Two electrons have bene removed from each atom. Find the distance between two such atoms, if they repel each other with a fore of `8.8 xx 10^-9N`, when placed in free space.

Twenty electrons have been removed from each atom to form ions. Find the electrostatic force between two such ions when separated by a distance of 8overset@A in a medium of dielectric Constant4.

Ten electrons have been removed from each atom to form ions. Find the electrostatic force between two such ions when separated by a distance of 4overset@A in a medium of dielectric Constant 4.

Five electrons have been removed from each atom to form ions. Find the electrostatic force between two such ions when separated by a distance of 2overset@A in a medium of dielectric Constant4.

The distance between two equal balls having unlike charges is 2cm. The radii of the balls are much less than the distance between them. The balls attract each other with a force of 36xx10^(-5) N. After the ball have been connected by a wire and latter has been removed, the balls repel each other with a force of 20. 25xx10^(-5)N. Determine the original charges on the balls