What is the force of repulsion between two charges of `1C` each, kept `1m` apart in vacumm ?

Calculate force between two charges of 1C each separated by 1m in vacuum.

What is the force of attraction between two masses each of 1 kg kept at a separation of 1 m?

What is the force between two small charged of 2 xx 10^(-7) C placed 30 cm apart in air?

What is the force between two small charged of 2 xx 10^(-7) C placed 30 cm apart in air?

The force of repulsion between two point charges is F, when these are at a distance of 1 m apart Now the point charges are replaced by spheres of radii 25 cm having the same charge as that of point charge and same distance apart. Then the new force of repulsion will