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Q.

An air bubble of radius 0.1 cm is in a liquid having surface tension 0.06 N/m and density 103 kgm-3 . The pressure inside the bubble is 1100 Nm-2 greater than the atmospheric pressure. AT what depth is the bubble below the surface of the liquid?

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a

0.1 m

b

0.15 m

c

0.20 m

d

0.25 m

answer is A.

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Detailed Solution

Ptotal =dgh+2TR+P0ΔP=dgh+2TR1100=103×9.8×h+2×6×10−210−1×10−2980=103×9.8×h⇒h=0.1m
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