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hydraulic machine

(Encyclopedia)CE5 Hydraulic pressure: In any hydraulic device the pressure exerted by one piston is transmitted throughout the fluid. Since pressure equals force divided by area, a small force (F1) exerted on a ...

heat

(Encyclopedia)heat, nonmechanical energy in transit, associated with differences in temperature between a system and its surroundings or between parts of the same system. The study of heat and its relationship ...

fuel

(Encyclopedia)fuel, material that can be burned or otherwise consumed to produce heat. The common fuels used in industry, transportation, and the home are burned in air. The carbon and hydrogen in fuel rapidly comb...

Arthurian legend

(Encyclopedia)Arthurian legend, the mass of legend, popular in medieval lore, concerning King Arthur of Britain and his knights. Although there are innumerable variations of the Arthurian legend, the basic story...

heroin

(Encyclopedia)heroin hĕˈrəwən [key], opiate drug synthesized from morphine (see narcotic). Originally produced in 1874, it was thought to be not only nonaddictive but useful as a cure for respiratory illness an...

Jerusalem

(Encyclopedia)Jerusalem jəro͞oˈsələm, –zələm [key], Heb. Yerushalayim, Arab. Al Quds, city (1994 pop. 578,800), capital of Israel. East Jerusalem is also claimed by Palestinians as a future capital, and mo...

American literature

(Encyclopedia)American literature, literature in English produced in what is now the United States of America. The years immediately after World War I brought a highly vocal rebellion against established socia...

African art

(Encyclopedia)African art, art created by the peoples south of the Sahara. The predominant art forms are masks and figures, which were generally used in religious ceremonies. The decorative arts, especially in text...

Hebrew literature

(Encyclopedia)Hebrew literature, literary works, from ancient to modern, written in the Hebrew language. The rise of Zionism, particularly reflected in the writings of Ahad Ha-am (Asher Ginzberg), gave Hebrew ...

children's book illustration

(Encyclopedia)children's book illustration, any type of picture or decorative work produced for books specifically intended for a youthful audience. During the 1960s a number of seldom-used techniques were introd...