What is the ratio of electrostatic force and gravitational force between two electrons?

Calculate the ratio of electromagnetic force to gravitational force between two protns separated by some distance.

The ratio of gravitational force and electrostatic force between two electrons separated by a distance of 10 cm is of the order of 10 ^(42 )

The ratio of Coulomb force and Gravitational force between two charged particles is approximately equal to

What is work done by gravitational force between planet and sun?

If F_e and F_g are the electric and gravitational forces respectively between an electrons and proton situated at a distance apart , the ratio of F_e and F_g is of the order of