fundamental quantity


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Related to fundamental quantity: derived quantity, Physical quantity

fundamental quantity

[¦fən·də¦ment·əl ′kwän·əd·ē]
(physics)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Also, from vector analysis, it is well known that d[bar.S] (r, [theta], [phi]) is the most fundamental quantity from which all vector and scalar quantities required for the formulation of the dynamical theory of classical mechanics are derived.
But it's amazing to realize how easy it is these days to measure a fundamental quantity that many ancient and medieval astronomers would have gladly given their lives to learn.
In this case, the flow velocity multiplied by the length of the path along the center of the toroidal channel must be zero or a whole-number multiple of a fundamental quantity determined by Planck's constant and the mass of a helium atom.

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