1. What is Density?
Density is the amount of matter of an object per unit volume. Density is usually measured in kilograms per cubic metres (kg/m³) or grams per cubic centimetres (cm³).
Mass is the amount of matter in an object. Mass is usually measured in kilograms (kg) or grams (g).
Volume is the amount of 3D space an object takes up. It is usually measured in litres or cubic metres or cubic centimetres.
These properties are interlinked together such that if you are given any two of them you can easily calculate the third one.
2. The formula triangle for density
The formula triangle for density is an easier way to remember the relation among mass, volume and density.
This is the way we use these triangles:-
Where
M → Mass
D → Density
V → Volume
Examples:
1. An object with mass 2 kg and has a volume of 100 g/cm³. Calculate its density.
2. Water has a density of 1000 g/cm³ so what will be the mass of 5 litres of water?
3. An steel object of density 25 kg/m³ has a mass of 500 kg. Calculate the volume of this steel object.
