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IEVref:112-01-31ID:
Language:enStatus: Standard
Term: quantity equation
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Definition: mathematical relation between quantities in a given system of quantities, independent of units of measurement

NOTE The general form of a quantity equation is f(Q1Q2, ... Qn) = 0, where Q1Q2, ... Qn denote different quantities. A simple form of a quantity equation is Q1 = ζ Q2 Q3, where ζ is a numerical factor.

Examples:

  • T = (1/2) mv2, where T is the kinetic energy and v the speed of a specified particle of mass m;
  • n = I·t/F, where n is the amount of substance of a univalent component, I is the electric current and t the duration of the electrolysis, and where F is the Faraday constant.



Publication date:2010-01
Source:ISO/IEC GUIDE 99:2007 1.22 MOD
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Internal notes:2015-05-07: Image-based entry replaced by character-based entry. JGO
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