Density

Density:

The density of a material measures the amount of mass per unit of volume. To find it, you need to know the mass and volume of the object. The formula is. 

Or: 

Note: The symbol for density is r

Other equations are: M = V x r  or  M = Vr          - Equation for working out mass

                                  V =       - Equation for working out Volume

The units are: mass units/volume units³ 

E.g: kg/m³

Example Questions: 

An object has a mass of 25 kg and a volume of 5m³. What is it’s density? 

r =  

r = 25/5 

r = 5 kg/m³. 

An object has a density of 100 kg/m³ and a volume…