Find the electric force between two protons separted by a distance of 1 fermi `(1fermi = 10^(15)m).` The protons in a nucleus remain at a separaton of this order.

Explanation

`Charge on each proton =1.6xx10^-19 `
` Coulomb `
` Distance between the charges=10^-15m `
` F_e=(1)/(4piepsilon_0)xx(q^2)/r^2 `
` =(9xx10^9)xx(1.6xx10^-19)^2/(10^-15)^2 `
` =230N`