Encyclopedia

base quantity

base quantity

[′bās ′kwän·ə·tē]
(physics)
One of a small number of physical quantities in a system of measurement that are defined, independent of other physical quantities, by means of a physical standard and by procedures for comparing the quantity to be measured with the standard. Also known as fundamental quantity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
[1, 2] and unchanged in the New SI) Base quantity Name Base unit Name Symbol time second s length meter m mass kilogram kg electric current ampere A thermodynamic temperature kelvin K amount of substance mole mol luminous intensity candela cd For convenience, "coherent derived units" (see following paragraph) that are particular combinations of base units, or in two cases a different form of a particular base unit, are given special names and symbols.
The current SI seen from the perspective of the proposed New SI
According to New Flyer, the Regional Transportation Commission of Southern Nevada has ordered a base quantity of 15 40-foot, low-floor diesel electric buses with assignable options for an additional 15; South Coast Area Transit in Oxnard, CA has ordered eight 40-foot gasoline electric low-floor buses; and the City and County of Honolulu's Department of Transportation Services has ordered a base quantity of 40 40-foot diesel electric buses with assignable options for an additional 40.
New Flyer Receives Orders for Electric Transit Buses
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