What 2 variables does coulomb's law have?

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present