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physical half-life period

См. также в других словарях:

  • Half-life — This article is about the scientific and mathematical term. For other uses, see Half life (disambiguation). Number of half lives elapsed Fraction remaining Percentage remaining 0 1/1 100 1 1/2 50 2 …   Wikipedia

  • half-life — The period in which the radioactivity or number of atoms of a radioactive substance decreases by half; similarly applied to any substance, such as a drug in serum, whose quantity decreases exponentially with time. Cf.:half time. biologic half… …   Medical dictionary

  • Half-Life 2 — Cover art showing the series protagonist, Gordon Freeman Developer(s) Valve Corporation …   Wikipedia

  • Characters of Half-Life — This is a list of characters in the Half Life series of games, which comprises Half Life, Half Life 2 and their respective expansion packs and episodes. Contents 1 Introduced in Half Life and expansion packs 1.1 Gordon Freeman 1.2 The G Man …   Wikipedia

  • physical science — physical scientist. 1. any of the natural sciences dealing with inanimate matter or with energy, as physics, chemistry, and astronomy. 2. these sciences collectively. [1835 45] * * * Introduction       the systematic study of the inorganic world …   Universalium

  • Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …   Universalium

  • life — I. noun (plural lives) Etymology: Middle English lif, from Old English līf; akin to Old English libban to live more at live Date: before 12th century 1. a. the quality that distinguishes a vital and functional being from a dead body b. a… …   New Collegiate Dictionary

  • Life — • The enigma of life is still one of the two or three most difficult problems that face both scientist and philosopher Catholic Encyclopedia. Kevin Knight. 2006. Life     Life      …   Catholic encyclopedia

  • Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

  • Life expectancy — This article is about the measure of remaining life. For the Dean Koontz novel, see Life Expectancy (novel). For List of countries by life expectancy, see List of countries by life expectancy. Life expectancy is the expected (in the statistical… …   Wikipedia

  • Physical attractiveness — …   Wikipedia

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