(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…
(Encyclopedia) Eden, name of several rivers in England and Scotland. The principal one rises in Cumbria, N England, and flows 65 mi (105 km) NW past Carlisle, into Solway Firth. The Vale of Eden is a…
