http://img240.imageshack.us/img240/7827/75926219lv4.th.jpg [Broken]
Updated. You have to pretty darn close. Cengage is picky. one one problem I was slightly over 1% off and it didn't take my answer.
Homework Statement
http://img183.imageshack.us/img183/7473/56823155cm1.th.jpg [Broken]
Lets all the top positive 6 microC charge, 'A', and the bottom right negative -4.2 charge 'B'.
Homework Equations
E = F / q
F= Ke q1q2
--------
r2
The Attempt at a Solution
I...