IEVref: | 112-01-34 | ID: | |

Language: | en | Status: Standard | |

Term: | numerical value equation | ||

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Definition: | mathematical relation between numerical values based on a given quantity equation and specified units of measurement
NOTE - For the quantities EXAMPLE In the quantity equation for kinetic energy of a particle, | ||

Publication date: | 2010-01 | ||

Source | ISO/IEC GUIDE 99:2007 1.25 MOD | ||

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Internal notes: | 2015-05-07: Image-based entry replaced by character-based entry. JGO | ||

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NOTE - For the quantities *Q*_{1}, *Q*_{2} and *Q*_{3} related by the quantity equation *Q*_{1} = *ζ* *Q*_{2} *Q*_{3}, the numerical value equation is {*Q*_{1}} = *ζ* {*Q*_{2}} {*Q*_{3}}, where {*Q*_{1}}, {*Q*_{2}}, and {*Q*_{3}} denote the numerical values of *Q*_{1}, *Q*_{2}, and *Q*_{3}, respectively, provided that they are expressed in base units or coherent derived units.

EXAMPLE In the quantity equation for kinetic energy of a particle, *T* = (1/2) *m**v*^{2}, if *m* = 2 kg and *v* = 3 m/s, then {*T*} = (1/2) × 2 × 3^{2} is a numerical value equation giving the numerical value 9 of *T* in joules.