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, gos 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 SHe + energy Fianlly, *He is produced by fusing two 3He nuclei together: 3He + 3He *He + p + p + energy What is the total energy released during the creation of one \"4He nucleus? Give your answer in MeV, and remember that you need to make two 3He 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 How many half-lives must elapse until 89.0% of a radioactive sample of atoms has decayed? (Note that there is no unit for this answer.) 2052 - Q NGB G RU 0nn0