999 résultats pour "between"

• Soccer.

  Two assistants, known as linesmen or referees’ assistants, aid the referee. Their primary job is to alert the referee when balls go out of the playing area and to assist inmaking offsides calls (see Rules section below). The assistants carry flags, which they wave when the ball leaves the playing area or use to point to the spot where a foul was committed. V EQUIPMENT Soccer is played with a round leather ball. It is between 68 and 71 cm (27 and 28 in) in circumference and weighs between 396...

• Guatemala - country.

  C Climate The climate of Guatemala varies according to elevation, from hot coastal plains to cold mountain heights. Most of the population lives between 900 and 2,400 m (3,000and 8,000 ft) above sea level, where there are warm days and cool nights with average annual temperatures of 20°C (68°F). The coastal regions are hot and humid,with average annual temperatures of 28°C (83°F). A rainy season, from May through October, is sometimes called “winter” because it brings cloudy afternoons andlower...

• Sun - astronomy.

  A The Sun’s Place in the Milky Way The Milky Way Galaxy contains about 400 billion stars. All of these stars, and the gas and dust between them, are rotating about a galactic center. Stars that arefarther away from the center move at slower speeds and take longer to go around it. The Sun is located in the outer part of the galaxy, at a distance of 2.6 × 10 17 km (1.6 × 10 17 mi) from the center. The Sun, which is moving around the center at a velocity of 220 km/s (140 mi/s), takes 250 million y...

• Quantum Theory I INTRODUCTION Quantum Theory, in physics, description of the particles that make up matter and how they interact with each other and with energy.

  electron in the same way a particle with momentum would: It bumps the electron and changes the electron’s path. The light is also affected by the collision as though itwere a particle, in that its energy and momentum changes. Momentum is a quantity that can be defined for all particles. For light particles, or photons, momentum depends on the frequency, or color, of the photon, which in turndepends on the photon’s energy. The energy of a photon is equal to a constant number, called Planck’s cons...

• Ancient Rome .

  attributed to Numa, including the selection of virgins to be priestesses of the goddess Vesta. He also established a calendar to differentiate between normal workingdays and those festival days sacred to the gods on which no state business was allowed. His peaceful reign lasted from 715 to 673 BC. Under Tullus Hostilius (672–641 BC) the Romans waged an aggressive foreign policy and began to expand their lands by the conquest of nearby cities like Alba Longa. When the warlike King Hostilius co...

• Ancient Rome - USA History.

  attributed to Numa, including the selection of virgins to be priestesses of the goddess Vesta. He also established a calendar to differentiate between normal workingdays and those festival days sacred to the gods on which no state business was allowed. His peaceful reign lasted from 715 to 673 BC. Under Tullus Hostilius (672–641 BC) the Romans waged an aggressive foreign policy and began to expand their lands by the conquest of nearby cities like Alba Longa. When the warlike King Hostilius co...

• Pioneer (spacecraft) - astronomy.

  The Pioneer Venus spacecraft contributed a tremendous amount of new information about Venus. Venus showed an enormous difference between night (-170°C, or -274°F) and day (40°C, or 104°F) temperatures in the highest regions of the atmosphere (the thermosphere during the day and the cryosphere at night) at altitudesbetween 130 and 200 km (between 81 and 120 mi). Below the clouds was a region of constantly high temperature and pressure and almost no wind. The Pioneer Venuscraft found the clouds ar...

• New Mexico - geography.

  New Mexico’s major river is the Río Grande, originating in southern Colorado, and flowing southward for 760 km (470 mi) through the state. Between the San LuisValley and Española Valley the river flows in a deep canyon known as the Río Grande Gorge; then, below White Rock Canyon, it flows through several valleys containingagricultural land. Most of the water of the Río Grande is used to irrigate these valleys. The Río Grande’s waterflow in New Mexico is extremely low. One of the major tributarie...

• New Mexico - USA History.

  New Mexico’s major river is the Río Grande, originating in southern Colorado, and flowing southward for 760 km (470 mi) through the state. Between the San LuisValley and Española Valley the river flows in a deep canyon known as the Río Grande Gorge; then, below White Rock Canyon, it flows through several valleys containingagricultural land. Most of the water of the Río Grande is used to irrigate these valleys. The Río Grande’s waterflow in New Mexico is extremely low. One of the major tributarie...

• Paul Martin.

  VI CONFLICT WITH THE PRIME MINISTER Martin’s success could not have been achieved without the support he received from Jean Chrétien. Yet relations between the two men continued to deteriorate. In partthis was because of their continuing disagreement about how best to deal with the separatist challenge in Québec. In the 1993 election, a majority of Québec seats hadgone to the Bloc Québécois, and in 1994 the provincial separatist party, the Parti Québécois, won election on a platform promising...

• Paul Martin - Canadian History.

  VI CONFLICT WITH THE PRIME MINISTER Martin’s success could not have been achieved without the support he received from Jean Chrétien. Yet relations between the two men continued to deteriorate. In partthis was because of their continuing disagreement about how best to deal with the separatist challenge in Québec. In the 1993 election, a majority of Québec seats hadgone to the Bloc Québécois, and in 1994 the provincial separatist party, the Parti Québécois, won election on a platform promising...

• Bicycle.

  narrow as possible to minimize weight and interference with pedaling. F Specialty Bicycles Many other types of bicycles are designed for special purposes. Although not as common as standard single-rider racing, touring, mountain, or recreational bicycles,they nonetheless have significant niches. Recumbent bicycles are bicycles on which the rider sits upright as if in a chair, with legs and feet stretched out in front. Because they support the rider’s lower back,recumbents allow the rider far mo...

• Telescope - astronomy.

  Observatory). In some telescopes designed in the 1990s, the mirror’s weight has been dramatically reduced by sandwiching a honeycomb pattern of glass ribs between a thin, butrigid, concave mirror and a flat back plate. Engineers have even developed meniscus mirrors—mirrors that are too thin to support their own weight. An adjustableframework supports the meniscus mirror, and servomechanical actuators, controlled by computer, continually adjust the shape of the mirror as it tracks celestial tar...

• Richard Wagner.

  which took place in August 1876. Wagner completed his final opera, Parsifal (which he called a 'festival drama of dedication' for the Festspielhaus), in 1882, and it premiered that July. In September Wagner moved to Venice, where in February 1883, after a heated argument with Cosima, he suffered a fatal heart attack. He was buried in Bayreuth. III MUSIC AND THOUGHT In the early 19th century, an opera was structured as a succession of conventional self-contained forms such as aria (a vocal so...

• Optics I INTRODUCTION Mirage Mirages appear because differences in air temperature cause light rays from an object to take different paths to a viewer's eye.

  Refraction of Light by DiamondsThe brilliance of diamonds is due to their high refractive index, a measure of how strongly a transparent material bendslight rays. The skill of the gem-cutter lies in angling the facets of the stone so that each light ray entering it is reflectedmany times before it emerges again.Spencer Grant/Photo Researchers, Inc. The amount of light reflected depends on the ratio of the refractive indexes for the two media. The plane of incidence contains the incident ray and...

• International Law.

  merchants), modernized the rights of neutrals during maritime war, and required blockades to be effective. The Declaration of Paris also initiated the practice of allowingnations other than the original signatories to accede (become a party to) to an agreement. In 1864 a conference convened in Geneva, Switzerland, at the invitation of the Swiss government. The conference approved a convention for the proper treatment ofwounded soldiers on the battlefield and the protection of medical personnel;...

• Hardware (computer).

  Magnetic tape drives use magnetic tape similar to the tape used in VCR cassettes. Tape drives have a very slow read/write time, but have a very high capacity; in fact,their capacity is second only to hard disk drives. Tape drives are mainly used to back up data. Compact disc drives store information on pits burned into the surface of a disc of reflective material ( see CD-ROM). CD-ROMs can store up to 737 megabytes (MB) of data. A Compact Disc-Recordable (CD-R) or Compact Disc-ReWritable (CD-RW)...

• New York (city) - geography.

  The Bronx is the fourth largest and the northernmost of the five boroughs, and the only one on the American mainland. Even so, it is surrounded by water on threesides: Long Island Sound on the east, the Harlem and East rivers on the south, and Hudson River on the west. Encompassing 109 sq km (42 sq mi), it had 1,332,650inhabitants in 2000. Largely residential, the Bronx includes dozens of vibrant neighborhoods. Fieldston is particularly elegant, with great stone houses set among spacious lawns a...

• Belgium - country.

  European Union (EU) directives aimed at improving Belgium’s environmental conditions concern water treatment and water quality, both significant issues in such anindustrial center. Before these directives were issued, the Meuse River, a major source of drinking water, had become polluted from steel production wastes. Otherrivers were polluted with animal wastes and fertilizers. However, Belgium failed to meet EU targets set for the early 2000s for protecting its rivers from farm pollutionand for...

• Belarus - country.

  In the last complete census conducted in the Soviet Union in 1989, the population of Belarus was 10,151,806; a 2008 estimate was 9,685,768, giving the country apopulation density of 47 persons per sq km (121 per sq mi). The most notable demographic trend since the 1950s has been the steady migration of the population fromthe villages to urban centers, and the correspondent aging of the population remaining in the rural areas. In 1959 urban residents accounted for 31 percent of thepopulation; in...

• American Westward Movement - U.

  British expansion. However, Native Americans of the Great Lakes and Ohio Valley lashed out against the English in an attempt to preserve their independence, theirland, and their way of life. With the Ottawa chief Pontiac as their most visible leader, the tribes waged a bloody and costly war. As a result, the British governmentdecided to keep the white settlers apart from the Native Americans. It issued the Royal Proclamation of 1763, banning all white settlement beyond the Appalachians andstatin...

• Cuba - country.

  Only two land mammals, the hutia, or cane rat, and the solenodon, a rare insectivore that resembles a rat, are known to be indigenous. The island has numerous batsand nearly 300 kinds of birds, including vultures, wild turkeys, quail, finches, gulls, macaws, parakeets, and hummingbirds. The bee hummingbird of Cuba is thesmallest bird in the world. Among the few reptiles are tortoises, caimans, the Cuban crocodile, and a species of boa that can attain a length of 3.7 m (12 ft). More than700 speci...

• Solar System - astronomy.

  dwarf planets according to the IAU because they have rounded shapes from their own gravity but have not cleared their neighborhoods in space of other objects—bothorbit through the Kuiper Belt, a region beyond Neptune containing thousands of small icy bodies. Pluto and Eris are composed of layers of ice around a rocky core.Ceres qualifies as a dwarf planet because it is spherical but is found in the asteroid belt, a zone between the orbits of Mars and Jupiter that contains thousands of smallrocky...

• Mesoamerica.

  for cooking. In other regions, the earliest ceramics are more sophisticated technically and aesthetically. At around 1800 BC in the Pacific coastal region of Soconusco (in what is now southeastern Chiapas State, Mexico), the earliest pottery was very complex both in forms and decoration. It seems to have had a social function and beenused primarily for ritual feasting. III MAJOR CIVILIZATIONS Over a period of 3000 years, beginning in about 1500 BC, a number of important cultures emerged in M...

• Star (astronomy) - astronomy.

  absorbing the missing colors of light. For example, the set of dark lines made by hydrogen includes a dark red line, the set of dark lines made by sodium includes a pairof dark yellow lines, and the set of dark lines made by iron includes lines of nearly every color. Each element in the gaseous outer layer of a star produces its ownparticular pattern of dark spectrum lines, depending on the temperature and pressure of the gas. Astronomers have observed spectrum lines, or spectra, for hundredsof...

• United Kingdom - country.

  B Natural Regions and Topography The island of Great Britain can be divided into two major natural regions—the highland zone and the lowland zone. The highland zone is an area of high hills andmountains in the north and west. The lowland zone in the south and east consists mostly of rolling plains. The zones are divided by an imaginary line running throughEngland from the River Exe on the southwest coast to the mouth of the River Tees on the northeast coast. The lowland zone has a milder climat...

• Utah - geography.

  Temperatures decrease from the south to the north in the state. In the mountains the average temperature drops about 0.5°C (about 1°F) for every about 300 m(about 1,000 ft) rise in elevation. Average July temperatures range from less than 16°C (60°F) in the mountains to more than 27°C (80°F) in a few locations insouthern Utah. At Salt Lake City average July temperatures range from a low of 18°C (64°F) to a high of 33°C (92°F). There is a great variation between daytime andnighttime temperatures,...

• Utah - USA History.

  Temperatures decrease from the south to the north in the state. In the mountains the average temperature drops about 0.5°C (about 1°F) for every about 300 m(about 1,000 ft) rise in elevation. Average July temperatures range from less than 16°C (60°F) in the mountains to more than 27°C (80°F) in a few locations insouthern Utah. At Salt Lake City average July temperatures range from a low of 18°C (64°F) to a high of 33°C (92°F). There is a great variation between daytime andnighttime temperatures,...

• Wilfrid Laurier.

  The Manitoba schools were the main issue in the 1896 election. Although the Catholic clergy campaigned against him, Laurier argued in Québec that he would obtainbetter terms for the Catholics by negotiating directly with the provincial government of Manitoba. “Hands off Manitoba” was an effective slogan in the other provinces aswell. A second issue was corruption in the Conservative Party, as a series of scandals had rocked the Bowell administration. Israel Tarte, a former Québec conservativewho...

• Wilfrid Laurier - Canadian History.

  The Manitoba schools were the main issue in the 1896 election. Although the Catholic clergy campaigned against him, Laurier argued in Québec that he would obtainbetter terms for the Catholics by negotiating directly with the provincial government of Manitoba. “Hands off Manitoba” was an effective slogan in the other provinces aswell. A second issue was corruption in the Conservative Party, as a series of scandals had rocked the Bowell administration. Israel Tarte, a former Québec conservativewho...

• Communism.

  In Britain, Robert Owen, a philanthropic Welsh manufacturer, strove against the social problems brought about by the Industrial Revolution and sought to improve thewelfare of workers. As manager of a cotton mill, he enhanced the environment of his workers by improving their housing, modernizing mill equipment for greater safetyand sanitation, and establishing low-priced stores for the workers and schools for their children. Owen believed that workers, rather than governments, should createthe in...

• Communism .

  In Britain, Robert Owen, a philanthropic Welsh manufacturer, strove against the social problems brought about by the Industrial Revolution and sought to improve thewelfare of workers. As manager of a cotton mill, he enhanced the environment of his workers by improving their housing, modernizing mill equipment for greater safetyand sanitation, and establishing low-priced stores for the workers and schools for their children. Owen believed that workers, rather than governments, should createthe in...

• Seattle - geography.

  Mountains. The area includes the suburban cities of Bellevue, Kirkland, Redmond, Renton, and Issaquah. The Eastside has become home to dozens of high-technologyindustries including Microsoft Corporation, ATL Ultrasound, Nintendo of America, divisions of The Boeing Company, and many other firms. In the 1960s commutersheaded to Seattle jobs from homes on the Eastside. Today, the “reverse commute” from Seattle homes to jobs on the Eastside is just as heavy, and both streams oftraffic cross the same...

• Asteroid - astronomy.

  Asteroids of the S type, related to the stony iron meteorites, make up about 15 percent of the total population of asteroids that can be seen from Earth. Much rarer arethe M-type objects, corresponding in composition to the meteorites known as “irons.” These objects are made up of an iron-nickel alloy and may represent the cores ofbodies that were large enough to differentiate into layers and to melt deep inside. Their rocky outer layers may have been removed by impacts with other asteroids . A...

• Human Sexuality.

  About six weeks after conception, if a Y chromosome is present in the embryo's cells (as it is in normal males), a gene on the chromosome directs the undifferentiatedgonads to become testes. If the Y chromosome is not present (as in normal females), the undifferentiated gonads will become ovaries. If the gonads become testes, they begin to produce androgens (male hormones, primarily testosterone) by about eight weeks after conception. These androgens stimulate development of the one set of the...

• Wars of Yugoslav Succession.

  of Yugoslav succession was over. In January 1992 members of the European Community (EC; after 1993 the European Union, EU) recognized Slovenia’s independencealong with that of Croatia. The United States and other countries did so shortly thereafter. IV THE WAR IN CROATIA As the Yugoslav army withdrew from Slovenia in July 1991, a second and far more serious conflict erupted in Croatia. But the road to war in Croatia began more than ayear earlier. In April and May 1990 the Croatian Democratic U...

• Wars of Yugoslav Succession .

  of Yugoslav succession was over. In January 1992 members of the European Community (EC; after 1993 the European Union, EU) recognized Slovenia’s independencealong with that of Croatia. The United States and other countries did so shortly thereafter. IV THE WAR IN CROATIA As the Yugoslav army withdrew from Slovenia in July 1991, a second and far more serious conflict erupted in Croatia. But the road to war in Croatia began more than ayear earlier. In April and May 1990 the Croatian Democratic U...

• Statistics I INTRODUCTION Statistics, branch of mathematics that deals with the collection, organization, and analysis of numerical data and with such problems as experiment design and decision making.

  Professional pollsters typically conduct their surveys among sample populations of 1,000 people. Statistical measurementsshow that reductions in the margin of error flatten out considerably after the sample size reaches 1,000.© Microsoft Corporation. All Rights Reserved. The raw materials of statistics are sets of numbers obtained from enumerations or measurements. In collecting statistical data, adequate precautions must be taken tosecure complete and accurate information. The first problem of...

• Woodrow Wilson.

  daughters. In 1885 Wilson also accepted a position with the newly opened Bryn Mawr College, a school for women near Philadelphia. Wilson was not particularly patient with womenas intellectual associates and did not enjoy his teaching duties. He was, however, able to pursue his writing. A University Professor In 1888 Wilson left Bryn Mawr for a professorship in history and political economy at Wesleyan University in Connecticut. There, in 1889, he published The State, a lengthy textbook analyz...

• Woodrow Wilson

  daughters. In 1885 Wilson also accepted a position with the newly opened Bryn Mawr College, a school for women near Philadelphia. Wilson was not particularly patient with womenas intellectual associates and did not enjoy his teaching duties. He was, however, able to pursue his writing. A University Professor In 1888 Wilson left Bryn Mawr for a professorship in history and political economy at Wesleyan University in Connecticut. There, in 1889, he published The State, a lengthy textbook analyz...

• James Buchanan.

  John Slidell. Slidell was instructed to insist that Mexico recognize the annexation of its former province, Texas, and that it pay certain long-standing claims of UnitedStates citizens. As payment for the claims, Slidell was told to press for the Mexican territory lying between Texas and the Pacific Ocean. The American demands werenot met, and soon afterward the Mexican War broke out in 1846. D3 Cuba While secretary of state, Buchanan also tried to further one of his favorite projects, the purc...

• James Buchanan

  John Slidell. Slidell was instructed to insist that Mexico recognize the annexation of its former province, Texas, and that it pay certain long-standing claims of UnitedStates citizens. As payment for the claims, Slidell was told to press for the Mexican territory lying between Texas and the Pacific Ocean. The American demands werenot met, and soon afterward the Mexican War broke out in 1846. D3 Cuba While secretary of state, Buchanan also tried to further one of his favorite projects, the purc...

• Slavery in the United States - U.

  tripled, from about 1.2 million to almost 4 million in 1860. The natural growth of the slave population meant that slavery could survive without new slave imports. Natural population growth also hastened the transition from an African to an African American slave population. By the 1770s, only about 20 percent of slaves in thecolonies were African-born, although the concentration of Africans remained higher in South Carolina and Georgia. After 1808 the proportion of African-born slavesbecame tin...

• Immigration.

  1655, only to lose all of their North American colonies to the British in 1664. These early colonies were often quite cosmopolitan, drawing settlers from many nations.When the English seized New Amsterdam, the city was home to perhaps 1500 residents, including Walloons, Huguenots, Swedes, Dutchmen, and African Americans. C The French and Spanish The French and Spanish also established colonies in North America. The Spanish established the oldest permanent European settlement in Saint Augustine,...

• Immigration - U.

  1655, only to lose all of their North American colonies to the British in 1664. These early colonies were often quite cosmopolitan, drawing settlers from many nations.When the English seized New Amsterdam, the city was home to perhaps 1500 residents, including Walloons, Huguenots, Swedes, Dutchmen, and African Americans. C The French and Spanish The French and Spanish also established colonies in North America. The Spanish established the oldest permanent European settlement in Saint Augustine,...

• Ottoman Empire - history.

  Süleyman ISüleyman I, the sultan of the Ottoman Empire during its zenith, became known in the western world as Süleyman the Magnificent. Hewas known among his own people as the Lawgiver because he revised the legal system of the empire. Süleyman had several sons,two of whom he executed after quarreling with them.Culver Pictures Bayazid died in captivity, a suicide according to some accounts, and a struggle for succession to the sultanate broke out among his sons. Muhammad I (reigned 1413-1421)ev...

• New York (city) - geography.

  Concourse are particularly prized, because the apartment buildings are well kept and the public parks are easily accessible. City Island retains the charm of a small fishingvillage. Parts of the Bronx, however, fell victim to decay and abandonment, especially between 1970 and 1980, when the population of the borough fell by 20 percent. The low pointoccurred in 1976, when future U.S. president Jimmy Carter compared the South Bronx to the bombed-out German city of Dresden after World War II (1939-...

• Richard Wagner I INTRODUCTION Richard Wagner (1813-1883), German composer, conductor, and essayist, one of the most influential cultural figures of the 19th century.

  May 1864 he was summoned to Munich by the 18-year-old King Ludwig II of Bavaria, who settled Wagner's debts, paid him a generous allowance, and provided himwith housing. Wagner was soon joined in his new home by Cosima von Bülow, Liszt’s daughter and the wife of German conductor and pianist Hans von Bülow. Wagnerand Cosima began a relationship that produced three children before the dissolution of the Bülows' marriage in 1870. Mounting hostility toward Wagner by members ofLudwig’s court resulted...

• Jimmy Carter.

  B Election of 1976 Carter apparently decided as early as 1972, halfway through his four-year term as governor, that he would seek the presidency of the United States. Soon after the1972 election, his campaign manager drew up a detailed campaign strategy. Carter followed the plan closely, beginning an exhausting schedule of campaigning as soonas his gubernatorial term ended. When Carter formally announced in January 1975 that he was a candidate for president, he had almost no national reputation...

• Jimmy Carter

  B Election of 1976 Carter apparently decided as early as 1972, halfway through his four-year term as governor, that he would seek the presidency of the United States. Soon after the1972 election, his campaign manager drew up a detailed campaign strategy. Carter followed the plan closely, beginning an exhausting schedule of campaigning as soonas his gubernatorial term ended. When Carter formally announced in January 1975 that he was a candidate for president, he had almost no national reputation...