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Dover, cities, United States

(Encyclopedia)Dover. 1 City (2020 pop. 39,403), state capital, and seat of Kent co., central Del., on the St. Jones River; founded 1683 on orders of William ...

Tedder, Arthur William Tedder, 1st Baron

(Encyclopedia)Tedder, Arthur William Tedder, 1st Baron, 1890–1967, British air marshal. He saw service in the infantry and the Royal Flying Corps in World War I. After 1919 he held important positions in the Roya...

Mitchell, William

(Encyclopedia)Mitchell, William (Billy Mitchell), 1879–1936, American army officer and pilot, b. Nice, France. He enlisted (1898) in the U.S. army in the Spanish-American War and received a commission in the regu...

Keflavík

(Encyclopedia)Keflavík kĕpˈlävēkˌ [key], town (1993 pop. 7,584), SW Iceland, on the Faxaflói, W of Reykjavík. It is a major fishing port, best known for its large international airport, which was built by t...

sandblast

(Encyclopedia)sandblast, stream of sand or other abrasive particles driven by a jet of compressed air or water or by centrifugal force against a surface to clean or abrade it. When centrifugal force is used, the ab...

Ctesibius

(Encyclopedia)Ctesibius tĭsĭbˈēəs [key], fl. 2d cent. b.c., Alexandrian Greek inventor. He reputedly was the first to discover and apply the expansive power of air as a motive force. Among the inventions ascri...

Wichita, city, United States

(Encyclopedia)Wichita wĭchˈĭtô [key], city (1990 pop. 304,011), seat of Sedgwick co., S central Kans., at the confluence of the Arkansas and Little Arkansas rivers; inc. 1870. It is the chief commercial and ind...

pressure

(Encyclopedia)pressure, in mechanics, ratio of the force acting on a surface to the area of the surface; it is thus distinct from the total force acting on a surface. A force can be applied to and sustained by a si...

North Bay

(Encyclopedia)North Bay, city (1991 pop. 55,405), SE Ont., Canada, on Lake Nipissing. It is the transportation and commercial center of lumbering and mining districts and a popular summer resort. Mining equipment i...