Columbia Encyclopedia

(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...

(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 ...

(Encyclopedia) Joule's law: see thermoelectricity. ...

(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...

(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...

(Encyclopedia) Prescott prĕsˈkət [key], town (1991 pop. 4,512), SE Ont., Canada, on the St. Lawrence River, opposite Ogdensburg, N.Y. Fort Wellington, built during the War of 1812, is now a military museum. At ne...

(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...

(Encyclopedia) Prescott, Edward Christian, 1940–, American economist, b. Glen Falls, N.Y., Ph.D. Carnegie Mellon Univ., 1967. Prescott has taught at Carnegie Mellon (1971–80), the Univ. of Minnesota (1980–98, ...

(Encyclopedia) Prescott, William Hickling, 1796–1859, American historian, b. Salem, Mass. He entered his father's law office, but was compelled by a serious eye injury to abandon law. He received medical attention...

(Encyclopedia) Prescott, William, 1726–95, American Revolutionary officer, b. Groton, Mass. He saw service in the French and Indian Wars. In the American Revolution, he fortified (1775) Breed's Hill for the coloni...