Coulomb’s Law

Coulomb’s law describes force between charged particles (charged small bodies). 

$${\overrightarrow{F}}_2=\frac{1}{4\pi {\epsilon }_0\epsilon }\frac{q_1{q}_2}{r_{12}^3}{\overrightarrow{r}}_{12}$$

Here ${\epsilon }_0=8.85\cdot {10}^{-12}F/m$. All other variables in formula shown below pictures.