AP EAMCET202120 Aug 2021Evening ShiftPhysicsMechanical Properties of FluidsActual

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

Options

AViscosity
BSurface tension
CDiffusion
DPressure

Correct answer

B. Surface tension

Step-by-step 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.

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