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James Prescott Joule FRS FRSE (/ dʒ uː l /; 24 December 1818 – 11 October 1889) was an English physicist, mathematician and brewer, born in Salford, Lancashire. Joule studied the nature of heat, and discovered its relationship to mechanical work .
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.
From 1841 to 1847 Joule worked steadily on measuring the heat produced by electrical processes (Joule's Law), mechanical processes (rotating paddles churning water or mercury), and frictional processes (the rubbing of materials together, as Count Rumford had done in 1798).
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.
James Prescott Joule (1818–89) is now rightly revered as one of the greatest scientists in the history of physics, due to his groundbreaking work in thermodynamics. However, this was not always the case—in his younger years, Joule struggled to be taken seriously by the scientific establishment.
Joule, James (1818-1889) English physicist who was initially interested in the efficiency of electric motors. He discovered the heat dissipated by a resistor is given by Q = I2Rt (where I is the current, R the resistance, and t the time ), a result now known as Joule's law.
Quick Reference. (1818–89) British physicist. In 1840 he discovered the relationship between electric current passing through a wire, its resistance, and the amount of heat produced. In 1849 he gave an account of the kinetic theory of gases, and a year later announced his best-known finding, the mechanical equivalent of heat.
