A Uranium Nucleus Fissions in Two Spherical Fragments of Charge

Multiple Choice

A uranium nucleus fissions in two spherical fragments of charge 38e and 54e and radii 5.5 * 10^-15 m and 6.2 *10^-15 m, respectively. Assume that the charge is distributed uniformly throughout the volumes, that just before separation each fragment is at rest, and that fragments surfaces are in contact. The electric potential energy of two spherical fragments in MeV (1 MeV = 1.6 *10^-13 J) is

A) 250 MeV.
B) 220 MeV.
C) 80 MeV.
D) 15 MeV.
E) 1.0 MeV.