Two small identical conduct$-$ ing spheres are placed with their centers $0\mathrm{.}30$ m apart. One is given a charge of$1231029$ C$,$theotherachargeof$21831029$ C$.($a$)$ Find the electrostatic force exerted on one sphere by the other. $($b$)$ The spheres are connected by a con$-$ ducting wire. Find the electrostatic force between the two after equilibrium is reached, where both spheres have the same charge.