If the neutron eventually slows down to a kinetic energy of 0.025 eV, through repeated collisions with other atoms, it eventually comes into thermal equilibrium with its environment. In this case,...

If the neutron eventually slows down to a kinetic energy of 0.025 eV, through repeated collisions with other atoms, it eventually comes into thermal equilibrium with its environment. In this case, what is the average velocity of a free neutron when it nally reaches thermal equilibrium?