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barometer
(Encyclopedia)CE5 Aneroid barometer barometer bərŏmˈətər [key], instrument for measuring atmospheric pressure. It was invented in 1643 by the Italian scientist Evangelista Torricelli, who used a column...cesium
(Encyclopedia)cesium sēˈzēəm [key] [Lat.,=bluish gray], a metallic chemical element; symbol Cs; at. no. 55; at. wt. 132.90545; m.p. 28.4℃; b.p. 669.3℃; sp. gr. 1.873 at 20℃; valence +1. Cesium is a ductil...Canton, cities, United States
(Encyclopedia)Canton. 1 City (2020 pop. 13,098), Fulton co., W central Ill., in the corn belt; inc. 1849. It is a trade and industrial center for a coal and ...vapor pressure
(Encyclopedia)vapor pressure, pressure exerted by a vapor that is in equilibrium with its liquid. A liquid standing in a sealed beaker is actually a dynamic system: some molecules of the liquid are evaporating to f...Dubochet, Jacques
(Encyclopedia)Dubochet, Jacques, 1942–, Swiss biophysicist and molecular biologist, Ph.D., Univ. of Geneva 1973. Dubochet was a researcher at the European Molecular Biology Laboratory in Heidelberg from 1978 to 1...Niyazov, Saparmurat
(Encyclopedia)Niyazov, Saparmurat säpärˈmo͞orätˌ nēyäˈzôf [key], 1940–2006, Soviet and Turkmen political leader, president of Turkmenistan (1991–2006). An engineer and member of the Communist party, h...mass spectrograph
(Encyclopedia)mass spectrograph, device used to separate electrically charged particles according to their masses; a form of the instrument known as a mass spectrometer is often used to measure the masses of isotop...weightlessness
(Encyclopedia)weightlessness, the absence of any observable effects of gravitation. This condition is experienced by an observer when he and his immediate surroundings are allowed to move freely in the local gravit...air lock
(Encyclopedia)air lock, compartment connecting two different environments, usually at different pressures, that enables personnel to transfer from one environment to the other. Space capsules have air locks to enab...magnetron
(Encyclopedia)magnetron măgˈnĭtrŏnˌ [key], vacuum tube oscillator (see electron tube) that generates high-power electromagnetic signals in the microwave frequency range. Its operation is based on the combined ...Browse by Subject
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