The negative charge q3 exerts an attractive force F 13 on the positive charge q. The distance between these two charges is r13 = 0.100 m, so we have F13 = Ke Submit = 1911931 2 = 13 (8.99 x 109 N m/c)- x 10-5 N. Skip (you cannot come back) -18 c) x 10-18 m