An unstable Pu-240 nucleus (mass 240.002 u) is at rest when it fissions into two Ag-120 nuclei (mass 119.893 u) which then fly off far from each other. Find the final kinetic energy of one Ag-120 nucleus when it is far from the other one. (1u = 1 atomic mass unit = 1.66 x 10E27 kg)