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  • 181 Demographics of the People's Republic of China — Demographics of People s Republic of China Population of China, 1961–2008 Population: 1,339,724,852 (2010 census) (1st) Growth rate: 0.47% (2009 est.) (156th) …

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  • 182 Quantum mechanics — For a generally accessible and less technical introduction to the topic, see Introduction to quantum mechanics. Quantum mechanics …

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  • 183 Quartz clock — A quartz clock is a clock that uses an electronic oscillator that is regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks are at least an order of magnitude more… …

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  • 184 Physical law — A physical law or scientific law is a scientific generalization based on empirical observations of physical behavior (i.e. the law of nature [ E.g. an observable law relating to natural phenomena. Oxford Dictionary] ). Laws of nature are… …

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  • 185 Hubble Space Telescope — Infobox Space telescope name = Hubble Space Telescope (HST) caption = The Hubble Space Telescope as seen from Space Shuttle Discovery during its second servicing mission (STS 82) organization = NASAESASTScI alt names = nssdc id =… …

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  • 186 Atmospheric reentry — refers to the movement of human made or natural objects as they enter the atmosphere of a planet from outer space, in the case of Earth from an altitude above the edge of space. This article primarily addresses the process of controlled reentry… …

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  • 187 Battle of the Little Bighorn — Coordinates: 45°33′54″N 107°25′44″W / 45.565°N 107.42889°W / 45.565; 107.42889 …

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  • 188 Watch — For other uses, see Watch (disambiguation). Early wrist watch by Waltham, worn by soldiers in World War I (Deutsches Uhrenmuseum, Inv. 47 3352) A watch is a small timepiece, typically worn either on the wrist or attached on a chain and carried in …

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  • 189 Surveying — For other uses, see Survey (disambiguation). US Navy Surveyor at work with a leveling instrument …

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  • 190 Pipette — A pipette (also called a pipet, pipettor or chemical dropper) is a laboratory instrument used to transport a measured volume of liquid.Use and variationsPipettes are commonly used in chemistry and molecular biology research as well as medical… …

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  • 191 Primary source — [ [http://www.lib.umd.edu/guides/primary sources.html Primary, Secondary and Tertiary Sources, UM Libraries] ] [ [http://www.library.jcu.edu.au/LibraryGuides/primsrcs.shtml JCU Primary, Secondary Tertiary Sources] ] is a term used in a number of… …

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  • 192 Squaring the circle — Squaring the circle: the areas of this square and this circle are equal. In 1882, it was proven that this figure cannot be constructed in a finite number of steps with an idealized compass and straightedge …

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  • 193 Density functional theory — Electronic structure methods Tight binding Nearly free electron model Hartree–Fock method Modern valence bond Generalized valence bond Møller–Plesset perturbation theory …

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  • 194 Single bullet theory — The Single Bullet Theory (or Magic Bullet Theory, as it is commonly called by its critics) was introduced by the Warren Commission to explain how three shots made by Lee Harvey Oswald resulted in the assassination of United States President John… …

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  • 195 Starscream — is the name of several the fictional characters in the various series Transformers universes. Transformers: Generation 1Transformers character name = Starscream caption = affiliation = Decepticon subgroup = Micro Vehicles, Seekers, Pretenders,… …

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  • 196 Astronomical clock — An astronomical clock is a clock with special mechanisms and dials to display astronomical information, such as the relative positions of the sun, moon, zodiacal constellations, and sometimes major planets. DefinitionThe term is loosely used to… …

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  • 197 William Roy — Infobox Scientist name = William Roy box width = birth date = 4 May 1726 birth place = Milton Head, Carluke Parish, Scotland death date=death date and age|1790|7|1|1726|5|4|mf=y death place = London, England nationality = British (Scottish) field …

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  • 198 Killian documents controversy — Further information: Killian documents authenticity issues and George W. Bush military service controversy Charles Johnson s animated GIF image comparing what CBS claimed to be a 1973 era typewritten memo with a 2004 era Microsoft Word… …

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  • 199 Fivefold ministry — refers to an ecclesiology or system of church organization utilized by a variety of religious movements (usually Christian). The term fivefold ministry is derived by those who adhere to it from references in the Christian New Testament to the… …

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  • 200 Optimus Primal — is a fictional character from the Transformers toyline, and the leader of the Maximal forces and the main protagonist in the Beast Wars television series. He is sometimes called Optimal Optimus. The name Optimus Primal was given to Optimus Prime… …

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