Joule , James Prescott
(1818–1889) British physicist
Joule, the son of a brewer from Salford, received little formal education, was never appointed to an academic post, and remained a brewer all his life. He began work in a private laboratory that his father built near to the brewery.
His first major research was concerned with determining the quantity of heat produced by an electric current and, in 1840, Joule discovered a simple law connecting the current and resistance with the heat generated. For the next few years he carried out a series of experiments in which he investigated the conversion of electrical and mechanical work into heat. In 1849 he read his paper On the Mechanical Equivalent of Heat to the Royal Society. Joule's work (unlike that of Julius Mayer) was instantly recognized.
In 1848 Joule published a paper on the kinetic theory of gases, in which he estimated the speed of gas molecules. From 1852 he worked with William Thomson (later Lord Kelvin) on experiments on thermodynamics. Their best known result is theJoule–Kelvin effect – the effect in which an expanding gas, under certain conditions, is cooled by the expansion.

Scientists. . 2011.

Look at other dictionaries:

  • Joule,James Prescott — Joule (jo͞ol, joul), James Prescott. 1818 1889. British physicist who established the mechanical theory of heat and discovered the first law of thermodynamics. * * * …   Universalium

  • Joule, James Prescott — ▪ English physicist born December 24, 1818, Salford, Lancashire [now in Greater Manchester], England died October 11, 1889, Sale, Cheshire       English physicist who established that the various forms of energy mechanical, electrical, and heat… …   Universalium

  • Joule, James (Prescott) — born Dec. 24, 1818, Salford, Lancashire, Eng. died Oct. 11, 1889, Sale, Cheshire English physicist. After studying under John Dalton, in 1840 he described Joule s law, which stated that the heat produced in a wire by an electric current is… …   Universalium

  • Joule, James (Prescott) — (24 dic. 1818, Salford, Lancashire, Inglaterra–11 oct. 1889, Sale, Cheshire). Físico inglés. Después de estudiar bajo la guía de John Dalton, en 1840 describió la ley de Joule, la cual afirmaba que el calor producido en un alambre por una… …   Enciclopedia Universal

  • Joule, James Prescott — ► (1818 89) Físico británico. Estudió el efecto calorífico de la corriente eléctrica y encontró la equivalencia mecánica del calor …   Enciclopedia Universal

  • JOULE, JAMES PRESCOTT —    a celebrated physicist, born at Salford; was a pupil of Dalton s, and devoted his time to physical and chemical research; made discoveries in connection with the production of heat by voltaic electricity, demonstrated the equivalence of heat… …   The Nuttall Encyclopaedia

  • James Prescott Joule — James Joule James Prescott Joule (Salford, Mánchester, 24 de diciembre de 1818 Salford, 11 de octubre de 1889) fue un físico inglés. Fue u …   Wikipedia Español

  • James Prescott Joule — James P. Joule James Prescott Joule (* 24. Dezember 1818 in Salford bei Manchester; † 11. Oktober 1889 in Sale (Greater Manchester), Aussprache: dʒuːl[1]) war ein britischer Physiker …   Deutsch Wikipedia

  • James Prescott Joule — Pour les articles homonymes, voir Prescott et Joule (homonymie). James Prescott Joule James Prescott Joule Naissance …   Wikipédia en Français

  • James Prescott Joule — Infobox Scientist name = James Prescott Joule image width = 200px caption = James Joule English physicist birth date = birth date|1818|12|24 birth place = Salford, Lancashire, England death date = death date and age|1889|10|11|1818|12|24 death… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”