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motor, electric

(Encyclopedia)CE5 Motor: In the AC motor, current fed to the conducting loop of wire causes it to rotate in the magnetic field, thus turning the shaft on which the loop is mounted. In the DC motor, the direction...

Honolulu

(Encyclopedia)Honolulu hŏnˌəlo͞oˈlo͞o, hōnō– [key], city (2020 pop. 350,964), capital of ...

Dubai

(Encyclopedia)Dubai do͞obīˈ [key], sheikhdom (2021 pop. 2,921,376), c.1,500 sq mi (3,890 sq km), part of...

Cunningham, Merce

(Encyclopedia)Cunningham, Merce (Mercier Philip Cunningham), 1919–2009, American modern dancer and choreographer, b. Centralia, Wash. Cunningham studied modern dance with Martha Graham and ballet at Balanchine's ...

Rochester, cities, United States

(Encyclopedia)Rochester rŏchˈĕstər, –ĭstər [key]. 1 City (1990 pop. 70,745), seat of Olmsted co., SE Minn.; inc. 1858. It is a farm trade center, and its industries include printing and publishing, food pro...

semiconductor

(Encyclopedia)CE5 N-type and P-type crystals: In a pure silicon crystal each silicon atom (Si) is surrounded by four valence electrons. In the N-doped semiconductor, illustrated in the left-hand figure, some sil...

Thaksin Shinawatra

(Encyclopedia)Thaksin Shinawatra täkˈsĭn shĭˈnäwät [key], 1949–, Thai business executive and political leader, b. Chiang Mai. Born into a wealthy merchant family, he went into the Thai police service in 19...

Wilmington

(Encyclopedia)Wilmington. 1 City (1990 pop. 71,529), seat of New Castle co., NE Del., on the Delaware River and tributary streams, the Christina and the Brandywine; settled 1638, inc. as a city 1832. The state's la...

chess

(Encyclopedia)chess, game for two players played on a square board composed of 64 square spaces, alternately dark and light in color. London was the site of the first modern international chess tournament in 1851...

radio astronomy

(Encyclopedia)radio astronomy, study of celestial bodies by means of the electromagnetic radio frequency waves they emit and absorb naturally. Radio waves also come from outside the Milky Way. These extragalact...