Write Coulomb's law in vector form and explain the terms.

Explanation

`vecF=(1)/(4piepsilon_(0))(q_(1)q_(2))/(r^(2))hatr_(21)`
`q_(1)q_(2)` are the two point charges
r is the distance between two charges
`hatr_(21)` is the unit vector directed from `q_(2)` to `q_(1)`.