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Fort Worth

(Encyclopedia)Fort Worth, city (2020 pop. 918,915), seat of Tarrant co., N Tex., on the Trinity River 30 mi (48 km) W of Dallas; settled 1843, inc. 1873. An army post...

Iacocca, Lee

(Encyclopedia)Iacocca, Lee (Lido Anthony Iacocca) īˌəkōˈkə [key], 1924–2019, American automobile business executive, b. Allentown, Pa., grad. Lehigh Univ. (1945), Princeton (M.A., 1946). That year he joined...

Hanover, city, Germany

(Encyclopedia)Hanover, Ger. Hannover, city, capital of Lower Saxony, N Germany, on the Leine River and the Midland Canal. It is a major industrial, commercial, ...

sleep apnea

(Encyclopedia)sleep apnea, episodes of interrupted breathing during sleep. Obstructive sleep apnea is a common disorder in which relaxation of muscles in the throat repeatedly close off the airway during sleep; the...

rectifier

(Encyclopedia)rectifier, component of an electric circuit used to change alternating current to direct current. Rectifiers are made in various forms, all operating on the principle that current passes through them ...

Schenectady

(Encyclopedia)Schenectady skənĕkˈtədē [key], city (1990 pop. 65,566), seat of Schenectady co., E central N.Y., on the Mohawk River and Erie Canal; founded 1661 by Arent Van Curler, inc. 1798. The General Elect...

Changsha

(Encyclopedia)Changsha chängˈshäˈ [key], city (1994 est. pop. 1,198,100), capital of Hunan prov., S China, on the Xiang River. The name, which means “long sandbank,” is derived from an island in the river. ...

dimension, in physics

(Encyclopedia)dimension, in physics, an expression of the character of a derived quantity in relation to fundamental quantities, without regard for its numerical value. In any system of measurement, such as the met...

Great Falls

(Encyclopedia)Great Falls, city (2020 pop. 60,442), seat of Cascade co., N central Mont., second largest city in the state, at the confluence of the Missouri and Sun ...

flux, magnetic

(Encyclopedia)flux, magnetic, in physics, term used to describe the total amount of magnetic field in a given region. The term flux was chosen because the power of a magnet seems to “flow” out of the magnet at ...