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viscosity
(Encyclopedia)viscosity, resistance of a fluid to flow. This resistance acts against the motion of any solid object through the fluid and also against motion of the fluid itself past stationary obstacles. Viscosity...laser
(Encyclopedia)CE5 Ordinary light sources produce incoherent light, while a laser produces a beam of coherent light. laser [acronym for light amplification by stimulated emission of radiation], device for the cr...colloid
(Encyclopedia)colloid kŏlˈoid [key] [Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The mixture is also...Ukraine
(Encyclopedia)CE5 Ukraine yo͞oˈkrān, yo͞okrānˈ [key], Ukr. Ukraina, republic (2015 est. pop. 44,658,000), 232,046 sq mi (601,000 sq km), E Europe. It borders on Poland in the northwest; on Slovakia, Hungar...San Andrés and Providencia
(Encyclopedia)San Andrés and Providencia, district (1990 est. pop. 39,949), 21 sq mi (54 sq km), Colombia, comprising two small islands and seven groups of coral reefs and cays in the Caribbean 125–200 mi (201�...Peace
(Encyclopedia)Peace, river, 945 mi (1,521 km) long, formed by the junction of the Finlay and Parsnip rivers at Williston Lake, N central British Columbia, Canada. It flows east through the Rocky Mts., then generall...corona, in astronomy
(Encyclopedia)corona, luminous envelope surrounding the sun, outside the chromosphere. Its density is less than one billionth that of the earth's atmosphere. The corona is visible only at the time of totality durin...Colchester
(Encyclopedia)Colchester kōlˈchĭstər, –chĕsˌtər [key], city and district, Essex, SE Englan...Fort Worth
(Encyclopedia)Fort Worth, city (2020 pop. 918,915), seat of Tarrant co., N Tex., on the Trinity River 30 mi (48 km) W of Dallas; settled 1843, inc. 1873. An army post...Fresno
(Encyclopedia)Fresno frĕzˈnō [key], city (2020 pop. 546,770), seat of Fresno co., S central Calif.; inc....Browse by Subject
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