DENSITY

Define density .What is the SI unit of density ? (b) Define relative density .What is the SI unit of relative density ? The density of turpentine is 840kg//m^(3) .What will be its relative density ? (Density of water =1000 kg //m^(3))

Assertion (A) : Physiological density is preferable to arithmetic density as an index of population density. Reason ( R) : Physiological density is based on arable land while arithmetic density is based on total area.