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建立人际资源圈Whas_It_Necessary_To_Drop_Tha_A-bomb_
2013-11-13 来源: 类别: 更多范文
Whas It Necessary To Drop Tha A-bomb'
WAS IT NECESSARY'
In 1945, August 6th the worlds first atomic bomb was dropped on the City of Hiroshima in Japan. A U.S. B-29 bomber dropped the bomb that killed nearly 150,000 people; those who had not been killed wish they were dead as they laid in agony from burns. More than 10 sq km/4 sq mi was obliterated into piles of rubble. Was the U.S. justified in using the atomic bomb against Japan'
An a-bomb creates a huge amount of energy. About half of this energy is used to create a blast wave. The release of huge amounts of energy and power that in a fraction of seconds it makes a blast effect that travels at the rate of about 20.1 km per min., thats greater than the speed of sound. (The Atomic Bomb (2001). Geo Cities.)
The hypocenter is the greatest amount of pressure-exerted witch is about 35 tonnes per sq. meter and the max air speed was 440 meters per second. As the blast moves away from the center its intensity decreases. As the blast subsided after blowing from the center, a vacuum of air and pressure generated in the center. The reversed winds begin blowing towards the center from
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