2. One +1.0 C (one coulomb) charge and another -1.0 C charge are located 1.0 m apart.

a. Calculate the magnitude of the electric force between them.
b. In what direction does the force act?

1 answer

like charges repel
opposite charges attract

F = k Q1Q2/d^2
k = 9*10^9
https://en.wikipedia.org/wiki/Coulomb%27s_law

so 9*10^9 Newtons