(Encyclopedia) Lexington and Concord, battles of, opening engagements of the American Revolution, Apr. 19, 1775. After the passage (1774) of the Intolerable Acts by the British Parliament, unrest in…
(Encyclopedia) formula, in mathematics and physics, equation expressing a definite fixed relationship between certain quantities. The quantities are usually expressed by letters, and their…
(Encyclopedia) ether or aether, in physics and astronomy, a hypothetical medium for transmitting light and heat (radiation), filling all unoccupied space; it is also called luminiferous ether. In…
(Encyclopedia) Ishim, river, c.1,130 mi (1,819 km) long, W Siberian Russia and Kazakhstan. It rises N of Qaraghandy in Kazakhstan (where it is known as the Esil), flows W past Atbasar, N past…
(Encyclopedia) CardamomsCardamomskärˈdəməmz [key], Thai Banthat, Khmer Kravanh, mountain group extending c.100 mi (160 km) along the Thai-Cambodian border, E of Chanthaburi, SE Thailand. The…
(Encyclopedia) Oise, river, 186 mi (299 km) long, rising in the Ardennes Mts., S Belgium, and flowing through N France generally SW past Compiègne to join the Seine River near Pontoise. Navigable for…
