(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…
(Encyclopedia) LuleälvLuleälvlüˈləĕlvˈ [key], river, c.275 mi (440 km) long, rising near the Norwegian border, Norrbotten prov., N Sweden, and flowing SE to the Gulf of Bothnia at Luleå. It has…
(Encyclopedia) fetishfetishfĕtˈĭsh [key], inanimate object believed to possess some magical power. The fetish may be a natural thing, such as a stone, a feather, a shell, or the claw of an animal, or…
(Encyclopedia) tractor, in agriculture, vehicle used to pull such equipment as plows, cultivators, and mowers; to power stationary devices such as saws and winches; and to push snowplows and earth-…
TURBINESFIND OUT MOREMany modern machines, from motorbikes to jet aircraft, are powered by engines. An engine is a machine that turns fuel into movement. The fuel is burned to generate heat…
Wrestling with Radicals
Algebra
Wrestling with Radicals Introducing the Radical Sign Simplifying Radical Expressions Unleashing Radical Powers Radical Operations Solving Radical Equations…
Empowering the National GovernmentThe Supreme CourtMarshall CourtMarshall Steps InTaking ControlEmpowering the National Government Now that Marshall had clearly established the Court's power…
Born: 1919Birthplace: New Haven, Conn. High-voltage, high-power semiconductor pin rectifier—Hall's invention boosted efficiency and reduced wasted power and destructive heat build-up in large-scale…
Selected records. Source: National Aeronautic AssociationGreat Circle Distance Without LandingInternational: 2,213.04 mi; 3,561.55 km.Robert G. Ferry (U.S.) in Hughes YOH-6A helicopter powered by…
