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On heating water, bubbles being formed a...

On heating water, bubbles being formed at the bottom of the vessel detach and rise. Take the bubbles to be spheres of radius R and making a circular contact of radius r with the bottom of the vessel. If `rlt ltR` and the surface tension of water is T, value of r just before bubbles detach is: (density of water is `rho_w`)

A

`R^(2)sqrt((rho_(w)g)/(T))`

B

`R^(2)sqrt((3rho_(W)g)/(T))`

C

`R^(2)sqrt((2rho_(w)g)/(3T))`

D

`R^(2)sqrt((rho_(w)g)/(6T))`

Text Solution

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The correct Answer is:
B
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ALLEN -ELASTICITY, SURFACE TENSION AND FLUID MECHANICS-Exercise 5 A (Previous year Questions)
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  12. There is a circular tube in a vertical plane. Two liquids which do not...

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  13. On heating water, bubbles being formed at the bottom of the vessel det...

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  14. If it takes 5 minutes to fill a 15 litre bucket from a water tap diame...

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  15. If two glass plates have water between them and are separated by very ...

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  16. Consider a water jar of radius R that has water filled up to height H ...

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  18. A simple pendulum made of bob of mass m and a metallic wire of neglig...

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