Columbia Encyclopedia

Search results

326 results found

G

(Encyclopedia)G, 7th letter of the alphabet. It is a usual symbol for a voiced velar stop, as in the English go. It was originally a differentiated form of Greek gamma, which has C as its formal Roman correspondent...

march, in music

(Encyclopedia)march, in music, composition intended to accompany marching. The only constant characteristics of a march are duple meter and a fairly simple rhythmic design. In mood, marches range from the moving de...

transformer

(Encyclopedia)transformer, electrical device used to transfer an alternating current or voltage from one electric circuit to another by means of electromagnetic induction. The simplest type of transformer consists ...

motion

(Encyclopedia)motion, the change of position of one body with respect to another. The rate of change is the speed of the body. If the direction of motion is also given, then the velocity of the body is determined; ...

Hubble's law

(Encyclopedia)Hubble's law, in astronomy, statement that the distances between galaxies (see galaxy) or clusters of galaxies are continuously increasing and that therefore the universe is expanding. Hubble's law ...

gas laws

(Encyclopedia)gas laws, physical laws describing the behavior of a gas under various conditions of pressure, volume, and temperature. Experimental results indicate that all real gases behave in approximately the sa...

constipation

(Encyclopedia)constipation, infrequent or difficult passage of feces. Constipation may be caused by the lack of adequate roughage or fluid in the diet, prolonged physical inactivity, certain drugs, or emotional dis...

Parkes, Sir Henry

(Encyclopedia)Parkes, Sir Henry, 1815–96, Australian political leader, b. England. He emigrated to Australia in 1839 and later founded a newspaper, the Empire, to advocate responsible government and an end to the...

Vladimir II

(Encyclopedia)Vladimir II (Vladimir Monomakh) or Volodymyr II, 1053–1125, grand duke of Kiev (1113–25); son of Vsevolod I, prince of Pereyaslavl and grand duke of Kiev (ruled 1078–93). On his father's death h...

celestial sphere

(Encyclopedia)celestial sphere, imaginary sphere of infinite radius with the earth at its center. It is used for describing the positions and motions of stars and other objects. For these purposes, any astronomical...