326 résultats pour "size"

• From Bulfinch's Mythology: Druids - anthology.

  Besides these two great annual festivals, the Druids were in the habit of observing the full moon, and especially the sixth day of the moon. On the latter they soughtthe Mistletoe, which grew on their favourite oaks, and to which, as well as to the oak itself, they ascribed a peculiar virtue and sacredness. The discovery of it was anoccasion of rejoicing and solemn worship. 'They call it,' says [1st-century Roman encyclopedist] Pliny [the Elder], 'by a word in their language, which means 'heal-a...

• Internal-Combustion Engine.

  any Otto-cycle engine and in actual engines today is slightly more than 40 percent. Diesels are, in general, slow-speed engines with crankshaft speeds of 100 to 750revolutions per minute (rpm) as compared to 2500 to 5000 rpm for typical Otto-cycle engines. Some types of diesel, however, have speeds up to 2000 rpm. Becausediesels use compression ratios of 14 or more to 1, they are generally more heavily built than Otto-cycle engines, but this disadvantage is counterbalanced by theirgreater effici...

• Antarctica - geography.

  The geographic South Pole lies near the center of the continent in East Antarctica. This point is where all map lines of longitude converge at the southern end ofEarth’s axis of rotation. Distinct from the geographic south pole is the south magnetic pole, where the lines of force of Earth’s magnetic field emerge vertically,arching upward over the planet to enter Earth again at the north magnetic pole. The south-seeking end of a compass needle points to the south magnetic pole. Thesouth magnetic...

• Laser.

  their atoms into laser light. Consequently, they are the most powerful continuous wave (CW) lasers—that is, lasers that emit light continuously rather than in pulses. C Liquid Lasers The most common liquid laser media are inorganic dyes contained in glass vessels. They are pumped by intense flash lamps in a pulse mode or by a separate gas laserin the continuous wave mode. Some dye lasers are tunable, meaning that the color of the laser light they emit can be adjusted with the help of a prism lo...

• Eagle - biology.

  States, is a member of this group found only in North America. It is named for its snow-white head. However, the name bald does not refer to a lack of feathers but comes instead from an outdated word meaning marked with white, as in piebald. The adult bald eagle is blackish brown, with a white head and tail. Its bill, legs, and feet are bright yellow. The bill, which is longer and heavier than the gray bill of golden eagles, is useful for piercing the skin of fish. Bald eagles vary in size....

• Physical Chemistry - chemistry.

  by the system in the form of the flow of electrical currents, formation of surfaces and changes in surface tension, changes in volume or pressure, and formation ordisappearance of chemical species. B Chemical Kinetics This field studies the rates of chemical processes as a function of the concentration of the reacting species, of the products of the reaction, of catalysts and inhibitors, ofvarious solvent media, of temperature, and of all other variables that can affect the reaction rate. It is...

• Turbine.

  steam turbine has supplanted the reciprocating engine as a prime mover in large electricity-generating plants and is also used as a means of jet propulsion. Steam turbines are used in the generation of nuclear power and in nuclear ship propulsion. They operate with fuel-fired boilers for power generation. In cogenerationapplications requiring both process heat (heat used in an industrial process) and electricity, steam is raised at high pressure in the boiler and extracted from the turbineat th...

• Wireless Communications.

  were large, heavy units. After the invention of the transistor in 1948, radios shrank in size to small handheld radio transceivers. Public two-way radios with severalfrequency options are widely available as well. Usually limited in range to a few miles, these units are great aids for such mobile professionals as construction workers,film crews, event planners, and security personnel. Simpler two-way radios, called walkie-talkies, have been popular children’s toys for years. Most walkie-talkiesb...

• Neandertals.

  Neandertals made stone tools by striking flakes from rock “cores.” The cores were carefully selected and prepared so that only a single blow was normally required todetach a flake. A number of relatively standardized flakes were sometimes produced from a single core. These sharp flakes served as “blanks” that were further workedand shaped into the desired tools. Suitable stone was sometimes rare, and often tools were sharpened and resharpened to make new tools, yielding a whole variety ofshapes...

• Conservation.

  cancers, Hodgkin’s disease and leukemia. Unfortunately, human activities have greatly reduced biodiversity around the world. The 20th century encompasses one of the greatest waves of extinction, orelimination of species, to occur on the planet. The greatest threat to biodiversity is loss of habitat as humans develop land for agriculture, grazing livestock, industry,and habitation. The most drastic damage has occurred in the tropical rain forests, which cover less than seven percent of the Earth’...

• Public Education in the United States.

  opportunities for them to break out from whatever social or economic circumstances constrained their development. IV HIGHER EDUCATION During the 20th century participation in higher or postsecondary education in the United States increased as dramatically as it did in American high schools. At thebeginning of the century about 2 percent of Americans from the ages of 18 to 24 were enrolled in a college. There were fewer than 1,000 colleges then, with enrollmenttotaling about 157,000 students. N...

• Han Dynasty - History.

  However, these reforms faced serious opposition. The feudal barons formed an alliance and rebelled against Wang Mang. They were joined by members of the Liufamily, who were descended from Jingdi (Ching-ti), a former Han emperor, and a civil war followed. As the empire fell into disorder, militant secret societies formedarmed bands and attacked villages and towns. Wang Mang had believed that proper institutions would eventually bring peace to China, but in AD 23, an army led by the Liu clan brea...

• Heredity - biology.

  allele from the mother and a mutated allele from the father. In both of these cases, the child will be a carrier. The child develops the disease only if he or she receives amutated allele from each parent. When both parents are carriers, there is a 25 percent chance that a child will be disease-free, a 25 percent chance that it will have thedisease, and a 50 percent chance that it will be a carrier. Examples of genetic diseases that follow the dominant-recessive pattern include sickle-cell anemi...

• Electoral College.

  III HISTORY OF THE ELECTORAL COLLEGE A Origins One thing is clear about the political theory underpinning the electoral college: The framers of the Constitution could not agree on one. From the outset, the framerswere uncertain about how the president should be chosen. Meeting in the Constitutional Convention in Philadelphia, Pennsylvania, in 1787, the framers originally decidedto have Congress choose the president, and that there should be no popular vote to elect the president. Then the Con...

• Inca Empire.

  The Incas’ public works were built through a labor tax known as mit’a. This tax required most people incorporated into the Inca Empire to provide labor for public worksduring certain portions of each year. This labor tax supported large-scale public works that required the marshalling of large labor forces, such as for the building offorts, roads, and bridges, or the mining of metals and gems. It also allowed the emperor to raise large armies to undertake wars of conquest. Road building was impo...

• Inca Empire - History.

  The Incas’ public works were built through a labor tax known as mit’a. This tax required most people incorporated into the Inca Empire to provide labor for public worksduring certain portions of each year. This labor tax supported large-scale public works that required the marshalling of large labor forces, such as for the building offorts, roads, and bridges, or the mining of metals and gems. It also allowed the emperor to raise large armies to undertake wars of conquest. Road building was impo...

• Dolphin (aquatic mammal) - biology.

  Scientists have observed dolphins displaying three types of caregiving behaviors: standing by, excitement, and supporting. In standing-by behavior, dolphins remain inthe vicinity of an injured or ill companion without offering aid. In excitement behavior, dolphins swim swiftly in circles around an injured dolphin, responding aggressivelytoward threats to the injured animal. For instance, they may bite harpoon lines or charge boats that come too close to the animal. In supporting behavior, one or...

• Turtle.

  Turtles use their jaws to cut and handle food. Instead of teeth, a turtle’s upper and lower jaws are covered by horny ridges, similar to a bird’s beak. Meat-eating turtlescommonly have knife-sharp ridges for slicing through their prey. Plant-eating turtles often have ridges with serrated edges that help them cut through tough plants.Turtles use their tongues in swallowing food, but unlike many other reptiles, such as chameleons, they cannot stick out their tongues to capture food. C Limb Structu...

• Turtle - biology.

  Turtles use their jaws to cut and handle food. Instead of teeth, a turtle’s upper and lower jaws are covered by horny ridges, similar to a bird’s beak. Meat-eating turtlescommonly have knife-sharp ridges for slicing through their prey. Plant-eating turtles often have ridges with serrated edges that help them cut through tough plants.Turtles use their tongues in swallowing food, but unlike many other reptiles, such as chameleons, they cannot stick out their tongues to capture food. C Limb Structu...

• Shark - biology.

  Sharks have two-chambered hearts that are relatively small compared to the rest of their bodies. Blood flows from the heart to the gills, where it collects oxygen fromwater and then distributes it to the other organs and tissues. The small heart produces weak blood pressure, and many sharks must swim continuously to create themuscular contractions needed to circulate blood throughout their bodies. Most sharks are cold-blooded—that is, they do not generate heat by digesting food. Instead, the bod...

• United States House of Representatives.

  Because of the high cost of elections and the short two-year term of office, members of the House campaign almost constantly. They spend much of their time raisingcampaign funds, and they frequently return to their districts to keep in touch with voters. Because the elections are so frequent, House members tend to pay closeattention to how their votes in Congress will be seen in the short term. House members tend to come from wealthier family backgrounds than average Americans. Few working class...

• Census.

  Prior to any census, a census agency must develop an accurate list of addresses and maps to ensure that everyone is counted. The U.S. Census Bureau obtainsaddresses primarily from the United States Postal Service and from previous census address lists. It also works closely with state, local, and tribal governments tocompile accurate lists. Finally, census agencies often conduct an extensive marketing campaign before Census Day to remind the general population about theimportance of responding t...

• Planetary Science - astronomy.

  III ORIGINS AND COMPOSITIONS OF PLANETS Astronomers believe that planetary systems are formed of elemental materials that were created in the interiors of giant stars. Some of this material comes from giantstars that shed material into space as they age. Most of the matter to form planets, however, comes from stars that explode as supernovas and spread debris enrichedwith the heavier chemical elements into space. According to the currently accepted views, the most likely first stage in the evo...

• Colleges and Universities.

  and (3) large universities that include undergraduate programs in addition to graduate and professional schools. D Graduate and Professional Schools Professional schools are typically divisions of large universities. They offer specialized education in a variety of professional fields, such as education, business, medicine,law, social work, agriculture, journalism, architecture, fine arts, nursing, engineering, and music. Some professional schools offer four- or five-year programs leading toa b...

• Aboriginal Australians - History.

  Until Europeans began to settle in Australia in 1788, the Aboriginal way of life was supported by hunting, gathering, and fishing. Like other hunting and gatheringpeoples, Aboriginal people had an extremely detailed knowledge of their environment, especially plant ecology and animal behavior. The deep connection betweenAboriginal people and the natural world influenced every part of their culture, including their food gathering, tools, trade, religion, art, music, language, and socialorganizatio...

• Africa.

  The highest elevations in Africa are found in the various ranges of East Africa. After Kilimanjaro, the next highest peaks are Mount Kenya (5,199 m/17,057 ft), north ofKilimanjaro in central Kenya; Margherita Peak (5,109 m/ 16,762 ft) in the Ruwenzori Range on the border between Uganda and the Democratic Republic of the Congo(DRC); Ras Dashen (4,620 m/ 15,157 ft) in the Ethiopian Highlands of northern Ethiopia; Mount Meru (4,565 m/ 14,977 ft), close to Kilimanjaro in Tanzania; and MountElgon (4,...

• 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...

• Thailand - country.

  E Natural Resources Thailand possesses a range of mineral resources. Tin is mined in the peninsula. Important gemstones, such as sapphires, are found in the southeast, and coal reserves,particularly lignite, are in the north. Fish are abundant in rivers and coastal waters. In addition to being consumed domestically, fish are also exported. F Climate Thailand experiences a typical monsoon climate. Winds blow from the northeast during the winter months of October to March or April (known as the...

• North Carolina - geography.

  The drainage divide in North Carolina follows the Blue Ridge range on the eastern margin of the mountain region. This is called the “Eastern Continental Divide.” West ofthis divide, rivers drain into the Mississippi River through the Tennessee River and other tributaries of the Ohio River. The French Broad, the largest, and the LittleTennessee flow into the Tennessee River. The New River flows into the Kanawha River of West Virginia which in turn flows into the Ohio River. Most of the state’s ri...

• North Carolina - USA History.

  The drainage divide in North Carolina follows the Blue Ridge range on the eastern margin of the mountain region. This is called the “Eastern Continental Divide.” West ofthis divide, rivers drain into the Mississippi River through the Tennessee River and other tributaries of the Ohio River. The French Broad, the largest, and the LittleTennessee flow into the Tennessee River. The New River flows into the Kanawha River of West Virginia which in turn flows into the Ohio River. Most of the state’s ri...

• Ontario - Geography.

  governed Ontario’s initial settlement and development. The province’s most important river is the St. Lawrence. Its route was much improved and enlarged by dredgingand canal building in the mid-20th century. This enabled large ocean-going vessels to reach Great Lake ports ( see St. Lawrence Seaway). The Ottawa River was an important early route to the interior for fur traders and timber merchants. The Niagara River, because of its falls, is a great center of hydroelectric power as well as aninte...

• Ontario - Canadian History.

  governed Ontario’s initial settlement and development. The province’s most important river is the St. Lawrence. Its route was much improved and enlarged by dredgingand canal building in the mid-20th century. This enabled large ocean-going vessels to reach Great Lake ports ( see St. Lawrence Seaway). The Ottawa River was an important early route to the interior for fur traders and timber merchants. The Niagara River, because of its falls, is a great center of hydroelectric power as well as aninte...

• Florida - USA History.

  accidentally introduced into the region in the 1880s, and it spread with alarming rapidity throughout the upper reaches of the river. The plant is very difficult toeradicate, and it has also clogged the channels of other Florida rivers. To increase drainage of the Everglades, which drain naturally to Florida Bay and the Gulf ofMexico, a number of drainage channels and canals have been built across southern Florida. Among the rivers flowing from the peninsula to the Gulf of Mexico are the Suwanne...

• Republic of Indonesia - country.

  Mahakam in East Kalimantan and the Martapura and Barito in South Kalimantan. Most of these rivers originate in the island’s central massif (mountain mass) and meander through extensive swamps as they approach the coast. Settlements such as Samarinda and Banjarmasin cluster along the rivers, which serve ascommunication routes into the interior. The largest rivers on Sumatra drain from west to east into the Strait of Malacca. In the north, the Asahan River once linked trade between the Batak peo...

• Middle Ages .

  Saints were very important in Late Antiquity. They were considered both models of virtue and powerful miracle workers. One of the most well-known saints of the periodwas Saint Anthony. Anthony gave away all his possessions and left his hometown in Egypt to live alone in the desert and pray. Anthony was one of the first Christianmonks. The word monk comes from a term meaning 'alone.' Gradually Anthony attracted followers, and he eventually became the center of a whole community of monks who wis...

• DM – LA PHOTOSYNTHESE

  TA STAV BIOLOGIE M7-2 échanges gazeux de la photosynthèse , nommez , situez et présentez les mécanismes principaux des 2 phases photosynthétiques au niveau du chloroplaste et concluez en montrant les liens entre photosynthèse et transport des nutriments chez la plante . ( question de synthèse type E7 BAC !!) (10 pts) TSVP … (question 2.1.) : Notez ci-dessous les 6 légendes manquantes (pointillés) sur le schéma ci-d...

• Rousseau et le désir - La Nouvelle Héloïse

  Explication du texte de Rousseau La nouvelle Héloïse A travers cet extrait, Rousseau aborde le rapport entre le désir et le bonheur. On croit communément qu’il est nécessaire de satisfaire ses désirs pour être heureux. Cependant, dans ce texte, le philosophe genevois affirme paradoxalement que le bonheur réside dans le fait de désirer et non dans l’assouvissement des désirs. Il souligne l’importance de l’imagination d...

• ROMAN DE SAINT JEAN-BAPTISTE

  Diurrs ipi>odfs du Roman de Renart. D'un rhapileau dt la calhtdralt de Strasbourq d'aflrts la gravure dt Fischart. Renttrt l'accueille avec une rondeur, une bonbo .. mie charn�anteo. A plus tard les aff aire s sérieuaea! Parl on s chasse. Parlons rloallles. Tibert. se tirera avec oetne de l'a.,·enture oû il est entrafné dana la. ma.IRon d'u n prêtre des en virons. Quand il rend compte il la cour de son éebec. le ressen timen t du roi se tourn e sur...

• Le carnaval de rio de janeiro

  HDA Brésil - 80 rues interdites à la circulation environ - Entre 95% et 98% des hôtels occupés - 69 millions de préservatifs distribués par le ministère de la santé - 170 tonnes d’ordures ramassées Histoire Le carnaval de Rio trouve ses origines dans l’ « entrudo » qui était une journée de liberté accordée aux esclaves lors du solstice d’été. Ils passaient la journée à parcourir les rues en s’arrosant d’eau, de boue, de farine. Au XIX la...

• Le bonheur est-il le bien suprême ?

  personne souhaitant y gouter. En effet, Si tous les hommes désirent le bonheur, il est difficile de déterminer avec une certitude complète ce qui pourrait les rendre heureux. Le plus souvent, on entend par le bonheur la satisfaction absolue et que seule la possession de ce qui manque pourrait les combler. Si le bonheur était un bien, il serait le plus difficile à acquérir. Pour chacun la notion de bonheur est différente. C. Le bonheur est -il le bien suprême ? Le suprême serait...

• REALISER UNE FICHE DE SYNTHESE SUR LES LUMIERES

   Citez les grands auteurs européens du XVIIIème siècle ? Texte support : Les Lumières, c'est pour l’homme sortir d'une minorité qui n'est imputable qu'à lui. La minorité, c'est l'incapacité de se servir de son entendement sans la tutelle d'un autre. C'est à lui seul qu'est imputable cette minorité, dès lors qu'elle ne procède pas du manque d'entendement, mais du manque de résolution et de courage nécessaires pour se servir d...

• Qu'est ce qui peut faire échouer le dialogue ?

  (I- Echec volontaire ) Lorsqu'une ou plusieurs personnes dialoguent un échange a lieu: mais si une des personnes refusait de parler ? Effectivement , si les participants refusent volontairement d'échanger il ne peut y avoir de di scussion . Prenons l'exemple du mutisme d'un accusé lors d'un procès: si lorsque l'avocat lui pose un certains nombre de question celui -ci n'y répond pas , il met fin au dialogue sans même qu'il n'ai réellement commencé. Le destinataire peut alors avo...

• Fiche de lecture cursive « Art » de Yasmina Reza

  Les personnages : Marc, "l'adepte du bon vieux temps" Il est ingénieur dans l'aéronautique. La quarantaine. Il sort avec Paula. Il connaît Serge depuis 15 ans.Serge le présente (lignes 50 à 56): "Mon ami Marc, qui est un garçon intelligent, garçon que j'estime depuis longtemps, belle situation, ingénieur dans l'aéronautique, fait partie de ces intellectuels, nouveaux, qui, non contents d'être ennemis de la modernité en tirent une vanité incompréhensible. Il y a depuis peu, ch...

• Synthèse sur la peine de mort

  contestable : la société se prive d’une vie qui pourrait être reformé et utile. Une longue peine apparait bien plus pénible et dissuasive, la souffrance pouvant amener le repentir et le changement. D’un point de vu politique, il est raisonnable de penser qu’un acte isolé ne puisse pas ébranler la cohésion et la survie d’un groupe. Victor Hugo engagera avec fougue et détermination la réflexion sur la dimension humaine et morale du problème. La pensé libérale anglo-saxonne nourrie de...

• Qu'est-ce qu'un mythe ?

  La philosophie de Platon abonde en mythes, parce que la raison ne saurait tout dire, et que le mythe, au lieu d'abstraire et d'exclure, image et imite l'existence, four­ nissant ains�·une leçon perpétuellement valable. Aristote déclare que le philo­ sophe est naturellement un grand amateur de mythes, car ils recèlent des trésors de merveilles ou d'étonnement. Les Grecs désignaient indifféremment une fable d'Esope par le terme mythos ou par celui de logos (...

• Bougainville Voyage Autour Du Monde

  manifestent le respect de l’altérité : la curiosité éprouvée à l’égard du monde rencontré n’exclut pas d’en apercevoir les différences ; l’incertitude domine le voyageur, au contraire des Parisiens décrits par Montesquieu. La description de ce monde nouveau gagne de fait en authenticité : le lecteur partage la découverte de Bougainville en éprouvant, par la modalisation, ses moments d’incertitude. 3 Un tableau completOn remarquera enfin l’exhaustivité de l’évocation : dans son Voyage a...

• « RÉFLEXIONS SUR LA RÉVOLUTION DE FRANCE » D'EDMUND BURKE

  SUITES DE LA R�VOLUTION à néant toutes ses ambitions, et sauva sans doute la liberté anglaise. De mémorables interventions de Burke (discours sur la taxation des Américains, 1774; discours sur la conciliation avec l'Amérique, 1775), au cours du combat par lui livré pour empêcher la sécession des treize colonies, avait mis le sceau à sa réputation. Réputation d'indomptable libéral, de magnifique, puissant et somptueux orateur politique. Mais ensuite, Burke,...

• Les droits subjectifs et leurs titulaires

  2Prépas HEC « Ce qu’on appelle liberté , dans le langage politique , c’est le droit de faire des lois , c’est-à- dire d’ enchaîner la liberté . » Auguste Vermorel pénale. Dans certains cas toutefois, le secret ne s’applique pas, il en va ainsi de la correspondance des détenus. En France, les écoutes téléphoniques depuis 1991 doivent faire l’objet soit d’une autorisation écrite et motivée du Premier ministre (écoute administrative) soit d’une autoris...

• Philosophie : sommes-nous en démocratie ?

  des trois pouvoirs constituant un Etat. . N ous avons aussi une grande chance de pouvoir effectuer des élections c’est à d ire que nous pouvons choisir un candidat par rapport a ces objectifs et sa vision du pays pour qu’il devienne notre président ainsi grâce à ces élections qui sont bien sur libres et transparentes nous pouvons exprimer nos choix et nos visions à travers ce candidat. Dans d’autres pays, le peuple n’a pas le choix de son dirigeant. Par exemple aux Pays -Bas, d...

• L'« ENQUÊTE SUR LA MONARCHIE » DE CHARLES MAURRAS

  SOCIALISME ET NATIONALISME de l'Ancien Régime, n'était pas une poussière d'individus comme la prétendue société «m oderne ». Elle se composait de «corps » qui depuis la famille jusqu'au métier encadraient l'individu. Dans cette société constituée, tout tendait à faire corps. On y connaissait le nous, non le moi. L'État était une «grande famille ». Le sens profond de la monarchie légitime, c'était la fixation du pouvoir politique dans une famille, soutenue...