(Encyclopedia) Bergson, HenriBergson, HenriäNrēˈ bĕrgsôNˈ [key], 1859–1941, French philosopher. He became a professor at the Collège de France in 1900, devoted some time to politics, and, after World…
(Encyclopedia) ballisticsballisticsbəlĭsˈtĭks [key], science of projectiles. Interior ballistics deals with the propulsion and the motion of a projectile within a gun or firing device. Its problems…
(Encyclopedia) rationalism [Lat.,=belonging to reason], in philosophy, a theory that holds that reason alone, unaided by experience, can arrive at basic truth regarding the world. Associated with…
(Encyclopedia) steering system, in automobiles, steering wheel, gears, linkages, and other components used to control the direction of a vehicle's motion. Because of friction between the front tires…
(Encyclopedia) Riefenstahl, Leni (Berta Helene Amalie Riefenstahl)Riefenstahl, Lenilāˈnē rēˈfənshtälˌ, bĕrˈtə hālāˈnə ämälˈyə [key], 1902–2003, German filmmaker, b. Berlin. First a dancer, then an…
(Encyclopedia)
CE5
The Hertzsprung-Russell diagram shows the relation between the luminosity and surface temperature (which is related to spectral class, or color) of the stars in the Milky Way.…
(Encyclopedia) food preservation, methods of preparing food so that it can be stored for future use. Because most foods remain edible for only a brief period of time, people since the earliest ages…
(Encyclopedia) molecular weight, weight of a molecule of a substance expressed in atomic mass units (amu). The molecular weight may be calculated from the molecular formula of the substance; it is…
(Encyclopedia) photometryphotometryfōtŏmˈətrē [key], branch of physics dealing with the measurement of the intensity of a source of light, such as an electric lamp, and with the intensity of light…
(Encyclopedia) cabinet, group of advisers to the head of the state who themselves are usually the heads of the administrative government departments. The nature of the cabinet differs widely in…
