User:JHUgirl/My first subpage

- The Joule is the SI unit of energy. (often called E for energy, U for energy, W for work. unit is J for Joule)

The Coulomb is SI unit of charge. (ofen called q, Q; unit is )

One Joule equals one Newton-meter since work (an energy) is $$U=F\Delta\ell \cos(\theta)$$

The Ampere is one Coulomb per second. The symbol is usually I and units are A (amps).

Ohm's Law is easy. Current density