When a long glass capillary tube of radius is dipped in a liquid

PHYSICS · Subjective · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids

Problem

When a long glass capillary tube of radius

0.015\ \text{cm}

is dipped in a liquid, the liquid rises to a height of

15\ \text{cm}

within it. If the contact angle between the liquid and glass is close to

0^\circ

, the surface tension of the liquid, in milliNewton

\text{m}^{-1}

, is

[\rho_{(\text{liquid})} = 900\ \text{kg}\ \text{m}^{-3},\ g = 10\ \text{m}\ \text{s}^{-2}]

(Give answer in closest integer)