WHAT IS A HEAT ENGINE? WHAT IS AN INTERNAL COMBUSTION ENGINE? HOW DOES A STEAM ENGINE WORK? HOW DOES A JET ENGINE WORK? GASOLINE ENGINEBIOGRAPHY: FRANK WHITTLE English, 1907-1996 TURBINESFUEL…
(Encyclopedia) Doe, Samuel Kanyon, 1951–90, Liberian military ruler (1980–90). Doe joined the army after the 11th grade, and rose to master sergeant. In 1980 Doe led a group of rebels in a successful…
(Encyclopedia) Harrington, James, 1611–77, English political writer. His Commonwealth of Oceana (1656) pictured a utopian society in which political authority rested entirely with the landed gentry.…
(Encyclopedia) Bohun, Humphrey VIII de, 4th earl of Hereford and 3d earl of Essex, 1276–1322, English nobleman; son of Humphrey VII de Bohun. One of the lords ordainers who attempted to curb the…
(Encyclopedia) Leopold II, 1747–92, Holy Roman emperor (1790–92), king of Bohemia and Hungary (1790–92), as Leopold I grand duke of Tuscany (1765–90), third son of Maria Theresa. Succeeding his…
(Encyclopedia) belligerencybelligerencybəlĭjˈərənsē [key], in international law, status of parties legally at war. Belligerency exists in a war between nations or in a civil war if the established…
(Encyclopedia) Rumelia or RoumeliaRumeliaboth: r&oomacr;mēˈlēə [key], region of S Bulgaria, between the Balkan and Rhodope mts. Historically, Rumelia denoted the Balkan possessions (particularly…
(Encyclopedia) binary system, numeration system based on powers of 2, in contrast to the familiar decimal system, which is based on powers of 10. In the binary system, only the digits 0 and 1 are…
ELECTRIC TRAINSBIOGRAPHY: NIKOLA TESLA American, 1856-1943FIND OUT MOREElectric motors make things move. They convert electrical power into mechanical power using electromagnetic attraction and…
