What is the force between two electrons separated by 1 micro ampere?

F = kq1q2/d2, where F is force, k is a constant, 9.0 x 109 N • m2 / C2 in air, q1 and q2 are 1.60 x 10-19 Coulombs, the fundamental charge of an electron, and d is the distance between the electrons in meters.

F = (9.0 x 109 N • m2 / C2)(1.60 x 10-19C)(1.60 x 10-19C)/1m2 = 2.304 x 10-28 N