1. The problem statement, all variables and given/known data two equal charges repel one another with a f = 4.0x 10^-4N when they are 10cm apart. If they are moved until the separation is 5.0 cm, the repulsive force is... 2. Relevant equations f= kq1q2/r^2 3. The attempt at a solution I already calculated and I just would like someone to tell me if 16x10^-4 seems correct. I calculated q to then find force at 5.0cm. Is that right?