1. The problem statement, all variables and given/known data Two charges are separated as shown. Where would you place a -3 microCoulombs (mC) charge such that the net force on this charge is 0? + + 4mC 8mC Distance between charges are 80cm apart. 2. Relevant equations F= (k*q1*q2) / (r*r) 3. The attempt at a solution I found out the Force on q1 ( i made q1 the 4mC charge and q2 the 8mC charger) to q2 it came to be 4.5*10^(-1) N. Same for the F for q2 on q1. Then i manipluated the equation to slove for r. Once that was established i but the -3mC charge in the equation with the 4mC charge and F being 4.5*10^(-1) giving me an approximation of .5m aka 50 cm. But that doesnt seem right, what equation im not using to get this answer?