What is density with an example

The mass per unit volume of a substance is called density (density = mass/volume). Arrange the following in order of increasing density – air, exhaust from chimney, honey, water, chalk, cotton, and iron. Solution : We can solve this question by keeping this concept in mind:-
The correct order of density for gas , liquid and solid are:-
Gas less than Liquid less than Solid
The given substances in the increasing order of their densities can be represented as: Exhaust from chimney less than Air less than Cotton less than Water less than Honey less than Chalk less than Iron

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