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A liquid is contained in a vertical tube of semi-circular cross-section. The angle of contact is zero fig. What is the ratio of the force of surface tension on the curved part and the flat part of the tube? A. `2 : pi`B. `1 : pi`C. `3 : pi`D. `2.7 : pi` |
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Answer» Correct Answer - A Effective length of flat part = 2r Effective length of curved part is `pi r` So, required ratio is `2 : pi` |
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