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student movements

(Encyclopedia)student movements, designation given to the ideas and activities of student groups involved in social protest. Historically, student movements have been in existence almost as long as universities the...

Tamil Nadu

(Encyclopedia)Tamil Nadu mədrăsˈ, mədräsˈ [key], state (2001 provisional pop. 62,110,839), 50,180 sq mi (129,966 sq km), SE India, on the Bay of Bengal. The capital is Chennai (formerly Madras). On a low-lyin...

Air Force, United States Department of the

(Encyclopedia)Air Force, United States Department of the, military department within the U.S. Dept. of Defense (see Defense, United States Department of). The Air Force traces its roots to the founding of the Aeron...

carbon

(Encyclopedia)CE5 The three solid forms of pure carbon: In the diamond crystal each carbon atom is surrounded symmetrically by four other carbons (at each of the four corners of a tetrahedron). In the graphite c...

air forces

(Encyclopedia)air forces, those portions of a nation's military organization employing heavier-than-air aircraft for reconnaissance, support of ground troops, aerial combat, and bombing of enemy lines of communicat...

Sumatra

(Encyclopedia)Sumatra so͝omäˈtrə [key], island (1990 pop. 36,471,731), c.183,000 sq mi (473,970 sq km), Indonesia, in the Indian Ocean along the equator, S and W of the Malay Peninsula (from which it is separat...

atom

(Encyclopedia)CE5 Bohr-Rutherford atom CE5 Probability distribution of the electron in the hydrogen atom: A. Ground state B. Highly excited state atom [Gr.,=uncuttable (indivisible)], basic unit of matte...

Union of Soviet Socialist Republics

(Encyclopedia)Union of Soviet Socialist Republics (USSR), Rus. Soyuz Sovetskikh Sotsialisticheskikh Respublik, former republic. It was established in 1922 and dissolved in 1991. The Soviet Union was the first state...

occupational disease

(Encyclopedia)occupational disease, illness incurred because of the conditions or environment of employment. Unlike with accidents, some time usually elapses between exposure to the cause and development of symptom...

Mumbai

(Encyclopedia)Mumbai bŏmbāˈ [key], city (1991 pop. 3,175,000), capital of Maharashtra state, W central India, occupying c.25 sq mi (65 sq km) on Mumbai (Bombay) and Salsette islands on the Arabian Sea coast. Mum...