Question

What is the force, in terms of Coulomb's constant, between two electrical charges of `2 C` and `39 C` that are `12 m` apart?

Answer 1

I found: `0.5k` `C^2/m^2`

Explanation:

We can write the force as:
`F_(1,2)=k(|q_1*q_2|)/r^2`
where:
`k` is the Coulomb's Constant
`r` is the separation.
with our data:
`F_(1,2)=k(2*39)/12^2=0.5k` `C^2/m^2`