How many types of physical quality???
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Physical quantity:
Any unit or magnitude used after a value to express it in a certain quantity.
Types:
•Fundamental quantities:
They are the quantities that cannot be expressed or are not derived from any other quantities.
For example:Unit of time , mass , length.
•Derived quantities:
They are the quantities that have been derived or taken from other fundamental quantities.
For example: Unit of area
=length*breadth
=metre*metre
=(m)²
Unit of density
=mass/volume
=kg/m³
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