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canon, in music

(Encyclopedia)canon, in music, a type of counterpoint employing the strictest form of imitation. All the voices of a canon have the same melody, beginning at different times. Successive entrances may be at the same...

Wertheimer, Max

(Encyclopedia)Wertheimer, Max mäks vĕrtˈhīmər [key], 1880–1943, German psychologist, b. Prague. He studied at the universities of Prague, Berlin, and Würzburg (Ph.D., 1904). His original researches, while h...

weight lifting

(Encyclopedia)weight lifting, international sport, also a training technique for athletes in other sports. From the earliest times men have lifted weights as a test of strength. Long popular as a competitive sport ...

Kitt Peak National Observatory

(Encyclopedia)Kitt Peak National Observatory, astronomical observatory located southwest of Tucson, Ariz.; it was founded in 1958 under contract with the National Science Foundation and is administered by the Assoc...

Anaxagoras

(Encyclopedia)Anaxagoras ănˌəksăgˈərəs [key], c.500–428 b.c., Greek philosopher of Clazomenae. He is credited with having transferred the seat of philosophy to Athens. He was closely associated with many f...

Euler, Leonhard

(Encyclopedia)Euler, Leonhard lāˈônhärt oiˈlər [key], 1707–83, Swiss mathematician. Born and educated at Basel, where he knew the Bernoullis, he went to St. Petersburg (1727) at the invitation of Catherine ...

Renoir, Jean

(Encyclopedia)Renoir, Jean zhäN rənwärˈ [key], 1894–1979, French film director and writer, b. Paris; son of Pierre Auguste Renoir. He made his first film in 1926. Gathering around him a devoted coterie of act...

Baum, L. Frank

(Encyclopedia)Baum, L. Frank (Lyman Frank Baum) bôm [key], 1856–1919, American journalist, playwright, and author of children's stories, b. Chittenango, N.Y. He and his family moved to South Dakota in 1888, wher...

Bjerknes, Vilhelm Frimann Koren

(Encyclopedia)Bjerknes, Vilhelm Frimann Koren vĭlˈhĕlm frēˈmän kôˈrən byĕrkˈnĕs [key], 1862–1951, Norwegian physicist and pioneer in modern meteorology. He worked on applying hydrodynamic and thermody...

friction

(Encyclopedia)friction, resistance offered to the movement of one body past another body with which it is in contact. In certain situations friction is desired. Without friction the wheels of a locomotive could not...