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proportion
(Encyclopedia) proportion, in mathematics, the equality of two ratios. Two pairs of quantities a,b and c,d are in proportion if their ratios a/b and c/d are equal, i.e., if the equation a/b=c/d is…Gay-Lussac, Joseph Louis
(Encyclopedia) Gay-Lussac, Joseph LouisGay-Lussac, Joseph Louiszhôzĕfˈ lwē gā-lüsäkˈ [key], 1778–1850, French chemist and physicist. He was professor in Paris at the Sorbonne, at the Polytechnic…kerosene
(Encyclopedia) kerosene or kerosine, colorless, thin mineral oil whose density is between 0.75 and 0.85 grams per cubic centimeter. A mixture of hydrocarbons, it is commonly obtained in the…Clark, Colin
(Encyclopedia) Clark, Colin, 1905–89, British economist. A statistics professor at Cambridge (1931–37), he taught in Australia and Great Britain until 1952, serving as economic adviser to the…Dudamel, Gustavo
(Encyclopedia) Dudamel, Gustavo, 1981–, Venezuelan conductor and violinist. A product of Venezuela's national music-training program, he quickly developed a brilliant, exuberant, and passionate…San Juan, city, Argentina
(Encyclopedia) San JuanSan Juansăn wän, Span. sän hwän [key], city (1991 pop. 353,476), capital of San Juan prov., W Argentina. It is a commercial and industrial center in an agricultural region.…metabolite
(Encyclopedia) metabolite, organic compound that is a starting material in, an intermediate in, or an end product of metabolism. Starting materials are substances, usually small and of simple…morocco, type of leather
(Encyclopedia) morocco, goatskin leather, dyed on the grain side and boarded by hand or machine to bring up the grain in a bird's-eye effect. It probably originated with the Arabs in North Africa as…magnesia, chemical compound
(Encyclopedia) magnesia, common name for the chemical compound magnesium oxide, MgO. It occurs as colorless, cubic crystals. It is refractory, melting at about 2,800℃. It is very slightly soluble in…prune
(Encyclopedia) prune, popular name for a dried plum. Fruits of the many varieties of Prunus domestica, which are firm-fleshed and dry easily without removal of the stone, are gathered after falling…Trending
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