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marine engine

(Encyclopedia)marine engine, machine for the propulsion of watercraft. The earliest marine power plants, reciprocating steam engines, were used almost exclusively until the early 1900s. In later ship construction t...

Tymoshenko, Yulia Volodymyrivna

(Encyclopedia)Tymoshenko, Yulia Volodymyrivna, 1960–, Ukrainian political leader, prime minister of Ukraine (2005, 2007–10), b. Dnipro (Dnipropetrovsk). She studied economics and cybernetics at Dnipropetrovsk S...

thermodynamics

(Encyclopedia)thermodynamics, branch of science concerned with the nature of heat and its conversion to mechanical, electric, and chemical energy. Historically, it grew out of efforts to construct more efficient he...

galaxy

(Encyclopedia)CE5 Hubble classification of galaxies: Elliptical galaxies (E) are classified according to the degree of flattening of the ellipse. Spiral galaxies (S) and barred spiral galaxies (SB) are classifie...

sulfuric acid

(Encyclopedia)sulfuric acid, chemical compound, H2SO4, colorless, odorless, extremely corrosive, oily liquid. It is sometimes called oil of vitriol. Although sulfuric acid is now one of the most widely used c...

Merapi, Mount

(Encyclopedia)Merapi, Mount məräˈpē [key] [Indonesian=mountain of fire], volcano, 9,551 ft (2,911 m) high, central Java, Indonesia, 20 mi (32 km) NNE of Yogyakarta. It is the most active of Indonesia's many vol...

San Angelo

(Encyclopedia)San Angelo săn ănˈjəlō [key], city (1990 pop. 84,474), seat of Tom Green co., W Tex., where two forks join to form the Concho River; laid out 1869, inc. 1903. It is an important wool and mohair m...

Santa Cruz de la Sierra

(Encyclopedia)Santa Cruz de la Sierra ᵺā lä sēĕrˈä [key], city (1992 pop. 697,278), capital of Santa Cruz dept., central Bolivia, on the Piray River. A trade and processing center for sugar, rice, cotton, f...

Tobolsk

(Encyclopedia)Tobolsk təbôlskˈ [key], city (1989 pop. 94,000), W Siberian Russia, a port on the Irtysh River near its confluence with the Tobol. Industries revolve around oil and gas from the W Siberian oil fiel...

Scarborough Shoal

(Encyclopedia)Scarborough Shoal, lagoon and reefs, South China Sea, c.135 mi (220 km) W of Luzon, the Philippines. Claimed by China, the Philippines, and Taiwan, it is called Huangyan Island by China and Panatag Sh...