- joule, J, watt second - a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second
--1 is a kind of work unit, heat unit, energy unit
--1 has parts: erg - J - the 10th letter of the Roman alphabet
--2 is a kind of letter, letter of the alphabet, alphabetic character
--2 is a member of Roman alphabet, Latin alphabet