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Radius of soap bubble is r. The surface ...

Radius of soap bubble is r. The surface tension of soap solution is T. Keeping temperature constant, the radius of soap bubble is doubled. The energy necessary for this will be....

A

`24pir^2T`

B

`8pir^2T`

C

`12pir^2T`

D

`16pir^2T`

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CHETANA PUBLICATION-MECHANICAL PROPERTIES OF FLUIDS-Exercise
  1. n droplets of equal size of radius r coalesce to form a bigger drop of...

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  2. Two bubbles A and B (A>B) are joined through a narrow tube, then

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  3. Radius of soap bubble is r. The surface tension of soap solution is T....

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  4. A capillary tube of radius r can support a liquid of weight 6.28 xx 10...

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  5. The pressure just below the meniscus of water.......

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  6. A square frame of length L is immersed in a soap solution and taken ou...

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  7. When NaCl is dissolved into water, then its surface tension

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  8. Water rises to capillary tube to a height of 4 cm. If radius of the tu...

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  9. A soap bubble has radius 2 cm. The work done to double the radius is (...

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  10. The surface tension of water at 0^@C is 72 dyne/cm, surface tension of...

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  11. The angle of contact between glass and mercury is

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  12. As the length of the capillary tube is insufficient the rise of liquid...

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  13. The correct relation is

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  14. Surface tension of soap solution is 2 xx 10^-2 N//m. The work done in ...

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  15. The angle of contact between glass and mercury is

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  16. Angle of contact varies between

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  17. Meniscus of Hg in capillary is

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  18. If the surface tension of liquid is T, the work required to increase, ...

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  19. The surface tension of water in C.G.S. units is 30 dyne/cm. Its S.I. u...

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  20. The height of water in a capillary tube of radius 2 cm is 4cm. What sh...

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