manhattanproject
The Manhattan Project was the code name of the U.S.'s attempt to construct an atomic bomb duringWorld War II. It was named after the Manhattan Engineer District of the U.S. Army Corps of Engineers, because a lot of it's earlier research was done in New York City. An atomic bomb is a weapon that uses the energy from a nuclear reaction called Fission for its destruction. The idea that mass could be changed into energy was predicted by Albert Einstein in the earlier part of the 1900's. John D. Cockcroft and Ernest Walton confirmed this by experiments in 1932. Then in 1938, nuclear fission was discovered by German scientists, and it was feared by many of the U.S. scientists, that Hitler would try to build a fission bomb. Three Hungarian-born physicists, Leo Szilard, Eugene Wigner, and Edward Teller asked Albert Einstein to send a letter to Franklin Roosevelt. Compelled by the letter in late 1939, Roosevelt ordered an effort to obtain an atomic weapon before At first, this program was led by Vannevar Bush, head of the National Defense Research committee and the Office of Scientific Research and Development. Then it came under control of Leslie Groves of the Army Corps of Engineers. Groves qui
isotopes of 235 and 238 of the same element). Hanford, Washington, where U-238 was blasted with neutrons to make plutonium. It was then sent to Los a policy of resistance to the end. Word of their surrender finally reached Washington on August 10th. damaged. The bomb weighed 9,700 pounds. It detonated 1900 feet above the city, and exploded with a force though it missed the target, it devastated the city and killed about 40,000 people, and injured 60,000 However, several other countries are believed to have some nuclear weapons, like Israel and South bomb was produce and sent to Los Alamos, where it was made into a gun-type weapon. One small piece of Missile Range on July 16, 1945. This bomb was used on Nagasaki, Japan, on August 9, 1945. In general, the Hydrogen Bomb was like an atomic bomb with a Hydrogen fuel. The fuel would fusion is the U-238 isotope, and only .7% is the lighter, more "fissionable" isotope U-235. Next, he gathered Charles Sweeney) on Nagasaki, Japan on August 9, 1945, at 11:01 a.m. The original target was Kokura When the "uranium based" atomic bomb, (nick-named Little Boy), was dropped (by the Enola Gay , flown by Colonel Paul Tibbets), on Hiroshima, Japan, on August 6, 1945, at 8:15 a.m., five square miles very dense supercritical mass, that in chain reaction lasted long enough for a large and destructive
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