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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 vertically a force mu...croaker
(Encyclopedia)croaker, member of the abundant and varied family Sciaenidae, carnivorous, spiny-finned fishes including the weakfishes, the drums, and the kingcroakers (or kingfish). The croaker has a compressed, el...Mayweather, Floyd, Jr.
(Encyclopedia)Mayweather, Floyd, Jr., 1977–, American boxer, b. Grand Rapids, Mich., as Floyd Joy Sinclair. He began boxing at an early age, coached by his father, a welterweight boxer whose name he subsequently ...hydrocarbon
(Encyclopedia)hydrocarbon hīˌdrōkärˈbən [key], any organic compound composed solely of the elements hydrogen and carbon. The hydrocarbons differ both in the total number of carbon and hydrogen atoms in their ...pound
(Encyclopedia)pound, abbr. lb, unit of either mass or force in the customary system of English units of measurement. Two different pounds of mass are defined, one in the avoirdupois system of units and one in the T...pH
(Encyclopedia)pH, range of numbers expressing the relative acidity or alkalinity of a solution. In general, pH values range from 0 to 14. The pH of a neutral solution, i.e., one which is neither acidic nor alkaline...eating disorders
(Encyclopedia)eating disorders, in psychology, disorders in eating patterns that comprise four categories: anorexia nervosa, bulimia, rumination disorder, and pica. Anorexia nervosa is characterized by self-starvat...gram-molecular volume
(Encyclopedia)gram-molecular volume, the volume occupied by one gram-molecular weight of any substance at STP. See molar volume. ...Gerhardt, Charles Frédéric
(Encyclopedia)Gerhardt, Charles Frédéric shärl frādārēkˈ zhārärˈ [key], 1816–56, French chemist, b. Strasbourg. He revived the theory of acid radicals, which he called the theory of residues, and did va...friction
(Encyclopedia)friction, resistance offered to the movement of one body past another body with which it is in contact. In certain situations friction is desired. Without friction the wheels of a locomotive could not...Browse by Subject
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