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free energy

(Encyclopedia)free energy or Gibbs free energy, quantity derived from the relationships between heat and work studied in thermodynamics and used as a measure of the relative stability of a physical or chemical syst...

Hitchcock, Frank Harris

(Encyclopedia)Hitchcock, Frank Harris, 1867–1935, U.S. Postmaster General (1909–13), b. Amherst, Ohio. After service in the Dept. of Agriculture (1897–1903), the Dept. of Commerce and Labor (1903–5), and as...

telescope

(Encyclopedia)CE5 Mirror arrangements for a reflecting telescope telescope, traditionally, a system of lenses, mirrors, or both, used to gather light from a distant object and form an image of it. Traditional o...

Taylor, Joseph Hooton, Jr.

(Encyclopedia)Taylor, Joseph Hooton, Jr., 1941–, American astrophysicist, b. Philadelphia, Ph.D. Harvard, 1968. Taylor was a professor at the Univ. of Massachusetts at Amherst from 1969 to 1980, when he joined th...

hysteresis

(Encyclopedia)hysteresis hĭsˌtərēˈsĭs [key], phenomenon in which the response of a physical system to an external influence depends not only on the present magnitude of that influence but also on the previous...

Lithuania

(Encyclopedia)CE5 Lithuania lĭtho͞oāˈnēə [key], Lithuanian Lietuva, officially Republic of Lithuania, republic (2015 est. pop. 2,932,000), 25,174 sq mi (65,201 sq km), N central Europe. Lithuania borders o...

Monroe Doctrine

(Encyclopedia)Monroe Doctrine, principle of American foreign policy enunciated in President James Monroe's message to Congress, Dec. 2, 1823. It initially called for an end to European intervention in the Americas,...

Commonwealth of Nations

(Encyclopedia)Commonwealth of Nations, voluntary association of Great Britain and its dependencies, certain former British dependencies that are now sovereign states and their dependencies, and the associated state...

Chirac, Jacques René

(Encyclopedia)Chirac, Jacques René zhäk rənāˈ shēräkˈ [key], 1932–2019, French political leader, president of France (1995–2007), b. Paris. He attended the National School of Administration, joined the ...

Normans

(Encyclopedia)Normans, designation for the Northmen, or Norsemen, who conquered Normandy in the 10th cent. and adopted Christianity and the customs and language of France. Abandoning piracy and raiding, they adopte...