What units do physicists use to measure heat energy and electrical energy?

Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

How to calculate voltage drop in a series circuit