Sunday, August 2, 2009

Gold

Gold, symbol Au (from Latin aurum, “gold”), soft, dense, bright yellow metallic element. Gold is one of the transition elements of the periodic table; its atomic number is 79. Pure gold is the most malleable and ductile of all the metals. It can easily be beaten or hammered to a thickness of 0.000013 cm (0.000005 in), and 29 g (1.02 oz) could be drawn into a wire 100 km (62 mi) long. It is one of the softest metals (hardness, 2.5 to 3) and is a good conductor of heat and electricity. Gold is bright yellow and has a high luster. Finely divided gold, like other metallic powders, is black; colloidally suspended gold ranges in color from ruby red to purple
Gold is extremely inactive. It is unaffected by air, heat, moisture, and most solvents. It will, however, dissolve in aqueous mixtures containing various halogens such as chlorides, bromides, or some iodides. It will also dissolve in some oxidizing mixtures, such as cyanide ion with oxygen, and in aqua regia, a mixture of hydrochloric and nitric acids. The chlorides and cyanides are important compounds of gold. Gold melts at about 1064° C (about 1947° F), boils at about 2808° C (about 5086° F), and has a specific gravity of 19.3; its atomic weight is 196.97.

Diamond

Diamond, mineral form of the element carbon, valued as a precious stone. Diamond is the hardest natural mineral and has many other exceptional properties that collectively make it an important industrial and scientific material. Unique geologically, diamonds form at great depths within Earth and are typically billions of years old.
Diamonds are crystals composed of pure carbon. In nature, diamond crystallizes from hot carbon-rich fluids. This crystallization requires tremendous heat and pressure—1000 to 1200°C (1800 to 2200°F) of heat and 50 kilobars of pressure. (One bar is based on the pressure the atmosphere exerts at sea level, about 1.02 kg per sq cm, or 14.7 lb per sq in; 50 kilobars is 50,000 bars.) The pressures and temperatures at which natural diamond forms only occur deep underground. Scientists believe that diamonds form at depths greater than 150 km (93 mi), and there is evidence that some diamonds formed as deep as 670 km (420 mi) beneath Earth’s surface.

Dollar

Dollar, name of various coins and paper money formerly or currently in use in parts of Europe, Africa, Asia, Oceania, and the western hemisphere. It is the standard value, or unit of account, in the monetary systems of Canada and the United States. The word dollar comes from the old German Daler or Taler, an abbreviation of joachimsthaler, the name of a silver coin, imprinted with an effigy of St. Joachim, which was first struck (1519) in what is now Germany. Later, a large milled-edged silver coin called peso duro (hard dollar as it is known in English) was minted in Spain and widely used in the Spanish and English colonies of the New World.

Euro

Euro, monetary unit of the European Union (EU). On January 1, 2002, euro-denominated coins and bills went into circulation in 12 of the 15 EU member states—Austria, Belgium, Finland, France, Germany, Greece, Italy, Ireland, Luxembourg, The Netherlands, Spain, and Portugal. The euro replaced the currencies of these nations.

The adoption of the euro was the final step in the EU’s plan for Economic and Monetary Union (EMU). EMU was designed to establish a single currency and a single monetary authority for EU member states, and was an integral part of the 1991 Maastricht Treaty that founded the EU. In order to make the euro a stable currency, the EU set stringent economic criteria that member countries had to meet before they could adopt the euro. These criteria dealt with things such as levels of inflation, amount of budget deficit and government debt, and stability of the existing national currency.

On January 1, 1999, the euro went into use for accounting purposes and electronic fund transfers in 11 participating EU member states. Greece, the 12th participating member, did not officially adopt the euro until January 1, 2001. Between 1999 and 2002, the euro coexisted with the currencies of the participating states. Starting in 2002 euro notes and coins became legal tender and entered circulation in the 12 states. The member states’ old currencies were to remain legal tender until the end of February 2002, when all monetary transactions were to be conducted in euros.

The bank of issue for the euro is the European Central Bank (ECB), which was established in June 1998 and began operation on January 1, 1999. The ECB, located in Frankfurt, Germany, has total control over all EU monetary policies, including setting interest rates and regulating the money supply.

The euro is divided into 100 cents. Euro notes are issued in denominations of 5, 10, 20, 50, 100, 200, and 500 euros. Coins are issued in denominations of 1, 2, 5, 10, 20, and 50 cents, and 1 and 2 euros. Although bills are identical in all countries, each country issues its own coins, which have a common design on one side and a national design or emblem from the country of issue on the other.

Geography

Geography, science that deals with the distribution and arrangement of all elements of the earth's surface. The word geography was adopted in the 200s bc by the Greek scholar Eratosthenes and means “earth description.” Geographic study encompasses the environment of the earth's surface and the relationship of humans to this environment, which includes both physical and cultural geographic features. Physical geographic features include the climate, land and water, and plant and animal life. Cultural geographic features include artificial entities, such as nations, settlements, lines of communication, transportation, buildings, and other modifications of the physical geographic environment. Geographers use economics, history, biology, geology, and mathematics in their studies.

Geography may be divided into two fundamental branches: systematic and regional geography. Systematic geography is concerned with individual physical and cultural elements of the earth. Regional geography is concerned with various areas of the earth, particularly the unique combinations of physical and cultural features that characterize each region and distinguish one region from another. Because the division is based only on a difference in approach to geographic studies, the two branches are interdependent and are usually applied together. Each branch is divided into several fields that specialize in particular aspects of geography.

Automobile

INTRODUCTION
Automobile, self-propelled vehicle used primarily on public roads but adaptable to other surfaces. Automobiles changed the world during the 20th century, particularly in the United States and other industrialized nations. From the growth of suburbs to the development of elaborate road and highway systems, the so-called horseless carriage has forever altered the modern landscape. The manufacture, sale, and servicing of automobiles have become key elements of industrial economies. But along with greater mobility and job creation, the automobile has brought noise and air pollution, and automobile accidents rank among the leading causes of death and injury throughout the world. But for better or worse, the 1900s can be called the Age of the Automobile, and cars will no doubt continue to shape our culture and economy well into the 21st century.
Automobiles are classified by size, style, number of doors, and intended use. The typical automobile, also called a car, auto, motorcar, and passenger car, has four wheels and can carry up to six people, including a driver. Larger vehicles designed to carry more passengers are called vans, minivans, omnibuses, or buses. Those used to carry cargo are called pickups or trucks, depending on their size and design. Minivans are van-style vehicles built on a passenger car frame that can usually carry up to eight passengers. Sport-utility vehicles, also known as SUVs, are more rugged than passenger cars and are designed for driving in mud or snow.





In 2001 manufacturing plants in more than 35 countries produced 39.5 million passenger cars. About 7.3 million passenger vehicles were produced in North America in 2001. For information on the business of making cars, see Automobile Industry.

The automobile is built around an engine. Various systems supply the engine with fuel, cool it during operation, lubricate its moving parts, and remove exhaust gases it creates. The engine produces mechanical power that is transmitted to the automobile’s wheels through a drivetrain, which includes a transmission, one or more driveshafts, a differential gear, and axles. Suspension systems, which include springs and shock absorbers, cushion the ride and help protect the vehicle from being damaged by bumps, heavy loads, and other stresses. Wheels and tires support the vehicle on the roadway and, when rotated by powered axles, propel the vehicle forward or backward. Steering and braking systems provide control over direction and speed. An electrical system starts and operates the engine, monitors and controls many aspects of the vehicle’s operation, and powers such components as headlights and radios. Safety features such as bumpers, air bags, and seat belts help protect occupants in an accident.

Automobile Industry

INTRODUCTION
Automobile Industry, industry that produces automobiles and other gasoline-powered vehicles, such as buses, trucks, and motorcycles. The automobile industry is one of the most important industries in the world, affecting not only the economy but also the cultures of the world. It provides jobs for millions of people, generates billions of dollars in worldwide revenues, and provides the basis for a multitude of related service and support industries. Automobiles revolutionized transportation in the 20th century, changing forever the way people live, travel, and do business.

The automobile has enabled people to travel and transport goods farther and faster, and has opened wider market areas for business and commerce. The auto industry has also reduced the overall cost of transportation by using methods such as mass production (making several products at once, rather than one at a time), mass marketing (selling products nationally rather than locally), and globalization of production (assembling products with parts made worldwide). Between 1886 and 1898, about 300 automobiles were built, but there was no real established industry. A century later, with automakers and auto buyers expanding globally, automaking became the world's largest manufacturing activity, with nearly 58 million new vehicles built each year worldwide.

As a result of easier and faster transportation, the United States and world economies have become dependent on the mobility that automobiles, trucks, and buses provide. This mobility allowed remote populations to interact with one another, which increased commerce. The transportation of goods to consumers and consumers to goods has become an industry in itself. The automobile has also brought related problems, such as air pollution, congested traffic, and highway fatalities. Nevertheless, the automobile industry continues to be an important source of employment and transportation for millions of people worldwide.

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HOW CARS ARE BUILT

Making a car involves several major decisions about the design of the car, how it will be built, and how it will be sold. Managers must also coordinate factory production, purchase materials, and train workers—all within a budget. Marketing teams must then sell the car and project returns on shareholder investments. New models are introduced yearly, but a single car design can take several years to get from the drawing board to the showroom floor. A typical company will therefore have several new designs in various stages of development at any given time.

The group within an automobile company that makes the main decisions about new cars often includes the chairman of the board and board members, the president, the marketing director, the sales director, the finance director, and the head of product development. These leaders must budget money, recruit a workforce, and set realistic deadlines. Rather than sending ideas from step to step as they are completed, leaders collaborate from the start with designers and engineers in a process known as simultaneous engineering to increase the speed and efficiency of car production. Engineering, manufacturing, sales, and other specialized departments in turn support the leadership decisions. Most of these positions require college degrees and extensive training. Companies also rely on the administrative services of clerks, typists, telephone operators, and others to support the process of automaking.

Research, Design, and Development:
Before a new car is built, it must be researched, designed, and developed into a workable product. Researchers analyze market trends, consumer surveys, and buying patterns to determine what consumers want, and then suggest what kinds of cars to make. Designers work to shape these new ideas into tangible parts or products. Engineers adapt existing parts for the new model and draw up new plans for the prototype. A prototype is a custom-built working example of a new design. Manufacturers begin by building a few prototypes before they set up a factory to build the new car. Product planners monitor the process along the way and make sure that an approved new car program finishes on time and within budget.

As technology advances, new cars continually feature new systems and innovations. Change and innovation in the auto industry take time to implement and must allow for, but not be overwhelmed by, consumer whims or government regulations. New systems are usually introduced one at a time, or new technologies applied to one area at a time. A new component system (such as a new braking system) in a fully developed prototype can take as long as four years to incorporate into a new model. Part of this time is needed to design, build, and install production tools to make the new model. Testing the new system on rough mock-ups (called test beds) and in preproduction vehicles to see what happens to overall performance takes additional time.

Meanwhile, members of the marketing and sales staffs select a name for the new product, conduct surveys to determine what share of the market the new model can anticipate, and troubleshoot potential problems. Initial production targets are set according to available market research results.

Once the board approves the model and name, the first working prototype emerges from experimental workshops. Board members try out the working prototype, then experts take it through extensive tests, including wind tunnel, dust tunnel, factory track, water-proofing bays, desert heat, arctic cold, and crash tests.

Manufacturing and Assembly:
Before a new model can be built, the factory must first be retooled. Retooling a factory involves changing the machines on the factory floor to produce a different style of automobile. Skilled tool makers, pattern makers, and die makers look at the specifications for the new car parts and cooperate with the tool design office to craft the tools and modify, or tool up, the machines.

The purchasing department assures that needed supplies for production are available on time and within budget. Qualified buyers have knowledge of both engineering and accounting, and they are responsible for ordering the raw materials to make the parts in-house or for ordering finished components from a parts supplier.

After raw materials are received and inspected, they are cast, forged, stamped, or molded into different body shapes. Press shop workers operate the machines that stamp steel into body panels. Fiberglass molders and cutters help mold large plastic body parts and cut the rough edges. Paint shop workers and spray gun operators put the final touches on the plastic or steel shell. Since many of these body-making jobs have been or are being automated, there is an increasing need for computer analysts, programmers, and technicians. These computer-oriented positions usually require college degrees or post-high-school training.
Machine operators, who work in all parts of the factory, are particularly important in engine building. They take the rough castings and forgings of the engine parts and machine them to the required tolerances and accuracy. Machine operators need to be skilled, with experience on numerically controlled and computerized machinery. Engine builders put the engine parts together by hand, a job for car mechanics who can quickly understand changes in engine design.

Manufacturing personnel work on the assembly lines and operate numerous machines, computers, robots, and other equipment to produce the items needed for each car. Heat treatment tempers and strengthens the forged and cast parts, which are then shaped into components that are assembled into subassemblies (gearboxes, axles, engines, doors, dashboards). The chassis (the underlying frame of the automobile) and body are joined and painted. Electricians, many of whom are first hired as apprentices or trained in company training programs, make sure that electrical parts are correctly fitted and connected in the car.

Components and subassemblies are gradually combined along the assembly line at different points to construct the car. Line operators generally are less skilled workers who carry out one or two simple assembly line operations. The manufacturer gives these workers limited training. At almost every stage of the assembly process, skilled inspectors assure the quality of the work.

This pattern of production, which emerged from 1900 to 1920, changed little in the first 80 years of the century. Beginning in the late 1970s and early 1980s, manufacturers began buying completed subassemblies instead of their components—completed dashboards, for instance, rather than individual instruments—and began building the auto body around these subassemblies. These and other production strategies have enabled companies to address the fast-changing market more rapidly and effectively. Companies can now change production lines faster and make more specialized cars more economically.

Sales and Service:
Market researchers contribute to the original design process and continue their studies throughout the manufacture and sale of a car. Market researchers compile newspaper, industry, and public reaction from polls and product surveys. They use these findings to help plan sales campaigns. For example, if surveys show consumers like the energy-saving features of a car, then those features might be the focus of advertising. The advertising department uses results from polls and focus groups (small groups of potential consumers) to shape advertising tools for dealers as well as national advertising campaigns aimed directly at the public.

The corporate sales staff works with the car dealers throughout the country to prepare them to sell the new product. Toward the end of the 20th century, the number of dealerships declined, but their size and the number of total cars sold increased. In 1950 about 47,000 dealers sold 7.2 million vehicles. By 1985 half as many dealers sold twice as many cars. High-volume dealers, called megadealers, with multiple locations and multiple franchises (agreements with several companies to sell their cars) compete most favorably. Car supermarkets (establishments that sell used cars at a fixed price, often with a 30-day return policy) and dealerships with separate repair and sales departments are two current trends that are likely to continue. Many car dealerships in the United States also devote a portion of their sales staff to Internet sales. Internet sales associates help potential buyers research and purchase cars online.

Dealership mechanics must learn how to maintain and repair new models. More than 80 percent of the functions of the average automobile are controlled by electronics. This has created a large need for educated mechanics who can also operate computerized diagnostic equipment. The National Institute for Automotive Service Excellence (ASE) was established in 1972 to help consumers select competent service professionals. ASE Certification of mechanics increased from 8,567 in 1972 to more than 400,000 in 2002. Trade and technical schools continue to be the major source of training for service professionals, who work in car dealerships, service stations, tire shops, and elsewhere.

Customer Feedback:
Consumers have increasingly become part of the team that shapes the products that are designed and built—especially since the 1960s and 1970s. The company maintains a press fleet so automotive correspondents can test drive new models and review them. In some companies, top executives also test drive new cars and give their feedback. Focus groups of consumers are organized to test recent innovations to see if they would be suitable to apply across a product line. For example, focus groups of consumers who like off-road operation provided the initial market test of four-wheel drive passenger cars. Other consumer groups have road tested innovations such as fuel injection, turbocharging, and trip computers. After these focus groups give their feedback, designers refine the innovations and introduce them into other vehicles.

CORPORATIONS AND OTHER TYPES OF BUSINESSES

Three major types of firms carry out the production of goods and services in the U.S. economy: sole proprietorships, partnerships, and corporations. In 1995 the U.S. economy included 16.4 million proprietorships, excluding farms; 1.6 million partnerships; and about 4.3 million corporations. The corporations, however, produce far more goods and services than the proprietorships and partnerships combined.

Proprietorships and Partnerships
Sole proprietorships are typically owned and operated by one person or family. The owner is personally responsible for all debts incurred by the business, but the owner gets to keep any profits the firm earns, after paying taxes. The owner’s liability or responsibility for paying debts incurred by the business is considered unlimited. That is, any individual or organization that is owed money by the business can claim all of the business owner’s assets (such as personal savings and belongings), except those protected under bankruptcy laws.

Normally when the person who owns or operates a proprietorship retires or dies, the business is either sold to someone else, or simply closes down after any creditors are paid. Many small retail businesses are operated as sole proprietorships, often by people who also work part-time or even full-time in other jobs. Some farms are operated as sole proprietorships, though today corporations own many of the nation’s farms.

Partnerships are like sole proprietorships except that there are two or more owners who have agreed to divide, in some proportion, the risks taken and the profits earned by the firm. Legally, the partners still face unlimited liability and may have their personal property and savings claimed to pay off the business’s debts. There are fewer partnerships than corporations or sole proprietorships in the United States, but historically partnerships were widely used by certain professionals, such as lawyers, architects, doctors, and dentists. During the 1980s and 1990s, however, the number of partnerships in the U.S. economy has grown far more slowly than the number of sole proprietorships and corporations. Even many of the professions that once operated predominantly as partnerships have found it important to take advantage of the special features of corporations.

Corporations
In the United States a corporation is chartered by one of the 50 states as a legal body. That means it is, in law, a separate entity from its owners, who own shares of stock in the corporation. In the United States, corporate names often end with the abbreviation Inc., which stands for incorporated and refers to the idea that the business is a separate legal body.

Limited Liability
The key feature of corporations is limited liability. Unlike proprietorships and partnerships, the owners of a corporation are not personally responsible for any debts of the business. The only thing stockholders risk by investing in a corporation is what they have paid for their ownership shares, or stocks. Those who are owed money by the corporation cannot claim stockholders’ savings and other personal assets, even if the corporation goes into bankruptcy. Instead, the corporation is a separate legal entity, with the right to enter into contracts, to sue or be sued, and to continue to operate as long as it is profitable, which could be hundreds of years.

When the stockholders who own the corporation die, their stock is part of their estate and will be inherited by new owners. The corporation can go on doing business and usually will, unless the corporation is a small, closely held firm that is operated by one or two major stockholders. The largest U.S. corporations often have millions of stockholders, with no one person owning as much as 1 percent of the business. Limited liability and the possibility of operating for hundreds of years make corporations an attractive business structure, especially for large-scale operations where millions or even billions of dollars may be at risk.

When a new corporation is formed, a legal document called a prospectus is prepared to describe what the business will do, as well as who the directors of the corporation and its major investors will be. Those who buy this initial stock offering become the first owners of the corporation, and their investments provide the funds that allow the corporation to begin doing business.

IMPACT OF THE WORLD ECONOMY

Today, virtually every country in the world is affected by what happens in other countries. Some of these effects are a result of political events, such as the overthrow of one government in favor of another. But a great deal of the interdependence among the nations is economic in nature, based on the production and trading of goods and services.

One of the most rapidly growing and changing sectors of the U.S. economy involves trade with other nations. In recent decades, the level of goods and services imported from other countries by U.S. consumers, businesses, and government agencies has increased dramatically. But so, too, has the level of U.S. goods and services sold as exports to consumers, businesses, and government agencies in other nations. This international trade and the policies that encourage or restrict the growth of imports and exports have wide-ranging effects on the U.S. economy.

As the nation with the world’s largest economy, the United States plays a key role on the international political and economic stages. The United States is also the largest trading nation in the world, exporting and importing more goods and services than any other country.
Some people worry that extensive levels of international trade may have hurt the U.S. economy, and U.S. workers in particular. But while some firms and workers have been hurt by international competition, in general economists view international trade like any other kind of voluntary trade: Both parties can gain, and usually do. International trade increases the total level of production and consumption in the world, lowers the costs of production and prices that consumers pay, and increases standards of living. How does that happen?

All over the world, people specialize in producing particular goods and services, then trade with others to get all of the other goods and services they can afford to buy and consume. It is far more efficient for some people to be lawyers and other people doctors, butchers, bakers, and teachers than it is for each person to try to make or do all of the things he or she consumes.

In earlier centuries, the majority of trade took place between individuals living in the same town or city. Later, as transportation and communications networks improved, individuals began to trade more frequently with people in other places. The industrial revolution that began in the 18th century greatly increased the volume of goods that could be shipped to other cities and regions, and eventually to other nations. As people became more prosperous, they also traveled more to other countries and began to demand the new products they encountered during their travels.

The basic motivation and benefits of international trade are actually no different from those that lead to trade within a nation. But international trade differs from trade within a nation in two major ways. First, international trade involves at least two national currencies, which must usually be exchanged before goods and services can be imported or exported. Second, nations sometimes impose barriers on international trade that they do not impose on trade that occurs entirely inside their own country.