Question

The units of surface tension and viscosity of liquids respectively are:

• A. $kg{m}^{-1}{s}^{-1},N{m}^{-1}$
• B. $kg{s}^2,kg{m}^{-1}{s}^{-1}$
• C. $N{m}^{-1},kg{m}^{-1}{s}^{-2}$
• D. $kg{s}^{-1},kg{m}^{-2}{s}^{-1}$

Answer 1

The correct option is C $N{m}^{-1},kg{m}^{-1}{s}^{-2}$

The units of surface tension and viscosity of liquids respectively are
$kg{s}^{-2},kg{m}^{-1}{s}^{-1}$
Surface tension is the force acting per unit length perpendicular to line drawn on the surface of liquid.
Its unit can also be expressed as $N/m$
Viscocity is the force of friction between layers of liquid. Its unit can also be expressed as
$Ns{m}^{-2}$