A neutron moving with a certain kinetic energy collides head on with an atom of mass number A.The fractional kinetic energy retained by it is

A neutron travelling with a velocity v and kinetic energy E collides elastically head on with the nucleus of an atom of mass number A at rest. The fraction of total energy retained by the neutron is :

A neutron travelling with a velocity collides elastically, head on, with a nucleus of an atom of mass number A at rest. The fraction of total energy retained by neutron is

A neutron collides head-on and elasticity with an atom of mass number A , which is initially at rest. The fraction of kinetic energy retained by neutron is

A neutron travelling with a velocity v and kinetic energy E collides perfectly elastically head on with the nucleus of an atom of mass number A at rest. The fraction of the total kinetic energy retained by the neutron is

A neutron moving at a speed v undergoes a head-on elastic collision with a nucleus of mass number A at rest. The ratio of the kinetic energies of the neutron after and before collision is :

A particle of mass m travelling with velocity v and kinetic energy E collides elastically to another particle of mass nm , at rest. What is the fraction of total energy retained by the particle of mass m ?