Question

1. Define surface tension. Write formula, unit and dimension of surface tension.

Answer 1

the force per unit length is called surface tension
 γ(gamma)=F/l

unit-N/m
in cgs (dyne/cm)
dimention MT -2

Answer 2

A molecule in the bulk of a liquid experiences equal intermolecular forces from all sides. the molecule there for does not experience any net force is called surface tension. dimension kg s-2 and unit Nm-1