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This list contains acronyms, initialisms, and pseudo-blends that begin with the letter D. For the purposes of this list: acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome , pronounced to rhyme with cars
The time required for a quantity to fall to half its value as measured at the beginning of the time period. In physics, half-life typically refers to a property of radioactive decay, but may refer to any quantity which follows an exponential decay. Hamilton's principle Hamiltonian mechanics harmonic mean heat
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A-type star In the Harvard spectral classification system, a class of main-sequence star having spectra dominated by Balmer absorption lines of hydrogen. Stars of spectral class A are typically blue-white or white in color, measure between 1.4 and 2.1 times the mass of the Sun, and have surface temperatures of 7,600–10,000 kelvin.
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
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Applied mechanics – describes the behavior of a body, in either a beginning state of rest or of motion, subjected to the action of forces. [21] Applied mechanics, bridges the gap between physical theory and its application to technology. It is used in many fields of engineering, especially mechanical engineering and civil engineering.
References 0–9 2-for-1 A strategy used within the last minute of a period or quarter, in which the team with possession times its shot to ensure that it will regain possession with enough time to shoot again before time runs out. Applicable in competitions that use a shot clock (all except NFHS in most US states). 3-and-D Any player, typically not a star, who specializes mainly in three ...