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Mach, Ernst
(Encyclopedia)Mach, Ernst ĕrnst mäkh [key], 1838–1916, Austrian physicist and philosopher, b. Moravia. He taught (1864–67) mathematics at Graz and later, until his retirement in 1901, was professor of physics...Feuerbach, Ludwig Andreas
(Encyclopedia)Feuerbach, Ludwig Andreas foiˈərbäkh [key], 1804–72, German philosopher, educated at Heidelberg and Berlin; son of Paul Johann Anselm von Feuerbach. At first a Hegelian, he abandoned absolute id...Fortescue, Sir John
(Encyclopedia)Fortescue, Sir John fôrˈtĭskyo͞o [key], c.1394–1476, English jurist. A supporter of the Lancastrian king Henry VI, he was chief justice of the Court of King's Bench from 1442 until 1461, when He...substance
(Encyclopedia)substance, in philosophy, term used to denote the changeless substratum presumed in some philosophies to be present in all being. Aristotle defined substance as that which possesses attributes but is ...calculus
(Encyclopedia) CE5 The derivative f″(x) of the function f(x) at the point P represents the slope of the tangent line at that point. CE5 The area under the curve y=f(x) may be found by calculating the sum of ...geochemistry
(Encyclopedia)geochemistry, study of the chemical changes on the earth. More specifically, it is the study of the absolute and relative abundances of chemical elements in the minerals, soils, ores, rocks, water, an...geologic timescale
(Encyclopedia) CE5 geologic timescale, a chronological scale of earth's history used to measure the relative or absolute age of any part of geologic time. Of the numerous timescales, the most common is based on g...Frederick III, king of Denmark and Norway
(Encyclopedia)Frederick III, 1609–70, king of Denmark and Norway (1648–70), son and successor of Christian IV. He at first made great concessions to the powerful nobles but later asserted his own power. In 1657...atomic mass
(Encyclopedia)atomic mass, the mass of a single atom, usually expressed in atomic mass units (amu). Most of the mass of an atom is concentrated in the protons and neutrons contained in the nucleus. Each proton or n...tensor
(Encyclopedia)tensor, in mathematics, quantity that depends linearly on several vector variables and that varies covariantly with respect to some variables and contravariantly with respect to others when the coordi...Browse by Subject
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