What causes the free surface of a liquid to have minimum area?

What causes the free surface of a liquid to have minimum area?
  1. Viscosity
  2. Surface tension
  3. Diffusion
  4. Pressure

Solution

The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension. The molecules at the surface of a glass of water do not have other water molecules on all sides of them and consequently they cohere more strongly to those directly associated with them.

Asked in: AP EAMCET 2021 (20 Aug Shift 2)

Practice more Mechanical Properties of Fluids questions on Aicharya