Physics Theory : Density
Density is defined as the mass per unit volume of a substance.
Density of water is about 1 g/cm3 or 1000 kg/m3 at room temperature.
Density of air is about 0.001 g/cm3 or 1 kg/m3 at room temperature and atmospheric pressure.
Approximate densities (in g/cm3) of some substances are given below.
When a body floats, it displaces an amount of fluid equal to its own weight.
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