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0 A capillary tube made of glass of radius 0.15 mm is dipped vertically in a beaker filled with methylene iodide (surface tension = 0. 05 Nm – l , density = 667 kg m – 3 ) which rises to height h in the tube. It is observed that the two tangents drawn from liquid - glass interfaces (from opp. sides of the capillary) make an angle of 60° with one another. Then h is close to (g = 10 ms – 2 ).

1. 0.1 37 m
2. 0.172 m
3. 0.087 m
4. 0.049 m

Correct answer: 0.087 m

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