My answer to Why does viscosity of mercury is less than water?
Answer by Arûn Râinâ:
Viscosity of mercury is lesser than of water, because shear stress developed in water is more than mercury, this is taken from the relation viscosity is directly proportional to the shear stress and inversely proportional to velocity gradient.
Viscosity of Mercury is 1.526 cP.
Viscosity of water is 0.894 cP.