Robert Bushnell wrote in USMA 20994: > 2002 July 12 >Madan; > In 20959 you tell Claire to give energy in units of TWH. > >This is wrong. The watt hour is allowed only for electricity. > >Energy is given in multiples of joule. > >Further, the symbol for hour is h, not H. > > Robert Bushnell
Nonsense! The watt is the SI derived unit for all kinds of power - mechanical, electrical or thermal. Agreed that the joule is the SI derived unit of energy and is equal to the watt second, again not exclusively electrical. The watt hour is a non-SI unit accepted for use with the International System. The amp�re is the SI electrical base unit and all SI electrical derived units involve the amp�re. Joseph B.Reid 17 Glebe Road West Toronto M5P 1C8 Tel. 416 486-6071
