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Mackenzie

(Encyclopedia)Mackenzie, river, c.1,120 mi (1,800 km) long, issuing from Great Slave Lake, Northwest Territories, Canada, and flowing generally NW to the Arctic Ocean through a great delta. Between Great Slave Lake...

Lenz's law

(Encyclopedia)Lenz's law, physical law, discovered by the German scientist H. F. E. Lenz in 1834, that states that the electromotive force (emf) induced in a conductor moving perpendicular to a magnetic field tends...

Canada Act

(Encyclopedia)Canada Act, also called the Constitutional Act of 1982, which made Canada a fully sovereign state. The British Parliament approved it on Mar. 25, 1982, and Queen Elizabeth II proclaimed it on Apr. 17,...

affluent society

(Encyclopedia)affluent society, term coined by John Kenneth Galbraith in The Affluent Society (1958) to describe the United States after World War II. An affluent society, as the term was used ironically by Galbrai...

McCarthy, Gina

(Encyclopedia) McCarthy, Gina (Regina McCarthy), 1954- , American environmentalist and government official, Brighton, Ma., Univ. of Ma., Boston (B.A., 1976), Tufts U...

Edmonton

(Encyclopedia)Edmonton ĕdˈməntən [key], city, provincial capital, central Alta., Canada, on the North S...

Chhattisgarh

(Encyclopedia)Chhattisgarh, state (2001 provisional pop. 20,795,956), 52,200 sq mi (135,194 sq km), central India; created from SE Madhya Pradesh in 2000. Most of Chhattisgarh lies in the valley of the Mahanadi and...

General Land Office

(Encyclopedia)General Land Office, established (1812) in the U.S. Treasury Dept. and transferred (1849) to the U.S. Dept. of the Interior. Empowered to survey, manage, and dispose of the public domain, the office a...

perpetual-motion machine

(Encyclopedia)perpetual-motion machine, device that would be able to operate continuously and supply useful work, in violation of the laws of thermodynamics. A machine that would produce more energy in the form of ...

Great Limpopo Transfrontier Park

(Encyclopedia)Great Limpopo Transfrontier Park, c.13,500 sq mi (35,000 sq km; roughly the size of Belgium), the largest multinational park in S Africa and one of the largest parks in the world, in NE South Africa, ...