13 résultats pour "submarine"
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Submarine.
B Propulsion Modern submarines use either diesel-electric or nuclear power to drive the sub's propeller and to provide internal electric power. Diesel-electric power emerged as themost efficient propulsion system for submarines in the early 20th century, following unsuccessful attempts to use steam or gasoline power. While on the surface, thesubmarine uses a diesel engine to drive the propeller and generate electricity. When submerged, a battery-driven electrical motor takes over for propulsion...
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World War I .
and troops to Europe from the United States and other overseas sources. In 1914 Britain implemented a sea blockade of Germany to prevent the delivery of importssuch as food and war materials. The same year, Germany began using submarines to disrupt Allied seaborne traffic and prevent supplies from reaching Britain. In 1915Germany instituted a submarine blockade around Britain. From February 1915 to September 1915 and again in 1917, Germany used unrestricted submarine warfare,sinking ships withou...
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Valley.
Except in mountainous terrain, rivers are almost always flanked by floodplains. Floodplains are flat wide deposits of alluvium, river-deposited sediment, on either side of the river channel. During floods, a river overflows its banks and spreads out the sediment near the river to form a floodplain. Floodplains of large rivers, such as thoseof the Mississippi River, can be flat areas tens of kilometers across. River channels migrate back and forth across their floodplains as alluvium is repeate...
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Valley - Geography.
Except in mountainous terrain, rivers are almost always flanked by floodplains. Floodplains are flat wide deposits of alluvium, river-deposited sediment, on either side of the river channel. During floods, a river overflows its banks and spreads out the sediment near the river to form a floodplain. Floodplains of large rivers, such as thoseof the Mississippi River, can be flat areas tens of kilometers across. River channels migrate back and forth across their floodplains as alluvium is repeate...
- SLBM (Submarine Launched Ballistic Missile) , missile stratégique tiré d'un sous-marin.
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Canadian Forces.
As the Land Force Command component of the CF, the Canadian army is responsible for land combat and for physically protecting people and land-based resources. Itis the component of the CF most often called on to support international military operations and peacekeeping missions and to maintain order in times of civil unrest. A Organization The 20,900 personnel who comprise the army’s regular force are organized into four geographically based areas. Land Force Atlantic includes the provinces of...
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World War II .
the Nazi-Soviet Pact was signed. In the part published the next day, Germany and the Soviet Union agreed not to go to war against each other. A secret protocol gaveStalin a free hand in Finland, Estonia, Latvia, eastern Poland, and eastern Romania. See also German-Soviet Nonaggression Pact. III MILITARY OPERATIONS In the early morning hours of September 1, 1939, the German armies marched into Poland. On September 3 the British and French surprised Hitler by declaring war onGermany, but they...
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The Beatles - Musik.
1963 Please, Please Me Please, Please MeLove Me DoI Saw Her Standing ThereTwist and Shout 1963 With The Beatles It Won't Be LongAll My LovingPlease Mister PostmanRoll Over BeethovenI Wanna Be Your Man 1964 Meet The Beatles I Want To Hold Your HandThis Boy 1964 Something New Things We Said TodayAnd I Love Her 1964 A Hard Day's Night A Hard Day's NightCan't Buy Me LoveI Should Have Known Better 1964 Beatles for Sale I'm A LoserEight Days A WeekEverybody's Trying To Be MyBaby 1965 Help! Help!Youre...
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Tectónica de placas - ciencias de la naturaleza.
continentales señalada por el famoso geólogo vienés Eduard Suess, hacia 1880. Reconoció un ‘tipo atlántico’ de margen, identificado por el truncado abrupto de antiguascadenas montañosas y por estructuras hendidas, y un ‘tipo pacífico’, marcado por montañas dispuestas en cordilleras paralelas, por líneas de volcanes y por terremotosfrecuentes. Para muchos geólogos, las costas de tipo pacífico parecen estar localizadas donde los geosinclinales se deforman y se elevan para formar montañas. 3 EXPANS...
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Manhattan Project - U.
other possible uses of nuclear energy, such as using uranium to operate large power plants or, perhaps, as power sources for ships or submarines. Then Nazi Germanyinvaded Poland on September 1, 1939, and Europe plunged into war. The scientists realized that any plans to build large-scale nuclear power plants would have to waituntil the war was over. Two weeks after the invasion of Poland, Hitler made a radio speech in which he threatened Britain with “a weapon against which there is no defense.”...
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Halifax (Nova Scotia) - Geography.
During World War I (1914-1918) Halifax again became a military bastion. Huge convoys of ships assembled at the inner harbor (Bedford Basin) to prepare for sailingthrough the submarine-infested North Atlantic. On December 6, 1917, a munitions ship arriving to join a convoy collided with another vessel at the Narrows leading intothe Basin. A massive explosion resulted, killing nearly 2000 people and devastating the whole north end of the city. In World War II Halifax played a vital role in the All...
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Vulkanismus - geographie.
6 OBERFLÄCHENVULKANISMUS Kontinentaler Vulkanismus hat zwar einen wesentlich geringeren Umfang als submariner Vulkanismus, was das Volumen des Magmas betrifft, aber er ist aufgrund derleichteren Zugänglichkeit sehr viel besser erforscht. Es ist seit historischen Zeiten bekannt, dass Vulkanausbrüche sowohl durch gewaltige Ascheexplosionen als auch durchruhig fließende Lavaströme gekennzeichnet sein können. 6.1 Spalteneruptionen Spalteneruptionen gibt es nicht nur entlang der Mittelozeanischen R...
- Baltic Sea, action on the