What is density of a substance? I Obtain its SI unit.

1.	What is density of a substance? I Obtain its SI unit.
Answer» The density of a substance is the ratio of its mass to volume. The SI unit of density = \(\cfrac{the\,SI\,unit\,of\,mass}{the\,SI\,unit\,of\,volume}\) = kg/m³ [Note: Density is useful in determining the purity of a substance. The CGS unit of density is g/cm³ . 1 kg/m³ = 10³ g/(100 cm)³ = 10^-3 g/cm³ ∴ 1g/cm³ = 1000 kg/m³}

Answer»

The density of a substance is the ratio of its mass to volume.

The SI unit of density = \(\cfrac{the\,SI\,unit\,of\,mass}{the\,SI\,unit\,of\,volume}\) = kg/m³

[Note: Density is useful in determining the purity of a substance. The CGS unit of density is g/cm³ .

1 kg/m³ = 10³ g/(100 cm)³ = 10^-3 g/cm³

∴ 1g/cm³ = 1000 kg/m³}

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