A neutron in a reactor makes an elastic headon collision with the nucleus of an atom initially at rest. assume: the mass of the atomic nucleus is about 12.9 the mass of the neutron. what fraction of the neutron’s kinetic energy is transferred to the atomic nucleus? 017 (part 2 of 2) 10.0 points if the initial kinetic energy of the neutron is 2.51 × 10−13 j, find its final kinetic energy. answer in units of j.
