First slide

laws

Question

A bubble rises from the bottom of a 70 m deep lake and on reaching the surface, its volume becomes (take atmospheric pressure as that of 10 m column of water and assume that the temperature is constant)

Moderate

A

4 times
B

8 times
C

10 times
D

3 times

Solution

$i n s i d e p r e s s u r e = (P_{0} + h d g) a n d o n t h e s u r f a c e p r e s s u r e i s P_{0} = 10 m o f w a t e r p r e s s u r e a p p l y i n g B o y l e' s l a w (10 + 70) V_{1} = 10 V_{2} V_{2} = 8 V_{1}$

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