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Second — This article is about the unit of time. For other uses, see Second (disambiguation). A light flashing approximately once per second. The second (SI unit symbol: s; informal abbreviation: sec) is a unit of measurement of time, and is the… … Wikipedia
star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… … Universalium
mechanics — /meuh kan iks/, n. 1. (used with a sing. v.) the branch of physics that deals with the action of forces on bodies and with motion, comprised of kinetics, statics, and kinematics. 2. (used with a sing. v.) the theoretical and practical application … Universalium
Litre — One litre is equivalent to this cube Each side is 10 cm 1 litre water = 1 kilogram water (at 4 °C) The litre (or liter see spelling differences) is a unit of volume equal to 1 cubic decimetre (dm3), to 1,000 cubic centimetres… … Wikipedia
surveying — /seuhr vay ing/, n. 1. the science or scientific method of making surveys of land. 2. the occupation of one who makes land surveys. 3. the act of one who surveys: The surveying required nearly two days. [1425 75; late ME: act of examining… … Universalium
History of film — This article is about the history of cinema. For other uses, see History of photography. Years in film 1870s 1880s 1890s … Wikipedia
spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… … Universalium
Joule — This article is about the unit of energy. For other uses, see Joule (disambiguation). Joule Unit system: SI derived unit Unit of... Energy Symbol: J Named after: James Prescott Joule … Wikipedia
International System of Units — SI redirects here. For other uses, see Si (disambiguation). Cover of brochure The International System of Units The International System of Units[1] (abbreviated SI from French: Système international d unités[2]) is the modern … Wikipedia
Geodesy — (pronEng|dʒiːˈɒdɪsi [OED] ), also called geodetics, a branch of earth sciences, is the scientific discipline that deals with the measurement and representation of the Earth, including its gravitational field, in a three dimensional time varying… … Wikipedia
SI base unit — The seven SI base units and the interdependency of their definitions The International System of Units (SI) defines seven units of measure as a basic set from which all other SI units are derived. These SI base units and their physical quantities … Wikipedia