Two identically charged spheres carry 1 C of charge each, and are 8 m apart. With what force will they repel each other? Recall that Coulomb's Constant is 9.0x109 N*m2/C2.

The equation of an electric field (with two charges) is this: 9*10^9 * q1 * q2/k^2

Ok, so if you plug in your givens, you will have:

/no need to include the units

9*10^9 * 1 * 1 / 8^2 #keep solving

9*10^9 / 8^2

140625000