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The Manhattan Project

The Manhattan Project. "Now I am become death, the destroyer of worlds.". The Gadget. The “Gadget” was the test bomb developed for the Trinity test The “Gadget” is a plutonium device like the “Fat Man” dropped on Nagasaki. "Now I am become death, the destroyer of worlds." .

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The Manhattan Project

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  1. The Manhattan Project • "Now I am become death, the destroyer of worlds."

  2. The Gadget • The “Gadget” was the test bomb developed for the Trinity test • The “Gadget” is a plutonium device like the “Fat Man” dropped on Nagasaki.

  3. "Now I am become death, the destroyer of worlds." • On July 16, 1945, at 5:29:45 AM, a light "brighter than a thousand suns," filled the valley. As the now familiar mushroom cloud rose in to the sky. • The "Gadget" had a yield equivalent to 19 kilotons of TNT.

  4. Trinity • This is the first testof an atomic device • No one knew what to expect

  5. A view of the blast

  6. The effects of the Blast • Since the Trinity device was fired from a tower, the fireball created by the explosion touched the ground and vaporized large amounts of soil. These heavy particles, highly radioactive, precipitated out of the cloud quickly, causing a fair amount of local fallout. The explosion vaporized a crater ten feet deep and a half-mile wide and left a thin layer of radioactive glass (Trinitite).

  7. Effects of a blast

  8. Little Boy • A uranium device. • Two bits of uranium 235 are shot together to make the explosion • This type of device had not been tested. • Dropped on Hiroshima

  9. Hiroshima • 90,000 people killed instantly • 100,000 wounded • Spontaneous combustion of wooden structures up to two miles away

  10. Hiroshima after the blast

  11. Hiroshima after the blast

  12. Hiroshima after the blast

  13. Hiroshima after the blast

  14. Fat Man • A plutonium device • The same implosion-type bomb as the “Gadget” • Dropped on Nagasaki

  15. The amount of plutonium in “Fat Man”

  16. Nagasaki • 286,000 people living in Nagasaki at the time of the blast • 74,000 were killed instantly • 75,000 sustained severe injuries

  17. Nagasaki after the blast

  18. Nagasaki after the blast

  19. Nagasaki after the blast

  20. Nagasaki after the blast

  21. Bikini Island Test • No one was living on the Bikini atoll at the time of the BRAVO blast. However, a total of 236 people were living on the atolls of Rongelap and Utirik, 100 and 300 miles east of Bikini, respectively. The residents of Rongelap were exposed to as much as 200 rems of radiation. They were evacuated 24 hours after the detonation. The residents of Utirik, which were exposed to lower levels of radiation, were not evacuated until at least two days later. After their evacuation, many experienced typical symptoms of radiation poisoning; burning of the mouth and eyes, nausea, diarrhea, loss of hair, and skin burns. • Ten years after the blast the first thyroid tumors began to appear. Of those under twelve on Rongelap at the time of BRAVO, 90% have developed thyroid tumors. In 1964, the U. S. Government admitted responsibility for exposing the islanders to radiation and appropriated funds to compensate them.

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