Problem 1: 1. The problem statement, all variables and given/known data What is the electric field at a point midway between a -8.64uC and 6.97uC charge 7.63 cm apart? Take the direction towards the positive charge to be positive and assume no other charges nearby. 2. Relevant equations E=kQ/r2 3. The attempt at a solution So what I've been doing is finding the strengths of the electric fields for each charge at the midpoint, which is .03185 m, and then adding them together. e.g. E1=k(6.97*10-6)/(.031852) E2=k(-8.64*10-6)/(.031852) I get -1.48*107, when the answer ought to be -9.56*107 What am I doing wrong?