surface tension
When water is filled carefully in a glass, one can fill it to a height h above the rim of the glass due to the surface tension of water. To calculate h just before water starts flowing, model the shape of the water above the rim as a disc of thickness h having semicircular edges, as shown schematically in the figure. When the pressure of water at the bottom of this disc exceeds what can be withstood due to the surface tension, the water surface breaks near the rim and water starts flowing from there. If the density of water, its surface tension and the acceleration due to gravity are 103kg m−3, 0.07 Nm−1 and 10 ms−2, respectively, the value of h (in mm) is ___.
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@Gyro Gearloose
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.how do i solve this using force balance
i did it using excess pressure, but the force balance eqn gives another result, can someone pls show how to use force balance here
the ans is 3.74 ig
what i did
why will it be 2Tl, the force Tl is actign throughout the circumeference so its realy just a singular force
hmm okay but there's an interface near the lower surface too right wait ill send another question very similar to this one
force balance works pretty well here (unless im doing it wrong) how would u solve this using force balance
the former q doesnt mention any angle, but it says semicircular wtv, so i took an additional Tl. i dont understand
ohh yea ur right mb didnt see that, theres air water interface and beaker and water so 2 diff forces of ST right
yup this would be same as wha u did above
okay
idk why the solns dont match in the first one
jee has the wrong ans most prolly
and afaik they didnt corrected it till now
ah okay
thanks a bunch
+solved @integralofe^2v
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