1. The problem statement, all variables and given/known data Charge A and charge B are 3.00 m apart, and charge A is +2.00 C and charge B is +3.00 C. Charge C is located between them at a certain point and the force on charge C is zero. How far from charge A is charge C? 2. Relevant equations 3. The attempt at a solution I am reviewing for my final and I can't remember how to do this!!! I wanted to use... F = K*Q1*Q2 / r^2 But I can't have 0 in the denominator so I know I am missing something obvious...but I am not seeing it.