A capillary tube made of glass of radius...

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"^(-1) ` 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))`

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