Question

When a large bubble rises from the bottom of a lake to the surface its radius doubles. If atmospheric pressure is equal to that of column of water height H then the depth of lake is

Answer 1

TOP = bottem

p1v1 = a p2v2 p=atmospheric pressure

p*4/3π(2r)^3=(p+h*density*g) *4/3πr^3

p*8 =(p+h*density*g)

7p/(density*g) =h