1. Two point charges 2.0cm apart have an electric potential energy -180 microjoules. The total charge is 30 nanocoulombs. What are the two charges? Givens: change in postition = 0.02m , Q = 30nC = 3.0e-8C, V = -180 microjoules = 1.8e-4 2. Relevant equations F = kq1q2/r^2 E = kq/r^2 3. The attempt at a solution E1 = (9.00e5) (3.0e-8C)/(0.02m^2)....?