Liquid or gas Approx.viscosity in Pa.s Hydrogen 10-5 Air 2x105 Petrol 3×104 Water 103 Lubricating oil 10-1 Glycerol 100(i.e.1) Corn syrup 103 Bitumen 109 Approximate viscosities of some common Newtonian fluids. ● the viscosity of the solvent or continuous phase,ns,Pa.s; ● dimensionless relative viscosity,nr,which is the ratio of the viscosity of a suspension to its continuous phase viscosity,n/ns; ● the dimensionless specific viscosity,nsp,given by n-1; ● the intrinsie viscosity,[n](with dimensions m3.kg1)which is the specific viscosity divided by the concentration c of a dispersed phase,(nr-1)/c; the kinematic viscosity,v=n/p which in pre-SI days had the dimensions of centi-Stokes,cS,for thin liquids,with water at 20C~1 cS