Question

What are physical quantities?

Answer 1

In physics , A quantity that can be measured is known as physical quantity.

Examples of physical quantity are :
<> Mass

<> Volume

<> Temperature

<> Density

<> Velocity 

A physical quantity always has a unit known as SI unit  or System International Unit

For example :

SI unit of 
<> Force -> Newton(N)

<> Density -> kg/m³

etc....

Answer 2

Physical quantities are termed as physical property of a substance and also expressed by the magnitude .Every physical quantities have units.Without unit there was no physical quantities. 
Ex:-time-seconds,
speed-speedometer,
length-centimeters,kilometer etc
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