ρ＝m/V ； The unit of density is kg/m (and: g/cm? ), 1g/cm? = 1000kg/m? .

The unit of mass m is: kilogram.

The unit of volume v is m? .

Density and life

The density of human body is only 1.02 g/cm? Only a little more than the density of water. The density of gasoline is smaller than that of water, so any oil stains you see on the road will float on the water. The density of seawater is greater than that of water, so the human body floats easily in seawater.

The density of the Dead Sea reaches 1.3g/cm? Is greater than human density, so people can float in the dead sea.