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acids and bases
(Encyclopedia)acids and bases, two related classes of chemicals; the members of each class have a number of common properties when dissolved in a solvent, usually water. Another theory that provides a very broad ...Pinochet Ugarte, Augusto
(Encyclopedia)Pinochet Ugarte, Augusto ougo͞osˈtō pēnōchāˈ o͞ogärˈtā [key], 1915–2006, president and dictator of Chile (1973–90). An army general who served as chief of staff (1972–73) and commande...Morsi, Mohamed
(Encyclopedia)Morsi, Mohamed môrˈsē [key], 1951–2019, Egyptian engineer and political leader, grad. Cairo Univ. (B.A. 1975. M.A. 1978), Univ. of Southern California (Ph.D. 1982). He taught engineering at Calif...Ketterle, Wolfgang
(Encyclopedia)Ketterle, Wolfgang, 1957–, German physicist, Ph.D. Max Planck Institute for Quantum Optics, Garching, Germany, 1986. He has been a professor at Massachusetts Institute of Technology since 1990. Kett...solvent
(Encyclopedia)solvent, constituent of a solution that acts as a dissolving agent. In solutions of solids or gases in a liquid, the liquid is the solvent. In all other solutions (i.e., liquids in liquids or solids i...Mitchell, John Newton
(Encyclopedia)Mitchell, John Newton, 1913–88, U.S. Attorney General (1969–72), b. Detroit. A law partner of Richard M. Nixon, he managed Nixon's 1968 presidential campaign and was made (1969) Attorney General. ...celestial mechanics
(Encyclopedia)celestial mechanics, the study of the motions of astronomical bodies as they move under the influence of their mutual gravitation. Celestial mechanics analyzes the orbital motions of planets, dwarf pl...stellar structure
(Encyclopedia)stellar structure, physical properties of a star and the processes taking place within it. Except for that of the sun, astronomers must draw their conclusions regarding stellar structure on the basis ...Rjukan
(Encyclopedia)Rjukan rēo͞oˈkän [key], town, Telemark co., S Norway, on the Rjukanfoss, one of several high waterfalls of the Måne River. Its large power stations supply electricity to saltpeter and chemical fe...Reventazón
(Encyclopedia)Reventazón rāvāntäsōnˈ [key], river, c.85 mi (140 km) long, rising in the Meseta Central, E Costa Rica, and flowing NE to the Caribbean Sea, N of Limón. The Reventazón is navigable for a short...Browse by Subject
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