Question

Density has a unit but relative density does not have any unit. Why? What is the correct formula for relative density?

Answer 1

Relative density has no unitbecause it is the ratio of same unitswhich gets cancelled. Answer: ...Relative density = Density of the substance/Density of water at 4°C. As both the numerator and the denominator on the RHS of the aboveformula has the same unit (i.e. kg/m3) they get cancelled