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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...

voice, sound produced by living beings

(Encyclopedia)voice, sound produced by living beings. The source of the sound in human speaking and singing is the vibration of the vocal cords, which are inside the larynx, and the production of the sounds is call...

Cherenkov radiation

(Encyclopedia)Cherenkov radiation or Cerenkov radiation [for P. A. Cherenkov], light emitted by a transparent medium when charged particles pass through it at a speed greater than the speed of light in the medium. ...

Edgerton, Harold

(Encyclopedia)Edgerton, Harold, 1903–90, American inventor and educator, b. Fremont, Nebr. He was educated at the Univ. of Nebraska and the Massachusetts Institute of Technology (D.Sc., 1931), and taught at the l...

acetic acid

(Encyclopedia)acetic acid əsēˈtĭk [key], CH3CO2H, colorless liquid that has a characteristic pungent odor, boils at 118℃, and is miscible with water in all proportions; it is a weak organic carboxylic acid (s...

Hollywood

(Encyclopedia)Hollywood. 1 Community (2020 population 35,757) within the city of Los Angeles, S Calif., on the slopes of the Santa Monica Mts.; inc. 1903, ...

Bassett, Angela Evelyn

(Encyclopedia) Bassett, Angela Evelyn 1958- , American actress, b. New York, N.Y., Yale Univ. (B.A., 1980; M.F.A., 1983; D.F.A. (2018, hon.). Bassett’s parents ...

television

(Encyclopedia)CE5 Video transmission and reception of color and black-and-white television: The camera lens focuses collected light rays into mirrors, which separate the image into its three primary color compon...

Hine, Lewis

(Encyclopedia)Hine, Lewis (Lewis Wickes Hine), 1874–1940, American photographer, b. Oshkosh, Wis. Hine dedicated much of his photographic career, which began shortly after he bought his first camera in 1903, to e...

energy

(Encyclopedia)CE5 Relations between potential energy (PE) and kinetic energy (KE) for a swinging pendulum energy, in physics, the ability or capacity to do work or to produce change. Forms of energy include hea...