Question

When an air bubble rises from bottom of the lake to the surface its radius doubles?

Answer 1

payavmahi maj nahi ayay

Answer 2

We know that 

P1V1 = P2V2

So pressure is directly proportional to volume

So if pressure increase volume increases and vice versa. 


At the bottom of a lake the pressure is very height due to depth and low temperature. 

When the bubble rises at the surface the pressure gradually decreases and hence  volume increases and radius too with area.

We also know that pressure is inversely proportional to area of cross section

So since pressure decreases the area increases and radius too.

I would suggest it's wrong to say radius gets doubled since there's no mention of pressure being reduced to have or a thing like that..

Thank u ★ ★ ★
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