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Wyler, William

(Encyclopedia)Wyler, William, 1902–1981, American film director, producer, and writer, b. Mülhausen, Germany (now Mulhouse, France) as Willi Wilder. He came to the United States (1920) at the invitation of Carl ...

rotary engine

(Encyclopedia)rotary engine, internal-combustion engine whose cycle is similar to that of a piston engine, but which produces rotary motion directly without any conversion from reciprocating motion. A major problem...

viscosity

(Encyclopedia)viscosity, resistance of a fluid to flow. This resistance acts against the motion of any solid object through the fluid and also against motion of the fluid itself past stationary obstacles. Viscosity...

Bogdanovich, Peter

(Encyclopedia) Bogdanovich, Peter, 1939 - 2021, American film director, actor, and critic, b. Kingston, N.Y. Bogdanovich was the son of Serbian immigrants. He studie...

Steinbeck, John

(Encyclopedia)Steinbeck, John, 1902–68, American writer, b. Salinas, Calif., studied at Stanford. He is probably best remembered for his strong sociological novel The Grapes of Wrath, considered one of the great ...

momentum

(Encyclopedia)momentum mōmĕnˈtəm [key], in mechanics, the quantity of motion of a body, specifically the product of the mass of the body and its velocity. Momentum is a vector quantity; i.e., it has both a magn...

Copernican system

(Encyclopedia)Copernican system, first modern European theory of planetary motion that was heliocentric, i.e., that placed the sun motionless at the center of the solar system with all the planets, including the ea...

Barnard's star

(Encyclopedia)Barnard's star, star with the largest observed proper motion (rate of motion across the sky with respect to other stars); located in the constellation Ophiuchus. The star's large proper motion, 10.28�...

Elgin, city, United States

(Encyclopedia)Elgin ĕlˈjĭn [key]. <1> City (2020 pop. 114,797), Cook and Kane counties, NE Ill., o...

Lloyd, Norman

(Encyclopedia)Lloyd, Norman, 1914-2021, American film and TV actor and director, b. Jersey City, N.J, as Norman Perlmutter. Lloyd began his stage career at age 9 appe...