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activation energy

(Encyclopedia)CE5 Energy profile of an exothermic reaction: Although the total energy of the products is less than that of the reactants, the activation energy must be added to weaken or break existing bonds bef...

collective farm

(Encyclopedia)collective farm, an agricultural production unit including a number of farm households or villages working together under state control. The description of the collective farm has varied with time and...

Amazon, river, Peru and Brazil

(Encyclopedia)Amazon, Port. Amazonas ämäzōˈnəs [key], world's second longest river, c.3,900 mi (6,280 km) long, formed by the junction in N Peru's Andes Mts. of two major headstreams, the Ucayali and the short...

Morris, William

(Encyclopedia)Morris, William, 1834–96, English poet, artist, craftsman, designer, social reformer, and printer. He has long been considered one of the great Victorians and has been called the greatest English de...

Long Island, island, United States

(Encyclopedia)Long Island (1990 pop. 6,861,454), 1,723 sq mi (4,463 sq km), 118 mi (190 km) long, and from 12 to 20 mi (19–32 km) wide, SE N.Y.; fourth largest island of the United States and the largest outside ...

Jacksonville

(Encyclopedia)Jacksonville. 1 City (1990 pop. 29,101), Pulaski co., central Ark., inc. 1941. The city has varied industries, including printing and publishing and the manufacture of electronic equipment, ordnance, ...

Palladio, Andrea

(Encyclopedia)Palladio, Andrea ändrĕˈä päl-läˈdēō [key], 1508–80, Italian architect of the Renaissance. Originally a stonemason, he was trained as an architect in Vicenza, and later in Rome he examined t...

bell, musical instrument

(Encyclopedia)CE5 Bell bell, in music, a percussion instrument consisting of a hollow metal vessel, often cup-shaped with an outward-flaring rim, damped at one end and set into vibration by a blow from a clappe...

Spielberg, Steven

(Encyclopedia)Spielberg, Steven, 1946–, American film director, b. Cincinnati, Ohio. Spielberg began his career as a television director, admired for his understanding portrayal of human character. His film Jaws ...

Waugh, Evelyn Arthur St. John

(Encyclopedia)Waugh, Evelyn Arthur St. John ēvˈlĭn, sĭnˈjən wô [key], 1903–66, English writer, considered the greatest satirist of his generation. Educated at Oxford, he was briefly an art student and a te...