Question

what is density? what is the need for density
tell its importance

Answer 1

HEY MATE...

HERE IS UR ANSWER...

Density is the mass per unit volume.

The formula for calculating density is
$mass \div volume$
The importance of density is. that it is used to tell that whether an object will float on water or not.

HOPE IT HELPS

Answer 2

The degree of compactness of a substance is known as density. Density is important because it effects weather objects will float or sink.