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Some Outstanding Temperature Rises
In 12 hours: 83°F, Granville, N.D., Feb. 21, 1918, from –33°F to 50°F from early morning to late afternoon. In 15 minutes: 42°F, Fort Assiniboine, Mont., Jan. 19, 1892, from –5°F to 37°F. In…Some Outstanding Temperature Falls
In 24 hours: 100°F, Browing, Mont., Jan. 23–24, 1916, from 44°F to –56°F. In 12 hours: 84°F, Fairfield, Mont., Dec. 24, 1924, from 63°F at noon to –21°F at midnight. In 2 hours: 62°F, Rapid…British thermal unit
(Encyclopedia) British thermal unit, abbr. Btu, unit for measuring heat quantity in the customary system of English units of measurement, equal to the amount of heat required to raise the temperature…blackbody
(Encyclopedia) blackbody, in physics, an ideal black substance that absorbs all and reflects none of the radiant energy falling on it. Lampblack, or powdered carbon, which reflects less than 2% of…kelvin
(Encyclopedia) kelvin, abbr. K, official name in the International System of Units (SI) for the degree of temperature as measured on the Kelvin temperature scale.Guinea Department of State Background
U.S. Department of State Background Note Guinea Index: Geography People History Government and Political Conditions Economy Defense Foreign Relations U.S.-Guinean Relations GEOGRAPHYGuinea is…Solomon Islands Department of State Background
U.S. Department of State Background Note Solomon Islands Index: Geography People History Government Political Conditions Economy Foreign Relations U.S.-Solomon Islands Relations GEOGRAPHYThe…state
(Encyclopedia) state: see government.Le Châtelier's principle
(Encyclopedia) Le Châtelier's principle, chemical principle that states that if a system in equilibrium is disturbed by changes in determining factors, such as temperature, pressure, and…hardening
(Encyclopedia) hardening, in metallurgy, treatment of metals to increase their resistance to penetration. A metal is harder when it has small grains, which result when the metal is cooled rapidly.…Trending
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