fundamental quantity


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Related to fundamental quantity: derived quantity, Physical quantity

fundamental quantity

[¦fən·də¦ment·əl ′kwän·əd·ē]
(physics)
References in periodicals archive ?
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.
This idea is termed the anthropic principle, and it applies to any situation in which the value of a physical constant or other fundamental quantity, if changed even a few percent, would preclude life.
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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