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Q.

The pressure inside a small air bubble of radius 0.1mm situated just below the surface of water will be equal to: (Take surface tension of water 70x10-3 Nm-1 and atmospheric pressure = 1.013×105 Nm-2)

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a

2.054×103Pa

b

1.027×103Pa

c

1.027×105 Pa

d

2.054×105Pa

answer is C.

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Detailed Solution

( 3) Pressure when it is in a liquid re inside a  bubble

Po+2TR

1.013×105+2×70×10-30.1×10-3=1.027×105Pa

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