# Need help with assignment force question

1. Jun 8, 2005

### Aprilshowers

I am stumped on this question. Can anyone advise?

The electric charge of an electron is -1.6 X 10 to the -19 power C.
What is the force exerted between two electrons separated by one meter?

2. Jun 8, 2005

### SGT

The electrostatic force between two charged particles is
$$F=\frac{q_1.q_2}{4\pi\epsilon_0.d^2}$$
where $$\epsilon_0$$ is the permitivity of free space and
$$\kappa = \frac{1}{4\pi\epsilon_0} = 8.9876.10^9 N m^2 C^{-2}$$

3. Apr 7, 2008