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hummingbird
(Encyclopedia) hummingbird, common name for members of the family Trochilidae, small, strictly New World birds, related to the swifts, and found chiefly in the mountains of South America.…inclined plane
(Encyclopedia) CE5 Inclined plane inclined plane, simple machine, consisting of a sloping surface, whose purpose is to reduce the force that must be applied to raise a load. To raise a body…Mach's principle
(Encyclopedia) Mach's principleMach's principlemäks [key] [for E. Mach], assertion that the inertial effects of mass are not innate in a body, but arise from its relation to the totality of all other…Atacama Desert
(Encyclopedia) Atacama DesertAtacama Desertätäkäˈmä [key], arid region, c.600 mi (970 km) long, N Chile, extending south from the border of Peru. The desert itself, c.2,000 ft (610 m) above sea level…chain
(Encyclopedia) chain, flexible series of connected links used in various ways, especially for the transmission of motive power, for hoisting (see pulley), and for securing or fastening. Commonly,…dream
(Encyclopedia) dream, mental activity associated with the rapid-eye-movement (REM) period of sleep. It is commonly made up of a number of visual images, scenes or thoughts expressed in terms of…Dyson, Freeman John
(Encyclopedia) Dyson, Freeman JohnDyson, Freeman Johndīˈsən [key], 1923–2020, British-American theoretical physicist and mathematician, studied Trinity College, Cambridge (B.A., 1945) and Cornell. He…kinetic-molecular theory of gases
(Encyclopedia) kinetic-molecular theory of gases, physical theory that explains the behavior of gases on the basis of the following assumptions: (1) Any gas is composed of a very large number of very…Koizumi, Junichiro
(Encyclopedia) Koizumi, JunichiroKoizumi, Junichiroj&oobreve;nēˈchērō kōēˈz&oomacr;mē [key], 1942–, Japanese political leader, b. Yokosuka. From a political family, he studied economics at…Five-Year Plan
(Encyclopedia) Five-Year Plan, Soviet economic practice of planning to augment agricultural and industrial output by designated quotas for a limited period of usually five years. Nations other than…Trending
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