Columbia Encyclopedia

Search results

90 results found

Langmuir, Irving

(Encyclopedia)Langmuir, Irving lăngˈmyo͞or [key], 1881–1957, American chemist, b. Brooklyn, N.Y. Associated (1909–50) with the research laboratory of the General Electric Company, he introduced atomic-hydrog...

Goddard, Robert Hutchings

(Encyclopedia)Goddard, Robert Hutchings, 1882–1945, American physicist and rocket expert, b. Worcester, Mass., grad. Worcester Polytechnic Institute (B.S., 1908), Ph.D. Clark Univ., 1911. From 1914 he was associa...

streamline

(Encyclopedia)streamline, path of a fluid flowing steadily and without appreciable turbulence. A body is said to be streamlined if its shape offers the least possible resistance to a current of air, water, or other...

brake, in technology

(Encyclopedia)CE5 Shoe brake CE5 Disk brake brake, in technology, device to slow or stop the motion of a mechanism or vehicle. The vacuum brake system, or vacuum brake, depends upon the use of a vacuum to ...

meter, unit of measure

(Encyclopedia)meter, abbr. m, fundamental unit of length in the metric system. The meter was originally defined as 1/10,000,000 of the distance between the equator and either pole; however, the original survey was ...

Guericke, Otto von

(Encyclopedia)Guericke, Otto von ôˈtō fən gāˈrĭkə [key], 1602–86, German physicist, noted for his study of pneumatics. He carried out his most important researches while burgomaster (1646–81) of Magdebu...

Lenard, Philipp Eduard Anton

(Encyclopedia)Lenard, Philipp Eduard Anton fēˈlĭp āˈdo͞oärt änˈtōn lāˈnärt [key], 1862–1947, German physicist, b. Bratislava. After serving as professor at the universities of Kiel (1898–1907) and ...

Brattain, Walter Houser

(Encyclopedia)Brattain, Walter Houser, 1902–87, American physicist, b. Xiamen, China, Ph.D. Univ. of Minnesota, 1929. He was a researcher at Bell Laboratories in Murray Hill, N.J. from 1929 to 1967. He then taugh...

Brighton and Hove

(Encyclopedia)Brighton and Hove, city and unitary authority and district, SE England. It was formed by the merger of the boroughs of Brighton and Hove in 1997, and be...

insulation

(Encyclopedia)insulation ĭnˌsəlāˈshən, ĭnˌsyo͝o– [key], use of materials or devices to inhibit or prevent the conduction of heat or of electricity. Common heat insulators are, fur, feathers, fiberglass, ...

Browse by Subject