fundamental quantity


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Related to fundamental quantity: derived quantity, Physical quantity

fundamental quantity

[¦fən·də¦ment·əl ′kwän·əd·ē]
(physics)
base quantity
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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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.
Relativistic dynamical theory for test particles and photons in static spherically symmetric gravitational fields
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.
Measuring the astronomical unit from your backyard: two astronomers, using amateur equipment, determined the scale of the solar system to better than 1%. So can you
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.
Superfluid gyro detects Earth's spin

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