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A bubble is at the bottom of the lake of depth h. As the bubble comes to sea level, its radius increases three times. If atmospheric pressure is equal to L meters of water column, then h is equal to NL the value N is…

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answer is 26.

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Detailed Solution

As temperature is constant Boyle's law can be used

$P_{1} V_{1} = P_{2} V_{2}$

$here P_{1} = L + h and P_{2} = L$

$and V_{1} = V and V_{2} = 27 V (as V \propto R^{3})$

$(L + h) V = 27 V (L)$

$h = 26 L$

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