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Grade 12th passMechanics

Please answer this question. Experts please help me to solve this question.

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Profile image of Sahani Kumar
7 Years agoGrade 12th pass
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Profile image of harshin nechooli
7 Years ago
I think the answer is air in liquid since the capillary Rise is due to the unbalanced force of surface tension and surface tension is caused due to the surface area between air and liquid and if you consider the liquid to be Rising without acceleration then the surface tension force has to be a constant does the surface area should be a constant