A physical quantity is a physical property of a phenomenon, body, or substance, that can be quantified by measurement.
Read more about Physical Quantity: Definition of A Physical Quantity, Extensive and Intensive Quantities, Symbols, Nomenclature, Units and Dimensions, Base Quantities, Physical Quantities As coordinates Over Spaces of Physical qualities (philosophy)
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“Perhaps it is the lowest of the qualities of an orator, but it is, on so many occasions, of chief importance,a certain robust and radiant physical health; orshall I say?great volumes of animal heat.”
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