Lec 20 - University of California, Berkeley Engineering 124...

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University of California, Berkeley Professor Kastenberg Engineering 124 Impacts of Technology on Society Engineering 124 Lecture 20 4/5/7 Nuclear Fission o Neutral charge neutron interacts with Uranium 235 o Results in product x, product y, and another neutron o X and Y were Latium and Barium Sum of the weight is slightly less than weight for the original Uranium 235 and neutron The remaining mass is converted to energy as explained in Einstein’s e=mc 2 The big bang suggests energy was converted to mass and now fission is the other way by taking the mass apart and liberating some of the energy o The Hydrogen Bomb Fusion of Deuterium and Tritium Nucleus to liberate 14MeV per fusion 1 D 2 + 1 T 3 2 He 4 + 0 n 1 Yields Helium and neutron The Atomic Bomb The ones dropped in Japan o A Plutonium Atomic Bomb o A Uranium Atomic Bomb Modern devices Fission first then Fusion Second Deuterium + Tritium Plutonium Iran is believed to be developing a Uranium Atomic Bomb
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Lec 20 - University of California, Berkeley Engineering 124...

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