Two capillary tubes of same diameter are put vertically in each of two liquids. Whose relative densities are 0.8 and 0.6 and surface tensions are 60 and 50 dyne/cm respectively. Ratio of heights of liquids in two tubes are k:10. Find k. (Contact angles for both capillary is same)

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answer is 0009.00.

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Detailed Solution

ρgh=2Tcos⁡θrh1h2=T1T2ρ2ρ1=60×0.650×0.8=3.64=910=K10h1h2=910=k10k=9

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