AP EAPCET 25-Aug-2021 Shift 2 Paper

Relative velocity (vA±vB) for two bodies A and B has both units (ms−1) and dimensions [LT−1].
Relative density of two substances (ρ=

ρA

ρB

)A and B have no units and no dimensions.
Angle is measured in radian. Thus, it has units but no dimensions.
Energy is measured in joule and has dimensions[ML2T−2].
Hence, only relative density has neither unit nor dimensions.