PHYSICISTS A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site Joule, James Prescott (1818–1889) British physicist who showed that heat energy and mechanical energy are equivalent and hinted at the law of conservation of energy. From 1852 he and William Thomson (Lord Kelvin) performed a series of experiments in thermodynamics, especially the Joule-Thomson effect. The joule (unit) is named for him. See also Joule's laws. Related category    • PHYSICISTS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP