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  • Water rise in a capillary tube to a certain height such that the upward force due to surface tension is balanced by <img alt="75 * 10^{-4} N" src="https://entrancecorner.oncodecogs.com/gif.lat

Water rise in a capillary tube to a certain height such that the upward force due to surface tension is balanced by 75 * 10^{-4} N force due to the weight of the liquid. If the surface tension of water is 6 * 10^{-2} N/m, then the inner circumference of the capillary must be:

Option: 1

1.25 * 10^{-2} m


Option: 2

0.50 * 10^{-2} m


Option: 3

6.5 * 10^{-2} m


Option: 4

12.5 * 10^{-2} m


Answers (1)

best_answer

16 * 10^{-2}* circumference = force

\therefore circumference = 75 * 10^{-4} / 6 * 10^{-2}                                                   = 12.5 * 10^{-2} m 

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