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Units of Time: Measure Elapsed Time
In this video, Marta learns how to calculate elapsed time using the clock as a visual.Fates
(Encyclopedia) Fates, in Greek religion and mythology, three goddesses who controlled human lives; also called the Moerae or Moirai. They were: Clotho, who spun the web of life; Lachesis, who…right ascension
(Encyclopedia) right ascension, in astronomy, one of the coordinates in the equatorial coordinate system. The right ascension of a celestial body is the angular distance measured eastward from the…Sanctorius
(Encyclopedia) SanctoriusSanctoriussăngktôrˈēəs [key], Ital. Santorio, 1561–1636, Italian physiologist. He was a professor at Padua (1611–24). By his quantitative experiments in temperature,…intercolumniation
(Encyclopedia) intercolumniationintercolumniationĭnˌtərkəlŭmˌnēāˈshən [key], in classical architecture, the clear space between the edges of two adjacent columns, as measured at the lower portion of…Mach number
(Encyclopedia) Mach numberMach numbermäk [key] [for E. Mach], ratio between the speed of an object and the speed of sound in the medium in which the object is traveling. An airplane that has the…Michelson, Albert Abraham
(Encyclopedia) Michelson, Albert AbrahamMichelson, Albert Abrahammīˈkəlsən [key], 1852–1931, American physicist, b. Strelno, Prussia, grad. Annapolis, 1873, and studied at Berlin, Heidelberg, and…altitude
(Encyclopedia) altitude, vertical distance of an object above some datum plane, such as mean sea level or a reference point on the earth's surface. It is usually measured by the reduction in…wind tunnel
(Encyclopedia) wind tunnel, apparatus for studying the interaction between a solid body and an airstream. A wind tunnel simulates the conditions of an aircraft in flight by causing a high-speed…radar astronomy
(Encyclopedia) radar astronomy, application of radar to the determination of distances and planetary features within the solar system, such as rotation rates. A short burst of radio waves is…Trending
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