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Joule, James Prescott
(Encyclopedia)Joule, James Prescott jo͞ol, joul [key], 1818–89, English physicist. His scientific researches began in his youth when he invented an electromagnetic engine. Joule made valuable contributions to th...green flash
(Encyclopedia)green flash or emerald flash, a refractive phenomenon of the atmosphere where the top edge of the setting (or, less frequently, rising) sun will momentarily turn emerald green. The green color lasts f...joule
(Encyclopedia)joule jo͞ol, joul [key], abbr. J, unit of work or energy in the mks system of units, which is based on the metric system; it is the work done or energy expended by a force of 1 newton acting through ...power, in physics
(Encyclopedia)power, in physics, time rate of doing work or of producing or expending energy. The unit of power based on the English units of measurement is the horsepower, devised for describing mechanical power b...thermoelectricity
(Encyclopedia)thermoelectricity, direct conversion of heat into electric energy, or vice versa. The term is generally restricted to the irreversible conversion of electricity into heat described by the English phys...watt
(Encyclopedia)watt [for James Watt], abbr. W, unit of power, or work done per unit time, equal to 1 joule per second. It is used as a measure of electrical and mechanical power. One watt is the amount of power that...Prescott, city, United States
(Encyclopedia)Prescott, city (1990 pop. 26,455), alt. 5,389 ft (1,643 m), seat of Yavapai co., central Ariz. in a mineral-rich area; inc. 1883. It is a mining and ranching center, a summer resort, and the headquart...erg
(Encyclopedia)erg ûrg [key], unit of work or energy in the cgs system of units, which is based on the metric system; it is the work done or energy expended by a force of 1 dyne acting through a distance of 1 centi...Robertson, William
(Encyclopedia)Robertson, William, 1721–93, Scottish churchman and historian. As moderator (1762–80) of the general assembly of the Church of Scotland, he led the moderate party and enforced the right of the sta...Prescott, Samuel
(Encyclopedia)Prescott, Samuel prĕsˈkət [key], 1751–c.1777, American Revolutionary figure, b. Concord, Mass. On the night of Apr. 18, 1775, he, Paul Revere, and William Dawes set out to warn the countryside of...Browse by Subject
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