Write a difference between a fundamental physical quantity on diraid the physical quantity
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What is difference between physical quantity and fundamental quantity?
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Mike Schneids, studies Astronomy at Rochester Institute of Technology (2023)
Answered June 12, 2018
Physical quantities are anything that can be quantified. That is, anything that can be given a magnitude, even if it has no associated unit (dimensionless quantity).
For example, a radian is a dimensionless quantity. It does not change in magnitude. A radian is always equal to about 57.3 degrees. A degree of an angle is also dimensionless.
For the most part though, physical quantities have units associated with them. All of these units are either, themselves, base units, or derived from base units.
Thats where fundamental quantities come in, also known as base units. Base units, or fundamental quantities, are not derived. Their units were arbitrarily defined to be what they are, and these base units are used to derive all other units.
There are seven base units.
Mass (kilogram)
Length (meter)
Time (second)
Temperature (kelvin)
Charge (ampere)
Luminosity (candela)
Amount of substance (mole)