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Trenton , town, Canada
(Encyclopedia)Trenton, town (1991 pop. 16,908), SE Ont., Canada, on the Bay of Quinte at the mouth of the Trent River and at the south end of the Trent Canal. Its manufactures include textiles, electronic component...acid rain
(Encyclopedia)acid rain or acid deposition, form of precipitation (rain, snow, sleet, or hail) containing high levels of sulfuric or nitric acids (pH below 5.5–5.6). Produced when sulfur dioxide and various nitro...Charleston, cities, United States
(Encyclopedia)Charleston. 1 City (2020 pop. 17,286), seat of Coles co., E Ill.; inc. 1835. Charleston is an industrial, rail, and trade center located in an ...Doolittle, James Harold
(Encyclopedia)Doolittle, James Harold, 1896–1993, American aviator, b. Alameda, Calif. After serving in World War I as a flier he returned to school and earned a Sc.D. from MIT. He then became noted for his speed...Sylvester, James Joseph
(Encyclopedia)Sylvester, James Joseph, 1814–97, English mathematician. He studied at Cambridge for four years after 1831, but because degrees were limited to members of the Church of England and he was a Jew, he ...Capra, Frank
(Encyclopedia)Capra, Frank kăpˈrə [key], 1897–1991, American film director, b. Bisaquino, Sicily. One of the preeminent Hollywood directors of the 1930s and 40s, he produced idealistic populist movies that, so...reed organ
(Encyclopedia)reed organ, an organ in which air is forced over free reeds by means of bellows, usually worked by pedals. It is played by the use of one or more keyboards. Variations in tone are produced by stops th...Saint Petersburg, city, United States
(Encyclopedia)Saint Petersburg, city (1990 pop. 238,629), Pinellas co., W Fla., on Tampa Bay and the Gulf of Mexico at the southern end of the Pinellas peninsula; settled in the mid-1800s, inc. 1892. A port with a ...engineering
(Encyclopedia)engineering, profession devoted to designing, constructing, and operating the structures, machines, and other devices of industry and everyday life. Until the Industrial Revolution there were only t...force
(Encyclopedia)force, commonly, a “push” or “pull,” more properly defined in physics as a quantity that changes the motion, size, or shape of a body. Force is a vector quantity, having both magnitude and dir...Browse by Subject
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