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Question 1 The sun generates its energy through nuclear fusion, making helium from hydrogen. The main process by which this happens, called the proton-proton chain,

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Question 1 The sun generates its energy through nuclear fusion, making helium from hydrogen. The main process by which this happens, called the proton-proton chain, goes as follows: . Two protons come together to create deuterium, a positron, a neutrino, and energy: p + p - D + e + v + energy . The deuterium fuses with another proton to make *He: D + p - He + energy . Fianlly, He is produced by fusing two He nuclei together: He + He - He+ p+ p + energy What is the total energy released during the creation of one "He nucleus? Give your answer in MeV, and remember that you need to make two "He nuclei in the process. Be sure to use at least five significant figures for your masses, but your final answer should have three or four sig figs. Question 2 A sample of Cs has an activity of 17.4 Ci. What is the mass of the sample? Use the following tables for half-lifes and atomic masses (in atomc mass units)

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