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Fluid Mechanics and Hydraulic Machinery Miscellaneous

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Fluid Mechanics and Hydraulic Machinery

Fluid Mechanics and Hydraulic Machinery Miscellaneous
  1. The difference in pressure (in N/m2) across an air bubble of diameter 0.001 m immersed in water (surface tension = 0.072 N/m) is_____.
    1. 88 N/m2
    2. 288 N/m2
    3. 28 N/m2
    4. None of these
Correct Option: B


Surface tension in a bubble =
Δp.r
4

we know, Pi – Po =
4T
r

Δp =
4 × 0.072
= 288 N/m2.
0.01


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