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aerodynamics

(Encyclopedia)aerodynamics, study of gases in motion. As the principal application of aerodynamics is the design of aircraft, air is the gas with which the science is most concerned. Although aerodynamics is primar...

Michelson, Albert Abraham

(Encyclopedia)Michelson, Albert Abraham mīˈkəlsən [key], 1852–1931, American physicist, b. Strelno, Prussia, grad. Annapolis, 1873, and studied at Berlin, Heidelberg, and Paris. He was professor of physics at...

Varda, Agnès

(Encyclopedia)Varda, Agnès änyĕsˈ värdäˈ [key] 1928–2019, French filmmaker, b. Brussels. Varda began her career as a theatrical photographer (1951–61) and photojournalist. Her first film, La Pointe Court...

Black, Timuel Dixon, Jr.

(Encyclopedia) Black, Timuel Dixon, Jr., 1918-2021, American social activist and community organizer, b. Birmingham, Al., Roosevelt Univ. (B.A., 1952), Univ. of ...

Coney Island

(Encyclopedia)Coney Island kōˈnē [key], beach resort, amusement center, and neighborhood of S Brooklyn borough of New York City, SE N.Y., on the Atlantic Ocean. The tidal creek that once separated the island fro...

Guadalquivir

(Encyclopedia)Guadalquivir gwäˌᵺälkēvērˈ [key], river, c.350 mi (560 km) long, rising in the Sierra de Cazorla, SE Spain, and flowing generally SW past Córdoba and Seville into the Atlantic Ocean near Sanl...

Geneva, Lake

(Encyclopedia)Geneva, Lake, Fr. Lac Léman läk lāmäNˈ [key], crescent-shaped lake, 224 sq mi (580 sq km), c.45 mi (70 km) long, on the Swiss-French border, between the Alps and the Jura mts. About 134 sq. mi. a...

navigable water

(Encyclopedia)navigable water, in the broadest sense, a stream or body of water that can be used for commercial transportation. When, as in the early common law, the term is restricted to waters affected by tides, ...

Kiel Canal

(Encyclopedia)Kiel Canal, artificial waterway, 61 mi (98 km) long, in Schleswig-Holstein, N central Germany, connecting the North Sea with the Baltic Sea. At sea level, the canal extends from Kiel on the Baltic to ...

light

(Encyclopedia)light, visible electromagnetic radiation. Of the entire electromagnetic spectrum, the human eye is sensitive to only a tiny part, the part that is called light. The wavelengths of visible light range ...