At the beginning of an experiment, two identical metal balls (radius 0.1 m) are neutral and considered to be at zero electrical potential. They are located far apart (5 m). Electrons are transferred by a mechanical technique from ball A to ball B, such that the system of balls and apparatus is isolated from the environment. After the transfer, ball A has acquired a potential of 10,000 volts and ball B a potential of –10,000 volts. Now, how much work is required to transfer 10–10 C from ball A to B?