A neutron in a reactor makes an elastic head on collision with the nucleus of an atom initially at rest. Assume: The mass of the atomic nucleus is…

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1a: A neutron in a reactor makes an elastic head on collision with the nucleus of an atom initially at rest. Assume: The mass of the atomic nucleus is about 12.6 the mass of the neutron. What fraction of the neutron’s kinetic energy is transferred to the atomic nucleus?
2a: If the initial kinetic energy of the neutron is 9.24 x 10^-13 J, find its final kinetic energy. Answer in units of J
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