James Prescott Joule (/ dʒuːl /; [1][2][a] 24 December 1818 – 11 October 1889) 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.

James Prescott Joule, English physicist who established that the various forms of energy, such as electrical and heat, are basically the same and can be changed one into another. Thus, he formed the basis of conservation of energy, the first law of thermodynamics. Learn more about Joule’s life …

James Prescott Joule studied the nature of heat and established its relationship to mechanical work. He laid the foundation for the theory of conservation of energy, which later influenced the First Law of Thermodynamics. He also formulated the Joule's law which deals with the transfer of …

James Prescott Joule (24 December 1818 – 11 October 1889) was an English physicist, born in Salford, near Manchester. In his time he had great contribution to the world of electricity and thermodynamics.

James Prescott Joule, (December 24, 1818 – October 11, 1889), Fellow of the Royal Society, was an English physicist, born in Sale, Cheshire. He discovered that heat and mechanical energy are inter-convertible, and that transformations from one to the other occur in a fixed proportion, known as the mechanical equivalent of heat.

James Joule was born in Salford, near Manchester, England, on December 24, 1818. He was the second son of a wealthy brewery owner and was educated at home by private tutors. For three years he was fortunate enough to have the eminent …

May 21, 2018 · The English physicist James Prescott Joule (1818-1889) proved that mechanical and thermal energies are interconvertible on a fixed basis, and thus he established the great principle of conservation of energy.

Parents: Benjamin Joule (1784–1858), a Salford brewer, and Alice (1788–1836), elder daughter of Thomas and Grace Prescott of Wigan. Spouse: Amelia Grimes (d. 1854), daughter of John Grimes, (18 August 1847). Children: Benjamin Arthur, Alice Amelia, and Henry.

Sir James Prescott Joule (1818–1889) became one of the most significant physicists of the nineteenth century, although his original interest in science was as a hobby and for practical business purposes.

But an obscure home-schooled brewer’s son in the north of England, James Prescott Joule, was impressed by the celebrated cannon-boring experiments of Count Rumford, which showed that heat could be created continuously by the mechanical work of boring a cannon.