Two narrow bores of diameter 5.0 mum and 8.0 mm are joined together to form a U-sRT DTS 24 Q5

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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, density = 667 kg m³) which rises to height h in the tube. It is observed that the two tangents drawn from liquid-glass interfaces (from opposite sides of the capillary) make an angle of 60° with one another. Then h is close to (g = 10 m s²)

(a) 0.049 m

(b) 0.137 m

(c) 0.172 m

(d) 0.087 m

(2nd Sept 2nd Shift 2020)
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