specific gravity = gravity x density

dynamic viscosity = kinematic viscosity x density

gravity = specific gravity x density

kinematic viscosity = dynamic viscosity x density

higher surface tension

lower surface tension

surface tension is no criterion

high density and viscosity

51 cm

50 cm

52 cm

52.2 cm

its vapour pressure is low

it provides suitable meniscus for the inclined tube

its density is less

it provides longer length for a given pressure difference

pco²/R²

pco²/R²/2

2pa2R2

pa2R/2