing, forming SABMiller plc. It is very important that SAB Miller considers its environment before going into international the market. In fact, environmental analysis should be continuous and feed all aspects of their planning to go international The macro-environment refers to the major external and uncontrollable factors that influence an organizations decision making, and affect its performance and strategies. These factors include the Political (and legal) forces, Economic forces, Sociocultural forces, and Technological forces. These are known as the PEST factors. PEST Analysis Political Factors: The political environment revolves around the current government in a particular country in which SAB Miller manufactures or trades, and also laws/legislation operate or within their home market as well as overseas. If their government is socialist then perhaps there is a policy to tax more and to invest in the public sector. On the other hand if SAB Millers have a more conservative or Republican government then the free-market is left to take control, taxation is less and there is often a smaller public sector. The political arena has a huge influence upon the regulation of the business, and the spending power of consumers and other businesses. SAB Miller must consider issues like: †¢How stable is the political environment in that country? †¢Will government policy of that country influence laws that regulate or tax SAB Miller? †¢What is the governments position on marketing ethics? †¢What is the governments policy on the economy? †¢Does the government have a view on culture and religion? †¢Is the government involved in trading agreements such as EU, NAFTA, ASEAN, or others? Economic Factors The economic environment is a direct influence on all businesses. Obviously if you are studying marketing there is a huge element of economics within the topic itself, and you should be no stranger to the principles of economics. As we saw from our lesson on the marketing environment there is a macro environment, and internal environment and the microenvironment. More specifically youll be at looking elements such as where a business is in terms of the current business cycle, and whether or not they are trading in a recession. SAB Millers marketers need to consider the state of a trading economy in the short and long-terms. This is especially true when planning for international marketing. You need to look at: 1. Interest rates. 2. The level of inflation Employment level per capita. 3. Long-term prospects for the economy Gross Domestic Product (GDP) per capita, and so on. Sociocultural Factors The Sociocultural environment embodies everything which is social and cultural within a nation or society. There are plenty of examples of society and culture on the marketing teacher website, so we recommend that you go to our lesson store and look through some of the consumer behaviour pages. Some notable examples would include the influence of learning, memory, emotion and perception, motivation, lifestyle and attitude and consumer culture. Have a look at the six living generations in America, social environment and class, the impact of your birth order on how you behave as a consumer and take a look at the eight types of online shoppers. In a more general sense consider influences such as the increase in life expectation of Western consumers, and demographics which is the study of populations. The social and cultural influences on business vary from country to country. It is very important that such factors are considered. Factors include: 1. What is the dominant religion? 2. What are attitudes to foreign products and services? 3. Does language impact upon the diffusion of products onto markets? 4. How much time do consumers have for leisure? 5. What are the roles of men and women within society? 6. How long are the population living? Are the older generations wealthy? 7. Do the population have a strong/weak opinion on green issues? Technological Factors Technological factors are a multifaceted influencer. Lets just think about the sorts of technology that you come in touch with almost daily. Smart phones such as Android and iphone are now common – all – garden, and we are used to being able to access information and communication technology instantly no matter where we are. During studies or at work we have access to information on quick PCs and over the Internet, with faster broadband connections arriving in many parts of the world. Technology also surrounds business processes. As we saw from our lesson on the functions within an organisation all departments use information technology or technology in one form or another. Our manufacturing operations will use technology to produce goods and services. Our logistics and warehousing functions use forklifts and Lorries as well as order tracking technology and software. The customer service department will use communication technology to talk to customers but will also have access to internal systems, such as technology to simplify credit control and stock control for example. There are many, many more examples of technology. Technology is vital for competitive advantage, and is a major driver of globalization. Consider the following points: 1. Does technology allow for products and services to be made more cheaply and to a better standard of quality? 2. Do the technologies offer consumers and businesses more innovative products and services such as Internet banking, new generation mobile telephones, etc? 3. How is distribution changed by new technologies e.g. books via the Internet, flight tickets, auctions, etc? 4. Does technology offer companies a new way to communicate with consumers e.g. banners, Customer Relationship Management (CRM), etc?

Edward Hallet Carrs Arguments In What Is History?

Edward Hallet Carrs Arguments In What Is History? Introduction This essay attempts to review Edward Hallet Carrs (1892-1982) arguments in his book What is History? According to Carr, history is a continual process of interaction; a dialogue between the historian in the present and the facts of the past and the relative weight of individuals and social elements on both sides of the equation. Advocating the adoption of a suitable philosophy to the approach of writing history, in terms of selecting, distinguishing and interpreting historical fact, Carr elucidates that great history is written when the historians view of the past is illuminated by insights into the conditions of the present. In addition to continually asking why, the historian also needs to project into the future. This essay attempts to understand Carrs views on objectivity, truth and narrative in the arguments put forth in his book What is History? and the assessment of his arguments by other historians. H.E. Carrs Arguments on What is History In his arguments on What is History? Carr sets out the following premise. History is a continual dialogue between the past and the present; an interaction between the historian and his facts. Establishing the criteria for selecting historical fact, Carr argues that fact itself is insufficient and must be correctly and truthfully interpreted. To arrive at a correct interpretation and factual account of history, a historian must continually question why and whither, as history in essence is change. Carr also underlines the fact that historians, as individuals, cannot be divested from the society they live in. A proper philosophy to the approach of history is thus essential for the historian. Each era or century has its own interpretation of what history is. As a social process, history is an interaction between the past and the present and between the society of today and yesterday. History according to Carr contains a corpus of ascertained facts and these are available to the historian in documents. He however asserts that fact without accurate interpretation is ineffectual. To understand this, one has to first distinguish historical fact from other facts in the past. Carr discusses historical fact in light of the Empirical or Common Sense View of History. There are certain basic facts that are the same for all historians and which form the backbone of history. These facts, however, form the raw material for the historian, rather than history itself. The necessity to verify the truth of these basic facts rests on a priori decision by the historian. Whilst accuracy of such facts is a necessary, a historian must also rely on the auxiliary sciences of history archaeology, epigraphy, numismatics, chronology amongst others. A historian like any other scientist must continually ask the question why. The question whither also assumes importance, since the line of demarcation between pre-historic and historical times is eclipsed when people cease to live only in the present and become consciously interested in their past and future. However, Carr also reveals that as a social being the historian is naturally and inclined to be selective of the facts he chooses. Our picture of the past has been preselected and predetermined for us by people who consciously or unconsciously imbued a particular view and saw those facts as worthy of preserving. Carr likens history to an enormous jigsaw puzzle with many missing parts. A lacunae in the historical facts of 5th century Greece B.C has arisen due to one sided view of Greece from the Athenian citizen. Hardly any information is available on how it looked to other citizens like the Spartan, Corinthian, Theban or even a slave. The 19th century fetishism of facts was complemented by an equal fetishism for documents. However, none of this means anything unless the author has actually deciphered and processed the facts found in these documents before making use of them. Carr defines the method the historian makes use of facts as the processing process. The Stresemanns Vermà ¤ch tnis volume is one such illustration of the selectiveness of historians. Sometimes mere fact about the past is transformed into history. For example while the Battle of Hastings 1066 is an important historical event, it is the historian who decides the whether the inclusion of Caesars crossing of the Rubicon is a relevant historical fact. Or the mention of the murder of a ginger bread vendor at Stalybridge Wakes in 1850 is equally relevant. Their status as historical facts will depend on their interpretation. Correct and truthful interpretation of historical fact is equally important stresses Carr. Facts are like fish swimming about in a vast and sometimes inaccessible ocean. What the historian catches will depend largely on which part of the ocean he is fishing and what fish he intends to catch. The ancient or mediaeval historian may be grateful for the large winnowing process which has over the years put a manageable corpus of facts at their disposal. The modern historian on the other hand has the dual task of discovering a few significant facts and discarding the insignificant ones as unhistorical. Each historian belongs to his own age and is bound to it by the conditions of human existence. An understanding of the past can be achieved by an insight into present conditions. The choice of words for example democracy, empire or war, are connotations linked to the historians specific time in history. Similarly, over the years, a change in the balance of power, world wars and other movements have also influenced historical writing. French history in the latter twentieth century was deeply affected by the Russian Revolution of 1917. Carr advises historians that equal importance should be given to the date and publication of writing as the name of the author when commencing on a study. Carr states it is imperative that the author should neither dwell solely on the past nor disassociate totally from it, but master and understands it, as the key to understanding the present. The reconstitution of the past in the historians mind is dependent on empirical evidence, but is not in itself an empirical process as facts do not speak for themselves. The process of reconstitution governs the selection and interpretation of facts. This indeed is what makes them historical facts. The facts of history are never handed down to us in a pure form clarifies Carr. They are always refracted through the mind of the recorder. When a historian takes up a work of history, the authors first concern should not be with the facts, but rather an understanding of the historians who wrote it and their back ground. To appreciate the work of the English Liberal Historian, Trevelyan England under Queen Anne, one must interpret it against the background of his traditional Whig historian lineage. To appreciate the thoughts behind peoples action, Carr exhorts historian to cultivate an imaginative understanding of the minds of people they are dealing with for a correct interpretation of historical fact. Historians must necessarily cultivate an objective approach to history asserts Carr. The duty of the historian to respect fact cannot be overshadowed by the obligation to see that the facts are accurate. The historian must seek to bring into the picture all known or knowable facts, relevant in one sense or the other to the theme and the interpretation proposed. History is meaningless in a static world affirms Carr. History in its essence is change reveals Carr. It is meaningless in a static world. A society which loses its belief in its capacity to move into the future will quickly cease to concern itself with its progress in the past. History can be accurately written by those who find and accept a sense of direction in history itself. Whilst writing history, two processes must go hand in hand input and output, states Carr. Working historians must stop and reflect what they are doing. The historian can thus effectively mould facts to his interpretation. Speaking from his own experience, Carr reveals that the process of reading and writing are simultaneous exercises for him. The writing is added to and subtracted from as he goes along. He found that his reading was more guided and directed by the writing as he went along. Assessment of Carrs Arguments Since its publication in 1961 E.H. Carrs What is History? the book established itself as a classic reference on the subject.  [1]  Yet despite its widespread recognition, many inner flaws and contradictions have surfaced, sparking several debates on Carr supposition of What is History? Whilst rejecting the crude and rigid re-constructionist stance of the empiricist, Carr as a political constructionist historian has failed to visualise the post modern challenge to the distinction between fact and fiction in historical narrative and the influence of root metaphors.  [2]  His epistemological position is revealed through his scepticism about the nature and status of historical knowledge and sociology of knowledge. (Alan Munslow). Over the years there have been disagreements about Carrs contribution to the analytical philosophy of history, shadowing the distinction between re-constructionism and constructionism.  [3]   Authors Anders Stephanson and Rendall Germain in their appraisal conclude that Carrs answers to the questions he has set about history are in themselves unsatisfactory. Another writer, Keith Jenkins underlines the futility of Carrs empirical-analytical concept particularly in light of the post modern challenges.  [4]  Carr devalues his currency of re-constructionist theory, by his ultimate acceptance of the epistemological model of historical explanation as the best method to create and evaluate historical thought.  [5]   Exploring Carrs epistemological claim to radicalism and his insistence that a historian cannot divorce himself from the outlook and interests of his age, Historian Alan Munslow, highlights the fact that today with greater awareness of the weakness of representation, reference and inductive inference, a larger part of historical writing is based on the supposition that we cannot know any absolute truths about the past. Whilst acknowledging Carrs attention to the discursive nature of historical facts, Historian Alex Callinicos refutes Carrs opinion that the importance of empirical evidence diminishes since the facts of history are refracted through the mind of the historian.  [6]  Rather this premise gives rise to the question of the historians subjective bearing on the facts. Carr drops his objectivist anchor when he argues that Historian Collingwoods logic of sceptical position leads to the idea that there is no certainty in historical meaning and that the discourses of historians, or what Carr termed as total scepticism, like something spun out a human brain, suggests that there could be no objective truth in historical writing.  [7]  Supporting his own belief in the power of empiricism, Carrexplicitly rejected Nietzches notion that historical truth is defined by fitness of purpose. This misguiding percept excludes the possibility that one interpretation is as good as another.  [8]   While confirming the necessity of a continual interaction between the historian and his facts, Carr was unwilling to acknowledge that the written historical fact could possibly be a work of fiction.  [9]  He overlooks the reality that new evidence and new theory can offer new interpretations. Carrs epistemological theory of knowledge argues that the past is known from its evidence and remains so whilst being introduced in the historical narrative.  [10]   For example, Carrs argument that facts are a priori decision of the historian, and that the historians influence on and the arrangement of these facts is what constitutes historical meaning. However, this gives rise to the risk of subjectivity and the outcome may not be an accurate representation of the evidence.  [11]   Carr pulls back from relativism which his own logic has thrust him into. Aware that he is running a post empiricist wind, he rejects Collingwoods demand for the emphatic and constructive approach and cites another historian who accepts the model of dialogue between past and present, while keeping an objective point of view. This profile of a historian is affirmed by the American Commentators Joyce Appleby, Lynn Hunt and Margaret Jacob who repacked Carrs position as practical realism.  [12]   Carr uses his objectivist angle to underplay the problems of historical form.  [13]  He does this by arguing that the standard for objectivity in history is the historians sense of the direction in history, which means the historian selects facts not on personal bias, but on the ability to choose the right facts, or, in other words, that he applies the right standard of significance.  [14]   Carrs objective historian is one who has the ability to see beyond the inadequate vision of his own position in society and history and at the same time has the ability to visualise the future to give him a more in depth and enduring understanding of the past.  [15]   The objective historian is also one who penetrates most deeply into the mutual method of fact and value, who recognises that facts and values are not necessarily in opposition to differences in standards emerging from disparity of historical fact, and vice versa. An objective historian also understands the boundaries of historical theory. Carrs insists that the objective historian should develop the habit of reading and interpreting the evidence at the same time. However, appropriate social theory precludes presumption or series of connected presumptions, of how people in the past acted intentionally and related to their social contexts.  [16]   Conclusion In his book What is History? H E Carr lays out the premises for conducting a correct approach and philosophy to writing history. History according to Carr is a continuous dialogue between the past and present and a continual interaction between the historian and the facts, for a correct interpretation and accurate recording of facts. It is constantly changing. It is important therefore for the historian to develop a proper philosophy of history before undertaking a study, where historical fact, the criteria for selection of, and their factual interpretation are of vital importance. Carrs arguments about objectivity and his epistemological theory of knowledge have been widely criticised by empiricist as well as the social theory historians. His failure to visualise post modern challenge to the distinction between fact and fiction in historical narrative and his inclination towards post-empiricism despite his claims to radicalism have reduced the currency of his re-constructionist theory.

Cause And Effects Of Smog Pollution Environmental Sciences Essay

Cause And Effects Of Smog Pollution Environmental Sciences Essay Smog pollution is a major problem that this planet is suffering from everyday. It has affected our homes, weather, and health. It is a very dangerous situation for us if we do not do anything about it. Smog pollution is caused by chemicals, automobiles, factories and corporations. The greatest thing we can do as a society is try to find a way to help prevent and stop smog pollution. If the people on this planet do not do anything to stop smog pollution we are going to have a BIG problem and it will hurt us in the future. We need a plan and we need to put a stop to smog pollution. The American Lung Association (ALA) has been trying to find ways to help stop and prevent smog pollution from hurting us and the environment. If we can just do our part and find a way to prevent this problem from getting any bigger, it will benefit us all. We all have heard of smog pollution, but do we really know what it is. Smog pollution has many causes that can be hazardous and dangerous to our health and well being. The term smog pollution is also known as photochemical smog. It is formed by the interaction with sunlight with different types of chemicals in earths atmosphere (Oblack). The main component of smog pollution or photochemical pollution is ozone. Ozone is in the earths stratosphere, which the shields the earth from dangerous UV radiation from the sun. The problem with ozone is when it touches down on the earths surface it can be very dangerous and can cause serious health problems for people on the planet (Oblack). The ground level ozone is made by the emissions of automobiles that put nitrogen oxide into the air, which is caused by the vehicles exhaust fumes (Oblack). The organic components from the fumes combined with the ozone and fume evaporation that combines with sunlight, causes smog pollution on the planet (Oblack). Many people try to find ways to help avoid smog in a more planet friendly environment, so some people use substitutes for their everyday use. There is just one problem with that, and that is the sun. Many people dont understand that sunlight and warm climates cause pollution. For example, places like California, Florida, and Arizona and even North America are some of the most polluted places in the country (Oblack). Another problem that causes an increase in smog pollution is the increased usage of fossil fuels for industrial, heating, and of course transportation purposes (All that smog). Also, cutting down, burning trees, and disposing of agricultural and organic waste can also lead to emissions of smog pollution and harmful problems for the planet (All that Smog). Sunlight mixed with different types of dangerous chemicals (se condary pollution) also makes it difficult to stop smog pollution from occurring on the surface of the planet (All that Smog), which creates another big problem. Climate is a major factor for the cause of smog pollution. Many places in the world can try to be more environmental friendly to help save our planet. Some people ride bicycles instead of driving cars. Other people try to reduce their use of using fire to warm themselves. The only problem that these people cannot get away from is something that they cannot control, and that is the sun. California is ranked in the top 10 most polluted areas in the United States. Ozone pollution that is caused by the sun has a major affect on this planet. Smog and air pollution is having a serious impact on the environment and can condemn all ecosystems (seirraclub). The reason why the sun causes so many problems is because the ozone layer that is supposed to protect planet earth is practically destroyed. Without the protection, the sun is able to shine radiation onto the planet and is the main reason for many health issues that people go through every day. Issues like skin cancer, radiation poisoning, and sun burn are having fatal affects on people. This type of pollution not only harms humans, but it can also harm wild life and the environment. Smog can harm different plants, which can lead to damaging consequences. Because the plants are damaged, it makes it hard for plants to make and save food for themselves in their living environment (seirraclub). In addition, the sun and smog can destroy leaves and plants it would make many of the plants vulnerable to getting diseases. And, they cannot defend themselves from different types of bugs and insects that can cause a huge decrease in plant life (seirraclub). Smog pollution is a yearly problem for places like Texas, Georgia, Florida, and many other southern and sunny parts of the world, but there is also a big increase in smog pollution in the summer (seirraclub). This is caused by strong sunlight that burns the earths surface. However, the one thing that is helping smog pollution is all of the problems that are on this planet. A ll of the power plants, automobile emissions, industrial, and chemical vapors are other causes of pollution (seirraclub). Climate changes are part of the problem as well. Within the months of June, July, and August, it makes it harder to try and control the smog pollution, due to the sun. This planet has gone through billions of years of evolution. It survived dinosaurs, the ice age, and the black plague, but because of smog pollution this planet might not be able to survive this new attack. A major problem smog pollution is causing is health concerns for the public. Smog pollution is affecting human health because it is making it harder to breathe the smog induced air. Because of this and sun radiation, this is resulting in many fatalities, including skin and lung cancer. Peoples lungs and hearts can be dangerously affected by smog and air pollution (Oblack). Many people are still skeptical about smog pollution, but one thing that is known is long term exposure can result in dangerous and even fatal heath affects to people (Oblack). Some of the long term affects caused by exposure to smog pollution are problems breathing, coughing, wheezing, pneumonia, bronchitis, inflammation of the pulmonarys, lung cancer, heart problems, asthma like symptoms, pre mature aging of lungs, and last, but not least, death (Oblack). Smog pollution, even in small doses, can be very dangerous and harmful to all people. The American Lung Association estimated that 48 percent of people in the w orld live with very high levels of smog (seirraclub). Even though exposure to smog is dangerous, there are three types of people who can be severely damaged from smog, which include children, the elderly, and people with respiratory problems (seirraclub). The Environmental Protection Agency (EPA) has created the Air Quality Index which lets you check the air density and pollution level around your areas (seirraclub). Furthermore, The Department of Motor vehicles have been trying to develop a plan to reduce vehicle emission and try to improve on air quality for the planet and help save the planet (Malone). The DMV has also been trying to encourage the residents of the United States to help stop smog. They are trying to do their part by asking people to report anyone who has visible exhaust coming out of their automobiles (Malone). If we can all do our fair share and help support this plan we can be able to help stop smog pollution. In all, smog pollution is a major concern for our environment and this planet. If we do not find a way to try and stop smog pollution, we will have many more health problems. Fortunately, there are people who are trying to find ways to stop smog pollution. Many people who are trying to create plans that can help bring this planet back to a healthier state. In 1996, smoking vehicle program was passed that stated that anyone who sees smoking exhaust coming from cars, trucks, or any other motor vehicles were to voluntarily report it to the authorities as a way of preventing polluted air (Malone). It is also there to help educate people about smog pollution and what they can do to help stop it (Malone). The American Lung Association (ALA) also came up with certain help to bring attention to the issue of smog pollution. They advised people to pay more attention to the Air Quality Index (AQI) around their area. They tried to educate people about Ozone action days and how not to ignore them . Finally, ALA attempted to help people get familiar with how smog adversely affects their health (Oblack). The Environmental Protection Agency (EPA) takes it upon them to check evidence every five years to see whether or not the situation of smog pollution has changed for better or worse (seirraclub). It is very simple to stop smog pollution. We can all use our cars, trucks, and motorcycles, sparingly. We all must try to do our fair share and we must be able to bring awareness to how dangerous the sun can really be. We need to fight back against smog. If we do not do anything about it, this planet and everything on it will suffer. Group against Smog and Pollution (GASP) is a non-profit citizens group in Southwestern Pennsylvania working for a healthy, sustainable environment. GASP was founded in 1969, with a group of volunteers who were worried about air quality issues here in Pennsylvania. GASP has been a diligent watchdog, educator, litigator, and policy-maker on many environment al issues, with a focus on air quality in the Pittsburgh region. Their objective is to teach and enlighten the public about pollution and its remedies. Their Mission Statement is will act to obtain for the residents of Western Pennsylvania clean air, water, and land in order to create a healthy, sustainable environment and quality of life to which we are entitled (Groups against Smog and Pollution.) Obviously GASP is doing their part, but what are we doing as individuals to help?

Discuss Lennies Motives In Killing Lennie. :: essays research papers

Of Mice and Men, by John Steinbeck, is a story that shows how weak people can be in the sense of loyalty. This loyalty, defined as putting strong will and strength into a relationship in all cases is being put into a light of making choices. This means you have to make the decision between Loyalty and "Friends", which also can be described as people that are together but basically are lonely for themselves and that decision-making is important. If you watch the whole novel as a representative book of American Culture, you strongly can see that basically every person is afraid of going in depth. How did Curly react on Lennie's act of killing his wife? In my opinion he acted very raging and upset. He made the decision right away to look for Lennie and kill him ("Curly wanta get him lynched", p. 94). I would take this as an example of not reacting in-depth and looking at all aspects of an issue. But what does this have to do with George's Motives to kill Lennie? Be honest: How many choices did George really have? For stating the situation: A person called Lennie is committing an unwanted crime on a loved person that has the affect of making the husband raging. Lennie hides, and the husband comes after him with a rifle with the will to kill him for this act. George finds it out and is automatically involved with this situation although he hasn't done a thing. And now he has to make a decision for someone who is not able to understand that he can't make any. The first possibility for George would have been, as it also happened in the book, to kill Lennie before he is being killed by Curly, the husband of Curley's wife. But there the question of moral comes up where you ask yourself it that really makes sense to kill somebody you love. In this case it definitely does. George thinks all the other situations through and sees that this is the only valid one. He has to think of himself too: He doesn't want to live a life of persecution, and his friends are also important to him. This seems to be a very weak argument, but watch the other possibilities. One of the other possibilities would have been not to care of it at all and just let Lennie be shot by Curly, who is all about threatening him in that minute.

Business Ethics Essay -- Business Ethics Morals

In today’s global society, a Code of Ethics policy is used to label established, acceptable behaviors among that industry’s business associates, potential investors, and the corporation’s executive officers and employees, and most important, the consumer (Ethics Resource Center, 2003). In an attempt to promote an increased efficiency and productivity potential level, among employees and prospective clients, a corporation’s standard Code of Ethics should guide its members toward a more in-depth examination of their personal moral activity, and how these actions affect the people or acquaintances they encounter. A company should utilize this strategy as a model for the professional behaviors and responsibilities of its constituents, and proves the occupational advancement of that business. Ethics are important in every level of a corporation, but specifically in the day-to-day actions of its members, and the image the company broadcasts to its associates is fundamental in building a stable business foundation. These pledges are a vital communication tool used to covey the firm’s standards for business operations, and predominantly, its relationships with the surrounding communities (Ethics Resource Center, 2003). The statement made in this example for discussion has credibility to a certain extent, but there are always reactions to any action, as stated in the basic laws of physics. This also holds true when scrutinizing the actions of a brain surgeon, a reporter, or an employee at a fast-food restaurant. The significance may not seem to be equal when determining the impact level of these jobs, but the individual attempts to perform at the highest possible intensity should always be the main goal (Horngr... ...s quite different after a new approach is applied to a specific situation, but a majority of the time, this strategy will provide the best possible action that should be applied to achieve a more balanced ethical code (Markkula Center for Applied Ethics, 2008). References: Ethics Resource Center (2003). Why Have a Code of Conduct? Retrieved September 6, 2008 from http://www.ethics.org/resources/wy-have-code.asp Horngren, C. & Harrison, W. (2007). Accounting: Chapters 1 - 17 (7th ed.). Upper Saddle River, NJ: Prentice Hall. Markkula Center for Applied Ethics (2008). A Framework for Thinking Ethically. Santa Clara University. Retrieved September 6, 2008 from http://www.scu.edu/ethics/practicing/decision/framework.html

Physics Dot Points Prelim

Physics syllabus dot point summary Nathan Kulmar 8. 2. 1. 1 describe the energy transformations required in one of the following: – mobile telephone – fax/modem – radio and television Energy is stored as chemical energy in the phone’s battery. Chemical energy is transformed into electrical energy to operate the phone.The microphone converts sound energy in to electrical energy. Antanna converts electrical to electromagnetic energy to send a siginal. The receiver speaker converts electric energy in to sound energy. 8. 2. 1. 2 describe waves as a transfer of energy disturbance that may occur in one, two or three dimensions, depending on the nature of the wave and the medium The energy from waves may spread out as a disturbance in Dimension- Energy travels in a straight line from the source 2 Dimensions- Energy spreads out in a plane or surface 3 Dimensions- Energy spreads out in to space surrounding the source in all directions 8.2. 1. 3 identify that mechan ical waves require a medium for propagation while electromagnetic waves do not Mechanical waves: require a medium, solid, liquid or gas to transfer energy. Electromagnetic waves: which don’t require a medium for transfer of energy. 8. 2. 1. define and apply the following terms to the wave model: medium, displacement, amplitude, period, compression, rarefaction, crest, trough, transverse waves, longitudinal waves, frequency, wavelength, velocity Medium: is what isn’t need for the electromagnetic spectrum to travel. Displacement: the distance from the point of equilibrium to the wave Amplitude: the distance to the point of maximum displacement Period: time taken o complete a single wave length Compression: an area where partials are pushed togetherRarefaction: point where a partial reaches it’s maximum displacement vertically down Crest: the point where a partial reaches it’s maximum displacement vertically up Trough: the point where a partial reaches itâ⠂¬â„¢s maximum displacement vertically down Transverse waves: the direction of travel is at right angles to the oscillation (figure 2) Longitudinal waves: the direction of travel is parallel to the oscillation (figure 1) Frequency: the number of oscillations that pass a point in a second.V. remoteMissilesNight visibility gogglesSoft tissue treatment| Microwaves| Antenna| MobilesSending info. Cooking| Radio waves| Antenna| CommunicationAstronomy| 8. 2. 3. 4 explain that the relationship between the intensity of electromagnetic radiation and distance from a source is an example of the inverse square law I? 1d2 The intensity of the electromagnetic radiation is proportional to 1 divided by the distance squared. As the waves travel further from the point of origin they spread out and become less intense. I=k/d2 I=intensity k=constant d= distance 8. 2. 3. outline how the modulation of amplitude or frequency of visible light, microwaves and/or radio waves can be used to transmit informatio n Information is converted into a wave and then placed on a carrier wave. It uses the properties of superposition to place the wave on to the carrier wave. Digital is made up of a series of one’s and zero’s. Digital encoding is made in to binary and are transmitted via light, microwaves, television waves and waves from the electromagnetic spectrum. There are two types of analogue transition one is AM. AM stands for Amplitude Modulation.This works by a using a high frequency carrier wave which has the modulation signal placed on it. Frequency will remain the same but amplitude will change. The other Form is FM. This stands for Frequency Modulation. A wave is frequency is chosen as the carrier wave and the modulation signal is placed on the carrier wave. Amplitude stays the same. 8. 2. 3. 6 discuss problems produced by the limited range of the electromagnetic spectrum available for communication purposes All EMR (electromagnetic radiation) will suffer attenuation (reduct ion in intensity) as they pass through the atmosphere or any other material.As the earth is bombarded with UV radiation from the sun the ionosphere becomes charged. This can cause problems such as ghosting which is a double image on your T. V. screen. Also large portions of EMR are unable to be used because they are too dangerous such as Gamma-rays and X-rays. Ultraviolet and visible are too difficult to produce and encounter too much interference. Near infrared and infrared also have difficult because of impurities in optical fibbers will absorbed the light. Microwaves and T. V. waves require line of sight to be practical. . 2. 4. 1 describe and apply the law of reflection and explain the effect of reflection from a plane surface on waves Electromagnetic waves may be reflected from a plane surface and they must obey the Law of Reflection: Angle of incidence equals the angle of reflection Incident ray, reflected ray and normal must all be in the same plane. 8. 2. 4. 2 describe ways in which applications of reflection of light, radio waves and microwaves have assisted in information transfer Light is used in optical fibbers to transmit data.The light is reflected off the inside of the glass tube and can carry multiple messages at the same time in a single fibber. Radio waves are reflected off the ionosphere to that they can travel a longer distance. Microwaves send transitions to satellites where they are reflected back through the atmosphere to earth. 8. 2. 4. 3 describe one application of reflection Plane surfaces Mirrors. They allow people to look at their bodies without distortion. Concave surfaces Satellite dishes. They focus incoming rays to a single point called the focus and energised the signal at this point. Convex surface Rear vision mirrors.They allow a large field of view in a small area but will give the viewer a false scene of distance Radio waves being reflected by the ionosphere Radio waves are reflected off the ionosphere to provide a greater distance to which a listener can be from the source of the broadcast. 8. 2. 4. 4 explain that refraction is related to the velocities of a wave in different media and outline how this may result in the bending of a wavefront Refraction is the phenomenon where waves appear to bend as the waves pass from one medium to another. If wavefronts strike a boundary at any other angle other than 90 ° than a change of speed will occur.If a wave goes from one medium to another and the speed is lower than it will bend towards the normal. If it goes into a medium where the speed is faster than it will bend away from the normal. The waves bend because the incident ray first strikes the medium it slows down and the rest of the ray continues at the same speed until it makes contact with the medium. It is the wavelength that changes not the frequency. 8. 2. 4. 5 define refractive index in terms of changes in the velocity of a wave in passing from one medium to another The refractive index is the ra tio of the two wave velocities during the efraction. The refractive index is a measure of how much the light bends. 8. 2. 4. 6 define Snell’s Law: V1V2=sin isin r V1 and V2 are the speeds of the waves in wave in the different mediums. Sin i is the angle of incidence and sin r is the angle of reflection. It is the relationship between speed, wavelength and angles of incidence refraction was determined experimentally by Willebrorod Snell and is known as Snell’s law. 8. 2. 4. 7 identify the conditions necessary for total internal reflection with reference to the critical angle If the critical angle is reached than the angle or reflection is 90 °.When the critical angle is exceeded than the light can’t escape and total internal refraction occurs. The light must be travelling from a medium with a higher refractive index to one with a lower refractive index. 8. 2. 4. 8 outline how total internal reflection is used in optical fibres Optical fibres are one application of total internal refraction. They are made of high purity glass, the central region is called the core and the outer region called the cladding. The cladding confines the light to the core and thus must have a lower refractive index than the core.Once information is digitally encoded, at the transmitting end, the signal is converted from electrical energy to light energy and then transmitted along the optical fibre. The information is sent as a series of coded pulses of light. The pulse is either on or off. At the receiving end it is decoded. 8. 2. 5. 1 identify types of communication data that are stored or transmitted in digital form CD ROMs (Compact Disk Read-Only Memory) these discs store data in digitised form as tiny bits. They are read using a low power laser beam. They cannot be edited and are read only.They are fairly slow to read and can only store 8000Mbytes DVD (Digital Versatile Discs) these disks can hole 5 billion bytes of data, thus making possible the storage of m emory consuming movie length video and sound. GPS (Global Positioning Systems) this worldwide system uses a fleet of 24 satellites that transmit signals constantly. A GPS system, few hundred dollars, can interact with the satellite to pinpoint your latitude, longitude and altitude with in 50m. 8. 3. 1. 1 discuss how the main sources of domestic energy have changed over time.The sources of domestic energy have changed rapidly over time: * 50,000 BC: control of fire: cooking and heating * 10,000 BC: domestication of animals: animal power for transport and ploughing. * 3,000 BC: wind and water power: sailing boats and windmills * 1750 AD: burning of coal begins to replace wood. Steam engines, trains, steam, ships. * 1780-1800: scientific investigations of the properties of electricity. Conflicting theories, scientific curiosity small amounts of energy in batteries. * 1830’s: discover how to generate electricity using a â€Å"dynamo† (generator).Still used in scientific la bs. * 1880-1910: a flood of inventions such as the light bulb, telephone, gramophone and radio were create with electricity. * 1950- : all industrialized nations had become totally converted to electricity for domestic power. 8. 3. 1. 2 assess some of the impacts of changes in, and increased access to, sources of energy for a community Some impacts of charges in sources of energy are: * The use of coal has had a particularly large impact on our society. * Coal burns hot fires to make steel and other metals. Steel major factor that lead to the industrial revolution. * Coal lead to the development of the steam engine. * Pollution and global warming was created. 8. 3. 1. 3 discuss some of the ways in which electricity can be provided in remote locations Use small generators that rotate a coil by a petrol or oil motor. Solar cells and wind generators are also used to convert sunlight and wind into electricity. 8. 3. 2. 1 describe the behaviour of electrostatic charges and the properties of the fields associated with them * Two types of charges positive and negative Charges go away from positive, charges go towards negative * An electrostatic charge is a charge due to an excess or deficiency of electrons. * A body with equal number of protons and electrons will be neutral. * Body has an excess of electron is negatively charged. 8. 3. 2. 2 define the unit of electric charge as the coulomb Electric charge is measured in coulombs the coulomb (c) is the SI unit of electric charge. 1 coulomb = 1c = 6. 25 x10^18 charge = 1. 6 x10^19 charge 8. 3. 2. 3 define the electric field as a field of force with a field strength equal to the force per unit charge at that point: E=FqE = magnitude of electric field (NC-1) Newton per coulomb q = charge (C) coulombs F = force (N) Newton 8. 3. 2. 4 define electric current as the rate at which charge flows (coulombs/ second or amperes) under the influence of an electric field Current is the rate at which charge flows (Csec. or Amperes) un der the influence of an electric field. I= QT I = current Q= charge (coulombs) T= time (sec) 8. 3. 2. 5 identify that current can be either direct with the net flow of charge carriers moving in one direction or alternating with the charge carriers moving backwards and forwards periodically DC = direct currentCharge moves in one direction Direct positive to negative movement AC = alternating current Charge moves back and forth periodically. Directions changes 50 times per second. 8. 3. 2. 6 describe electric potential difference (voltage) between two points as the change in potential energy per unit charge moving from one point to the other (joules/coulomb or volts) Electric potential difference (Voltage) between two points is the change in potential energy per unit charge moving from one point to another (joules/coulomb or Volts). . 3. 2. 7 discuss how potential difference changes between different points around a DC circuit Potential difference can vary at different points around a circuit for example there will be different voltage drops across various resistors, light globes and rheostats which would be different to the voltage rise across the power pack. 8. 3. 2. 8 identify the difference between conductors and insulators Insulators will not allow electricity to flow through them because they have a very high resistance.Conductors have a very low resistance and therefore will allow current to flow through them. 8. 3. 2. 9 define resistance as the ratio of voltage to current for a particular conductor: V=IR V= Voltage I= Current in amps R= Resistance in ohms 8. 3. 2. 10 describe qualitatively how each of the following affects the movement of electricity through a conductor: Length: Resistance is proportional to length; the longer a conductor the greater the resistance Cross sectional area: larger the cross-section the lower the resistance.Temperature: temperature increases ions vibrate increasing resistance. Material: material of a conductor influences resi stance; copper is commonly used for household wiring, gold or silver used when minimal resistance required. 8. 3. 3. 1 identify the difference between series and parallel circuits Series: * There is only one current pathway. * Current is the same throughout the whole circuit * If a series circuit is broken at any point then the electricity cannot flow through it. * Current remains constant and voltage varies (VT=V1+V2+V3).Parallel: * There is more then one current pathway. * All components have the same potential difference across them * In parallel, voltage remains constant and current varies (IT=I1+I2+I3). 8. 3. 3. 2 compare parallel and series circuits in terms of voltage across components and current through them Parallel| Series| VT= V1 = V2 = V3| VT= V1 + V2 + V3| IT=I1 + I2 + I3| IT=I1 = I2 = I3| 8. 3. 3. 3 identify uses of ammeters and voltmeters Ammeters measure the flow of electrons through a point in the circuit.Voltmeters measure the potential difference between two poin ts. 8. 3. 3. 4 explain why ammeters and voltmeters are connected differently in a circuit Ammeter: cannot change the current being measured, must have minimum resistance, current must flow through the ammeter, MUST BE PLACED IN SERIES Voltmeter: measure the penitential difference (voltage) between two points in a circuit, PLACED IN PARALLEL CURCUITS, important that voltmeter has high resistance so that there is not affect on the circuit. 8. 3. 3. explain why there are different circuits for lighting, heating and other appliances in a house In a house there are separate circuits for lighting, heating and other appliances so that appliances that require large amounts of current can still function without over-loading the circuit. If everything was on one circuit there would be too much current used and the wires would become hot and potentially cause a fire. 8. 3. 4. 1 explain that power is the rate at which energy is transformed from one form to another Power is defined as the rate a t which energy is transformed from one form to another. watt=1 W=1J/s 1kW=1000watts P=ET Power ((Joules = watts (W)) = Energy (J) / time (s) 8. 3. 4. 2 identify the relationship between power, potential difference and current Power is the number of joules per second (watts), for every current (I in Amps), Voltage (v in volts) are dissipated. P=VI Power (Watts) = Voltage (V) x Current (A) 8. 3. 4. 3 identify that the total amount of energy used depends on the length of time the current is flowing and can be calculated using: Energy=VIt Electrical energy (joules) = Voltage (volts) x Current (amps) x Time (sec) P=VIPower (Watts) = Voltage (V) x Current (A) P=ET Power ((Joules = watts (W)) = Energy (J) / time (s) 8. 3. 4. 4 explain why the kilowatt-hour is used to measure electrical energy consumption rather than the joule 1kW. h is the energy used by a 1 kW appliance operating for 1 hour. Measuring in joule is a big inconvenient because 1 joule is a very tiny amount of energy. 8. 3. 5. 1 describe the behaviour of the magnetic poles of bar magnets when they are brought close together Magnets have 2 different poles north and south. They can either be attract or repel each other.Opposite poles attract, same poles repel. 8. 3. 5. 2 define the direction of the magnetic field at a point as the direction of force on a very small north magnetic pole when placed at that point The direction of a magnetic field is the direction of force on a very small magnetic north pole placed in the field. The currents from the north pole more towards to the south pole. 8. 3. 5. 3 describe the magnetic field around pairs of magnetic poles Field lines come out of the North and into the south. Field lines never cross. The magnitude of the field is indicated by the density of the field lines. . 3. 5. 4 describe the production of a magnetic field by an electric current in a straight current-carrying conductor and describe how the right hand grip rule can determine the direction of current an d field lines The direction of the magnetic field is described by the right hand rule. Right hand grip rule: Grip wire with right hand, thumb pointing in direction of conventional current, fingers will curl around in the direction of the magnetic field. 8. 3. 5. 5 compare the nature and generation of magnetic fields by solenoids and a bar magnet * A solenoid is a coil of wire. When a current flows in the solenoid it produces a magnetic field around the coil which is similar to that of a bar magnet. * In a solenoid the field continues through the middle as parallel lines. * The direction of the magnetic field inside a solenoid is given by the right hand rule. 8. 3. 6. 1 discuss the dangers of an electric shock from both a 240 volt AC mains supply and various DC voltages, from appliances, on the muscles of the body * The neuromuscular system runs on the movement of electrical changes. An electric current through the body has the effect to disrupt its normal function. A typical respons e of your body’s muscles to an electric shock would be: * Muscles contract so you won’t be able to let go. * Muscles controlling the diaphragm cause it to clamp (can’t breathe) * Heart muscle goes into fibrillation (stops effective beating till heart stops altogether) * Death * Human bodies can withstand ten times as much DC current as AC, AC operates on frequency (50-60 Hz) which is the same frequency our heart operates making AC significantly more lethal than DC. 50-100 mA are the lethal limits for electric shock. 8. 3. 6. describe the functions of circuit breakers, fuses, earthing, double insulation and other safety devices in the home Circuit breakers: they use an electromagnet to mechanically break the circuit. Once the current exceeds the maximum value. Fuses: they prevent overloading of circuits. They are made of a metal with a low melting point. They melt when the current through the circuit exceeds the wiring. They are usually contained in high melting point materials to avoid fires. Earthing: they protect from shock. If an appliance has any metal exposes than it will have the outer cover earthed to protect shock.It works on the bases that there is less resistance through the wire rather than through a person. Double insulation: house hold wiring must be covered by an insulator. Usually made of plastic ((polyvinylchloride, (PVC)) many have double insulating in case the inner insulation melts when the metal gets to hot. 8. 4. 1. 1 identify that a typical journey involves speed changes In a typical car journey, a car may travel at different speeds, accelerate and decelerate, changes direction and stops therefore although there is an average speed for the entire journey, the vehicle does not travel at a constant speed. . 4. 1. 2 distinguish between scalar and vector quantities in equations Scalar quantities are those that specify size (magnitude), but not direction. Vector quantities are defined by both size (magnitude) and direction . Vectors| Scalar| Force| Mass| Velocity| Speed| Displacement| Distance| Acceleration| Work| Momentum| Energy| Magnetic Fields| Power| Electric Fields| Time| 8. 4. 1. 3 compare instantaneous and average speed with instantaneous and average velocity Average Speed = Distance/Total Time Instantaneous Speed is the speed of an object at a particular instant of time.Velocity (v) is the time rate of change of the displacement. It is a vector; it requires both size and direction. It is speed with a direction. Displacement (s) is distance in a given direction. Instantaneous velocity is the velocity at a particular instant, the speed and the direction. Average Velocity is displacement/time. 8. 4. 1. 4 define average velocity as: vav= ? r? t r = s = displacement. Average velocity= change in displacement/ change in time. 8. 4. 2. 1 describe the motion of one body relative to another Motion occurs when an object changes its position relative to other or some co-ordinate system (a frame of refere nce).If a change in direction occurs thorough vector qualities, must be dealt with as vectors. 8. 4. 2. 2 identify the usefulness of using vector diagrams to assist solving problems Vectors qualities have magnitude and direction. Adding Vectors Draw the first vector. Draw the second vector starting from the end of the first. The resultant vector is the line joining the beginning of the first vector to the end of the second. 6km 8km 10km a 6km 8km 10km a Subtracting Vectors V1 – V2 = Change in VChange V = V (f) – V (i) V1 -V2 V1 – V2 V1 -V2 V1 – V2 Change = Final – Initial Change V 8-(-10) = 18 -10m/s 8m/s -10m/s m/s 8. 4. 2. 3 explain the need for a net external force to act in order to change the velocity of an object Forces can internal or external to a system but only the external forces can affect the motion of the system. Net force = sum of all forces. Change in velocity the object must accelerate. An object will remain in constant motion (res t or 0 velocity) unless an unbalanced force acts on the object. To accelerate there must be an outside force acting (Newton’s 1st law). Newton’s first law states that: A body continues in its state of rest or uniform velocity unless acted upon by an unbalanced force. . 4. 2. 4 describe the actions that must be taken for a vehicle to change direction, speed up and slow down Acceleration is defined as the time rate of change of velocity. Acceleration refers to: Speeding Up: this can be done by using the accelerator Slowing Down: this can be done by using the cars brakes Changing Direction: Using the steering wheel 8. 4. 2. 5 describe the typical effects of external forces on bodies including: Friction between surfaces Air resistance There are a number of external forces working on a car and these include: Friction with the Road Air Resistance The weight of the carFriction is a force that we encounter everyday in everything we do. Friction is a force that always opposes m otion. Friction arises when two different materials are in contact with each other. The tires make contact with the road surface and as a result there is friction. This means that the vehicle has traction and does not simply slide. Air Resistance is a form of Friction. As a vehicle moves through the air the two materials, the vehicles body and the air, move past each other. Air resistance limits the speed of the vehicle but it can be minimized by designing a vehicle so that it is aerodynamically shaped. . 4. 2. 6 define average acceleration as: vav= ? r? t therefore vav=v-ut Acceleration is a change in velocity over a certain time period. It can be positive or negative. v= final velocity, u= initial velocity, t= time taken 8. 4. 2. 7 define the terms ‘mass’ and ‘weight’ with reference to the effects of gravity Mass: Is the measure of the amount of matter in an object Measure of inertia (resistance to acceleration) Independent or the effects of gravity Measu red in grams. Weight Is the force of gravity on an object. On earth weight is the mass x 9. 8 Dependent on the amount of massMeasure of the gravity and force on an object Measured in Newton’s. 8. 4. 2. 8 outline the forces involved in causing a change in the velocity of a vehicle when: Coasting with no pressure on the accelerator Friction with the Road Air Resistance Force Pushing car along Pressing on the accelerator The driver is supplying more fuel to the engine. This allows the engine to apply a greater force on the wheels and hence make the car speed up. Velocity and acceleration acting in the same direction. Pressing on the brakes Increasing the friction between the brake pads and the metal discs making it harder for the wheels to turn.Velocity and Acceleration acting in different directions. Passing over an icy patch on the road There is less friction and the wheels can’t get as much grip so they may slide. The car will move at a constant velocity until acted up on by an external force. Climbing and descending hills Friction Air Resistance The cars weight causes it to slow down when going up the hill and speed up when going down the hill Following a curve in the road Centripetal force is causing the car to accelerate as the velocity is changing owing to the change in direction. 8. 4. 2. interpret Newton’s Second Law of Motion and relate it to the equation: F=ma F= Force in Newtons m= mass a= acceleration 8. 4. 2. 10 identify the net force in a wide variety of situations involving modes of transport and explain the consequences of the application of that net force in terms of Newton’s Second Law of Motion The acceleration of an object is proportional to the unbalanced force acting on it and is inversely proportional to the mass. The consequences of net external force acting on a model of transport are acceleration, deceleration and a change of direction in motion.Centripetal force (circular motion) The force causing the turning is always towards the centre of the circle. Force (centripetal) = mv^2/ R R=radius, V= instantaneous velocity, M= mass 8. 4. 3. 1 identify that a moving object possesses kinetic energy and that work done on that object can increase that energy Kinetic Energy is the energy an object possesses because it is moving. Kinetic energy is dependent on the mass and the square of the velocity of the body as indicated by: KE=12mv2 E= kinetic energy (joules) M=mass of the object (kg) V=velocity (m/s)Work (W) is done when a force (F) is moved through a distance (s). Work is the product of a force and the distance moved in the direction of that force. W=Fs. Work transfers energy through the motion of a force. When work is done, energy is required. W = Change in Kinetic energy 8. 4. 3. 2 describe the energy transformations that occur in collisions In collisions objects exert forces on each other. Collisions can be either: Elastic Non-Elastic Elastic Collisions If in a collision, kinetic energy is conserved, the collision is said to be elastic.An example would be when Gas molecules collide with each other and with the walls of their container as kinetic energy is not decreased. Inelastic Collisions In inelastic collisions, kinetic energy is not conserved. Some of the Kinetic energy is transformed into other forms of energy such as heat and sound. If the colliding parts stick together, the collision is inelastic 8. 4. 3. 3 define the law of conservation of energy In all types of interactions, both elastic and inelastic, total energy is conserved. Energy cannot be destroyed only can be changed from one form to another. . 4. 4. 1 define momentum as: p=mv Momentum= mass (kg) x velocity (m/s) Unit of momentum= kilogram-meter/sec To stop a moving object, forces must be applied and the forces relate to two factors, the mass of the object and the velocity of the object. The time rate of change of momentum is proportional to the resultant force and acts in the direction of the force. Always conserved Vector quantity 8. 4. 4. 2 define impulse as the product of force and time Impulse = F (force) x t (time) Impulse = change in momentum Impulse = Ft = mv – mu mv = final momentum u = initial momentum The unit of Impulse is N. s which is the same as the Unit of momentum= kilogram-meter/sec (kg. m/sec) 8. 4. 4. 3 explain why momentum is conserved in collisions in terms of Newton’s Third Law of motion Force (action) = Force (reaction) Conservation of Momentum The total momentum of a system is always the same unless the system on by some external force. P (before) = P (after) m1u1+m2u2= m1v1+m2v2 This equation shows that: the vector sum of the momentum of the objects before collision equals the vector sum of the momentum after collision.Momentum is conserved only in isolated systems (those free from external forces). The Law of the Conservation of Momentum can be stated as: In interactions between objects, momentum is conserved in an isolated system. 8. 4. 5. 1 define the inertia of a vehicle as its tendency to remain in uniform motion or at rest Newton’s 1st law: Inertia: â€Å"Tendency of any object to resist any change in motion. † E. g. when a car stops suddenly, the objects and people in the car remain in the current motion unless acted upon by an external force such as a seatbelt. 8. 4. 5. discuss reasons why Newton’s First Law of Motion is not apparent in many real world situations Common experience is not apparent in Real World Situations as the driver of a car still needs to depress the accelerator to move at a constant rate because of friction between the car and the road. 8. 4. 5. 3 assess the reasons for the introduction of low speed zones in built-up areas and the addition of air bags and crumple zones to vehicles with respect to the concepts of impulse and momentum Introduced low speed zones into built areas to reduce the speed of drivers as the faster you are moving the more damage you do in a coll ision.Crumple Zones were introduced so that the front and rear end of the car should crumple in a collision which increases the time it takes for the car to come to rest so the forces are lessened. Air Bags were introduced which provide a cushion and takes the impact out of a collision. 8. 4. 5. 4 evaluate the effectiveness of some safety features of motor vehicles Seat Belts They are effective in limiting the effect of inertia when a vehicle breaks suddenly. It absorbs a lot of the force of a collision. Airbags Air Bags were introduced which provide a cushion and takes the impact out of a collision.Crumple Zones Crumple Zones were introduced so that the front and rear end of the car should crumple in a collision which increases the time it takes for the car to come to rest so the forces are lessened. 8. 5. 1. 1 outline the historical development of models of the Universe from the time of Aristotle to the time of Newton Plato| planets move in spherical orbits around the earth (geoce ntric) | Eudoxus| maintained Plato’s concepts of spherical motions, complex arrangements of circular motions| Aristotle| developed Eudoxus model to 53 spheres. |Aristarchus| The sun is in the centre (heliocentric) with everything orbiting around it and epicycle moments to explain planetary movements; Earth must rotate on its axis, so it appears that everything moves around us. | Ptolemy| believed in geocentric universe, stars existed on a sphere which rotated every 24 hours, earth is a sphere and at rest, motion of sun and plants moved in perfect circles. | Copernicus| heliocentric universe, sun was the centre and planets orbited the sun in fixed circular motions, earth traveled around the sun in 1 year and spins on its axis every 24 hours. Galileo| first to use a telescope, supported the heliocentric idea of Copernicus, worked on gravitational theory disproved Aristotle concepts of the motion. | Sir Isaac Newton| from work on motion realized that a forcer must be acting on a n object such as the moon, law of universal gravitation, this explain where things stayed in orbit, since the time of Newton the heliocentric model was accepted. | 8. 5. 2. 1 outline the discovery of the expansion of the Universe by Hubble, following its earlier prediction by Friedmann Alexander Friedman predicted that the universe was expanding.The predictions rose from calculations based on Einstein’s, general theory of relativity. Edwin Hubble designed a new and a bigger telescope that leads to the discovery of the red shift proving that the universe is expanding. A red shift corresponds to a shift to the lower frequency (longer wavelength). This indicates that the light source, the galaxy is moving away from us. All galaxies show this effect indicating that the universe is expanding. 8. 5. 2. 2 describe the transformation of radiation into matter which followed the ‘Big Bang’ After the temperature had dropped enough.The energy began to be converted in to matt er. Hydrogen atoms formed from protons and electrons. 8. 5. 2. 3 identify that Einstein described the equivalence of energy and mass E=mc2 E= energy (Joules) m= mass (kg) c= speed of light (3 x 108 ms-1) 8. 5. 2. 4 outline how the accretion of galaxies and stars occurred through: Expansion and cooling of the Universe The cooling of the universe allowed the formation of matter. This began to overwhelm the radiation Subsequent loss of particle kinetic energyAs the temperature fell this resulted in a loss of kinetic energy (as temperature is the measure of average kinetic energy of the particles) Gravitational attraction between particles Loss in Kinetic energy meant that the increased gravitational force between particles took effect Lumpiness of the gas cloud that then allows gravitational collapse The greater density of areas of the gas clouds allowed gravity to begin 8. 5. 3. 1 define the relationship between the temperature of a body and the dominant wavelength of the radiation em itted from that body The hotter the star the shorter the wave length.Hot star: short wave length, more energy. Cold star: long wave length, less energy 8. 5. 3. 2 identify that the surface temperature of a star is related to its colour Red | Long wavelength| Orange| | Yellow | | White blue- white| Short wavelength| The hotter the star gets the more it will shift towards the blue end of the spectrum and thus the shorter the wavelength. 8. 5. 3. 3 describe a Hertzsprung-Russell diagram as the graph of a star’s luminosity against its colour or surface temperature In the Hertzsprung-Russell diagram a stars surface temperature and luminosity (brightness) are plotted against each other.This is because there is a relationship between the two. 8. 5. 3. 4 identify energy sources characteristic of each star group, including Main Sequence, red giants, and white dwarfs Star group| Fuel| Characteristics| Main sequence| H then He| They are from the top left of the Hertzsprung-Russell diagr am to the bottom right. This shows a trend of hot and bright to cold and dull| Red giants| H then He| In the upper right corner of the Hertzsprung-Russell diagram and are bright but cold| White dwarfs| C and O ions| Bottom left of the Hertzsprung-Russell diagram. They are very hot but dim and small. 8. 5. 4. 1 identify that energy may be released from the nuclei of atoms Light atoms like H will fuse together at extreme temperatures to for stable atoms. This produces energy. Uranium on the other hand has very unstable nuclei and will break down by emitting energy or partials randomly. That may be in the form of ? , ? or gamma rays. 8. 5. 4. 2 describe the nature of emissions from the nuclei of atoms as radiation of alpha ? and beta ? particles and gamma ? rays in terms of: ionising power penetrating power effect of magnetic field effect of electric fieldRadiation| Ionizing power| Penetrating Power| Effect of Magnetic Field| Effect of Electric Field| Alpha Particle| Very high Strong| Low a few cm in the air| Affected according to right hand palm rule| Limited – very small| Beta Particle| Less than AlphaWeak| Higher than Alpha thin sheets of lead| Large| Large| Gamma Ray| Less than BetaVery Weak| Very High Several cm of lead| Zero| Zero| 8. 5. 4. 3 identify the nature of emissions reaching the Earth from the Sun Solar wind consists of a stream of ionised particles, mostly protons and electrons that flow from the sun in all directions at speeds of about 400 km. -1. The source of the wind is the sun’s hot corona – the outer atmosphere of the sun extending a distance of a few solar radii into space. Most of the corona consists of vast arches of hot gas – solar flares – that are millions of kilometres in length and are caused by the sun’s magnetic field. The Solar wind comes from regions called coronal holes, regions of cooler, less dense gas. As the sun rotates there is a periodic variation in Solar wind activity every 27 da ys. The Solar wind is responsible for pushing the tail of comets away from the sun. 8. 5. 4. 4 describe the particulate nature of solar windSunspot cycle is a pattern of increasing and decreasing sunspots. Sun spots are a dark spot on the sun with lower temperatures and intense magnetic activity. Cycle is between 7-13 years. Two types of emission reaching Earth from the sun: electromagnetic radiation and solar winds. Earth’s atmosphere and magnetic field shelters as from theses emissions. The sunspots themselves last for several days although larger ones may last up to a few weeks. The number of particles and their velocity increases following sunspot activity and solar flares meaning that the solar wind is greater in the time of maximum sunspots. . 5. 4. 5 describe sunspots as representing regions of strong magnetic activity and lower temperature Sunspots are relatively cool areas (~4500K), with magnetic field strengths some thousands of times stronger than the Earth’ s magnetic field, that appear as dark imperfections in the photosphere. They result from the penetration of magnetic field lines through the photosphere and are ~8000km across. Except for the smaller ones, all sunspots have a dark inner region – the umbra – where the magnetic field is strongest surrounded by a less dark region – the penumbra – where the magnetic field is weakest.

Psychology Of Adjustment Essay

When a person hears the term psychotherapy, images of a white padded room and a person wearing a straightjacket immediately enter the mind. Psychotherapy was at one time in the history of mental health, taken to mean that a person has lost control of his mental faculties and now requires severe medical treatments such as shock therapy, Indeed, there was a time when psychotherapy was not something that a person would willingly undertake. These days though, the medical field of mental health that covers psychotherapy has come to be recognized as something that helps anybody, not just a mentally unbalanced person, deal with life. In effect, it has become a field synonymous with helping a person learn how to cope with his life and the problems besieging him.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   In real life, basic psychotherapy is what we seek when we have problems and we turn to our friends and family for advice. The need to unload and seek the help of another person in analyzing situations is the way we cope with problems. By seeing things from another persons perspective, we gain a better handle on the situation and its relating situations or topics. Although, there are instances when problems become so severe that family or friendly intervention can no longer help the person cope. In such instances, it is important for a person to seek professional help either on his own volition or through intervention techniques.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   It is not hard to find the necessary psychological help once a person has acknowledged his need for professional intervention. There are psychologists in both private and public practice who are available to help. They can be found in community centers, hospitals, and sometimes, even among the religious.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Since the psychology practitioners range from psychiatrists, psychologists, psychiatric social workers, counselors, and paraprofessionals, it is of the utmost importance that a person seeking psychiatric help know which type of mental health professional would be the best choice to approach in order to help him deal with his problem.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   It is important to have a list of requirements when choosing a psychotherapist. Part of the criteria when choosing should include ( a ) insuring that the medical professional you choose is properly qualified and licensed to practice in the state, ( b ) and how that person makes you feel when you are talking to him. Comfortability and trust in the psychotherapist is of the utmost importance because this is a person whom you shall be entrusting your deepest and most private thoughts to. He or she will need to display a genuine concern for your welfare and actually listen to you in order to give you proper advise or analysis of your problems. This person’s professional characteristics, professional experience, and skills can spell the difference between his ability to help and a continuing downward spiral into darkness.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Remember, a person seeks psychotherapy in an effort to understand what he is going through and why. The help given by the psychotherapist can range from emotional support, medication, and sometimes, a lifestyle change. The important thing is for the person concerned to be he involved in his own welfare and recognize and accept that he has problems that require professional help in order to for him to properly deal with it.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   There is no real set time for the completion of a psychiatric treatment. Usually though, therapy can be ended once the person has gained control of the situation or problem and no longer poses a danger to himself and to others. Provided the person already knows and understands why he is going through certain difficulties in life, and he is capable of controlling the situation on his own, it will be safe to either end the treatment or continue it on an intermittent basis. It all really depends upon the patient and his needs.