Question

if we change unit of a physical quantity then ​

Answer 1

it will become a water vapour

Explanation:

Then solid Then l8quid

Answer 2

Units of a physical quantity are of two types which are derived and fundamental physical quantity.

The fundamental physical quantities are those which originate from the basic formula of a term. For example the SI unit of

$mass= kg\ (kilogram)$

$speed=\frac{meter}{second}$

$time= second$

The derived quantities are those which are derived by a formula in which basic quantities are used. For example the units of

$Force=\frac{Kg\times m}{s^{2} } =Newton$

If we change the unit of a physical quantity then its magnitude also changes according to the relation between the previous unit and the changed unit.

For example, changing the unit of speed from $\frac{m}{s}$ to $\frac{km}{hr}$ we have to multiply the magnitude with  $\frac{18}{5}$

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