1. The problem statement, all variables and given/known data A classical view of the electron pictures it as a purely electric entity, whose Einstein rest mass energy,E = mc^2 is the energy stored in its electric field. If the electron were a sphere with charge distributed uniformly over its surface, what radius would it have in order to satisfy this condition? Note: Your answer for the electron's "size" isn't consistent with modern quantum mechanics or with experiments that suggest the electron is a true point particle. Equations : E = mc^2 F = qE F = ma E_sphere = Q/ (2*pi*r*epsilon_0); U = 1/2CV^2 U = qV I am not sure what to equate with E = mc^2 ?