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Semyonov, Nikolay Nikolayevich

(Encyclopedia)Semyonov, Nikolay Nikolayevich, or Nikolai Nikolaevic Semenov, 1896–1986, Soviet physical chemist, Ph.D. Petrograd Univ., 1917. Semyonov was a professor at the Leningrad Physico-Technical Institute ...

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...

corvette

(Encyclopedia)corvette, small warship, classed between a frigate and a sloop-of-war. Corvettes usually were flush-decked and carried fewer than 28 guns. They were widely employed in escorting convoys and attacking ...

Merthyr Tydfil

(Encyclopedia)Merthyr Tydfil mûrˈthər tĭdˈvĭl [key], town (1981 pop. 38,893) and county borough, 43 sq mi (111 sq km), S Wales. Located on the Taff River, the town is connected to Cardiff by canal. It has iro...

Regnault, Henri Victor

(Encyclopedia)Regnault, Henri Victor äNrēˈ vēktôrˈ rənyōˈ [key], 1810–78, French physicist and chemist. He was professor of chemistry at the École polytechnique, Paris, from 1840 and at the Collège de ...

Bayer process

(Encyclopedia)Bayer process, procedure for obtaining alumina from the aluminum ore bauxite. The alumina can then be used for various industrial purposes or smelted to provide aluminum. The first step in the process...

producer gas

(Encyclopedia)producer gas, fuel gas consisting chiefly of carbon monoxide and nitrogen. It is prepared in a furnace or generator in which air is forced upward through a burning fuel of coal or coke. Although the f...

tachometer

(Encyclopedia)tachometer tăkŏmˈətər [key], instrument that indicates the speed, usually in revolutions per minute, at which an engine shaft is rotating. Some tachometers, especially those used in automobiles, ...

Barrow-in-Furness

(Encyclopedia)Barrow-in-Furness –fûrˈnĭs [key], city and district, Cumbria, NW England, on the tip of the Furness peninsula. T...

carburetor

(Encyclopedia)carburetor kärˈbyərāˈtər, –bə– [key], part of a gasoline engine in which liquid fuel is converted into a vapor and mixed with a regulated amount of air for combustion in the cylinders. Land...