An air bubble of radius r in water is at a depth h below the water surface at some instant. If P is atmospfieric-pressure and d and T are the density and surface tension of water respectively, the pressure inside the bubble will be:
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a
P+hdg-(4Tlr)
b
P+hdg+(2T/r)
c
P+hdg-(2T/r)
d
P+hdg+(4Tlr)
answer is B.
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Detailed Solution
PTOTAL=P+dgh+2Tris total pressure inside the bubble because outer surface of the bubble is not free.
An air bubble of radius r in water is at a depth h below the water surface at some instant. If P is atmospfieric-pressure and d and T are the density and surface tension of water respectively, the pressure inside the bubble will be: