James Prescott Joule, English physicist and brewer (died 1889)

James Prescott Joule

English physicist (1818–1889)

James Prescott Joule was an English physicist. Joule studied the nature of heat and discovered its relationship to mechanical work. This led to the law of conservation of energy, which in turn led to the development of the first law of thermodynamics. The SI unit of energy, the…