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LESSON NOTES


               Density (ρ)
              The mass per unit volume is called density of an object.

              Density (ρ) = Mass(M)/Volume(V)
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              SI unit of density = kg/m
               Relative density/ Specific Gravity

              It is the ratio of the density of a substance to the density of water.







              Since relative density is a ratio of similar quantities, it has no unit.
               Applications of density

              If an object has density more than that of the liquid, it will float over that liquid.
              If an object has density lower than that of a liquid, it will sink in that liquid.

              When the relative density of a substance is less than 1, it will float in water otherwise it
               will sink in water.
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