A neutron in a nuclear reactor makes an elastic, head-on collision with the nucl

Question

A neutron in a nuclear reactor makes an elastic, head-on collision with the nucleus of a carbon atom initially at rest. (a) What fraction of the neutron's kinetic energy is transferred to the carbon nucleus? (The mass of the carbon nucleus is about 12.0 times the mass of the neutron.) I know that the fraction is 28% What i cant find is the second part of the question (b) The initial kinetic energy of the neutron is 2.30 10-13 J. Find its final kinetic energy and the kinetic energy of the carbon nucleus after the collision. neutron J carbon nucleus J Please Provide me with the correct answers, not a copy paste from previous ones thanks

Explanation / Answer

initial energy of neutron=k J energy transferred to carbon nucleus=0.28k J energy remaining with neutron=0.72k J k=2.3x10^-13 substitute k and get the answer

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