A bubble of gas released at the bottom...

A bubble of gas released at the bottom of a lake increases to four times its original volume when it reaches the surface. Assuming that atmospheric pressure is equivalent to the pressure exerted by a column of water 10 m high, what is the depth of the lake?

80 m

90 m

40 m

70 m

Text Solution

Verified by Experts

The correct Answer is:

`P_(1)V_(1)` (underwater) `= P_(2)V_(2)` (surface)
depth `= xm`
`(x + 10) V = 10 xx 8 V`
`:. x = 70 m`

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