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A neutron in a nuclear reactor makes an elastic head-on collision with the nucleus of a...

A neutron in a nuclear reactor makes an elastic head-on collision with the nucleus of a lead atom initially at rest. (a) What fraction of the neutron's kinetic energy is transferred to the lead nucleus? (The mass of the lead nucleus is about 207 times the mass of the neutron.) (b) If the initial kinetic energy of the neutron is 1.80 10-13 J, find its final kinetic energy and the kinetic energy of the lead nucleus after the collision. neutron J carbon nucleus J

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