Choose the incorrect statement about specific gravity
1
The relative density of a material is defined as the ratio of the density of material with the density of air at standard temperature and pressure
2
The specific gravity of a material is defined as the ratio of the mass of material with a mass of water at 4° C
3
The specific gravity of a material is defined as the ratio of the weight of material with the weight of water at 4° C
4
The specific gravity of a material is defined as the ratio of the density of material with the density of water at 4° C.