![]() ![]() ![]() Here h W is the physical quantity, its value expressed in the unit "meter," unit symbol m, is 169 m, and its numerical value when expressed in meters is 169. Example: the value of the height h W of the Washington Monument is h W = 169 m.Thus, the numerical value of a particular physical quantity depends on the unit in which it is expressed. The value of a physical quantity is the quantitative expression of a particular physical quantity as the product of a number and a unit, the number being its numerical value.A unit is a particular physical quantity, defined and adopted by convention, with which other particular quantities of the same kind are compared to express their value.A physical quantity is a quantity that can be used in the mathematical equations of science and technology.Examples are the mass of the moon and the electric charge of the proton. ![]() A quantity in the particular sense is a quantifiable or assignable property ascribed to a particular phenomenon, body, or substance.National Type Evaluation Program (NTEP)Ī quantity in the general sense is a property ascribed to phenomena, bodies, or substances that can be quantified for, or assigned to, a particular phenomenon, body, or substance.National Conference on Weights and Measures (NCWM).External Resources for Weights and Measures Expand or Collapse.Fuels and Lubricants Subcommittee (FALS).National Legal Metrology Expand or Collapse. ![]()
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