1. The problem statement, all variables and given/known data I just have a quiz, but i don't get this question this is all i can remember A=-4.0*10^-6C B=+2.5*10^-6C mass of sphere: 51g initial separated distance:10.0cm If A and B touch and then repel, what is the new separated distance After they touch, Tension force on the string is 0.578N this is the picture after they touch http://img10.imageshack.us/img10/5527/26792246.jpg [Broken] 2. Relevant equations Fe=(kq1q2)/r2 F=mg? 3. The attempt at a solution I don't get this question at all, but i know i need to find the force first... After they touch, the electron divide equally, so +2.5*10^-6 neutralize -2.5*10^-6, 1.5*10^-6 left, and divide by 2 is 0.75*10^-6 am i right?