Question: what is the dimensional formula of relative density?
Answer: Relative Density of a substance ( R.D.) = Density of the substance/Density of water, So, the R.D. is a simple ratio or a number.It has no units or dimensions. For example, the density of iron is 8.5 GM's/cm^3 & the density of water is 1 gm/cm^3 (in cgs Units).