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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...Keats, Ezra Jack
(Encyclopedia)Keats, Ezra Jack, 1916–83, American author and illustrator of children's books, b. Brooklyn, N.Y., as Jacob Ezra Katz. During the Great Depression, he painted murals for the Works Progress Administr...frequency
(Encyclopedia)frequency: see harmonic motion; wave. ...Davies, Joseph Edward
(Encyclopedia)Davies, Joseph Edward dāˈvēz [key], 1876–1958, American diplomat, b. Watertown, Wis. Admitted to the bar in 1901, he was commissioner of corporations (1913–15) and chairman (1915–16) of the F...Phoebe, in astronomy
(Encyclopedia)Phoebe fēˈbē [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn IX (or S9), Phoebe is 137 mi (220 km) in diameter, orbits Saturn at a mean distance ...Zeno of Elea
(Encyclopedia)Zeno of Elea ēˈlēə [key], c.490–c.430 b.c., Greek philosopher of the Eleatic school. He undertook to support in his only known work, fragments of which are extant, the doctrine of Parmenides by ...Forman, Miloš
(Encyclopedia)Forman, Miloš, 1932–2018, Czech-American filmmaker, b. Čáslav, Czechoslovakia (now in the Czech Republic), asJan Tomáš Forman. He attended film school in Prague and worked as a screenwriter and...period, in physics
(Encyclopedia)period, in physics: see harmonic motion; wave. ...Denis, Maurice
(Encyclopedia)Denis, Maurice môrēsˈ dənēˈ [key], 1870–1943, French painter and writer on art. His paintings, usually on religious themes, have not proved so influential as his art theories. As the spokesman...perspective
(Encyclopedia)perspective, in art, any method employed to represent three-dimensional space on a flat surface or in relief sculpture. Although many periods in art showed some progressive diminution of objects seen ...Browse by Subject
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