what do you mean by physical quantity ??
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A physical quantity is a property of a material or system that can be quantified by measurement. ... For example, the physical quantity mass can be quantified as n kg, where n is the numerical value and kg is the unit.
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All the quantities in terms of which laws of physics are described, and whose measurement is necessary are called physical quantities. Units. A definite amount of a physical quantity is taken as its standard unit. The standard unit should be easily reproducible, internationally accepted.
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