Surface tension S of a liquid surface is defined as the force acting per unit length…
PHYSICS · Subjective · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids
Problem
Surface tension S of a liquid surface is defined as the force acting per unit length along the surface.
(i) Is surface tension a base quantity or a derived quantity? Give a brief reason.
(ii) Obtain the dimensional formula for surface tension.
(iii) Write the SI unit of surface tension.
(iv) A thin wire ring of length 0.25m is gently placed on the surface of water. If a horizontal force of 0.0375N is just sufficient to lift the ring clear of the surface, calculate the surface tension of water.