Question

Surface tension is expressed in​

Answer 1

Explanation:

Surface tension may be expressed, therefore, in units of energy (joules) per unit area (square metres). Water has a surface tension of 0.07275 joule per square metre at 20 °C (68 °F).

On this basis, surface tension is often expressed as an amount of force exerted in the surface perpendicular to a line of unit length.