Two `alpha` particles are separated by a distance of 4 fermi (in air). Find the Columbian force between them.

Explanation

(i) An `alpha` particle consists of two protons and two neutrons.
Determine the charge of each `alpha` particle as
`q = n xx e`
where n is the number of protons and e is the charge of each proton.
convert 1 Fermi into meters.
Use the Coulomb's law
(ii) `57.6 N`.