Topic 9: Phases of Matter

9.1 Density

We know that some materials are light while some are very heavy. For instance, a cube of aluminium will weigh a lot less than the same size cube of 
copper.

We can systematically compare amount of matter in different materials by
defining a property called density (ρ).

 

Density = mass per unit volume

Where, m is the mass of an object, and V is its volume.
Units of ρ: kgm-3.

9.2 Solids, liquids, gases

9.3 Pressure in fluids