Columbia Encyclopedia

Search results

500 results found

absolute zero

(Encyclopedia)absolute zero, the zero point of the ideal gas temperature scale, denoted by 0 degrees on the Kelvin and Rankine temperature scales, which is equivalent to −273.15℃ and −459.67℉. For most gase...

Eddington, Sir Arthur Stanley

(Encyclopedia)Eddington, Sir Arthur Stanley, 1882–1944, British astronomer and physicist. He was chief assistant (1906–13) at the Royal Observatory, Greenwich, and was from 1913 Plumian professor of astronomy a...

kinetic art

(Encyclopedia)kinetic art, term referring to sculptured works that include motion as a significant dimension. The form was pioneered by Marcel Duchamp, Naum Gabo, and Alexander Calder. Kinetic art is either nonmech...

buoy

(Encyclopedia)buoy boi, bo͞oˈē [key], float anchored in navigable waters to mark channels and indicate dangers to navigation (isolated rocks, mine fields, cables, and the like). The shape, color, number, and mar...

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 ...

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...

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...

center of mass

(Encyclopedia)center of mass, the point at which all the mass of a body may be considered to be concentrated in analyzing its motion. The center of mass of a sphere of uniform density coincides with the center of t...

Kropotkin, Piotr Alekseyevich, Prince

(Encyclopedia)Kropotkin, Piotr Alekseyevich, Prince pyôˈtər əlyĭksyāˈĭvĭch krəpôtˈkĭn [key], 1842–1921, Russian geographer and anarchist. He came from a wealthy princely family and as a boy was a pag...

Zurbarán, Francisco de

(Encyclopedia)Zurbarán, Francisco de fränthēsˈkō ᵺā tho͝orbäränˈ [key], 1598–1664, Spanish baroque painter, active mainly at Llerena, Madrid, and Seville. One of the finest painters of 17th-century Sp...