question_answer

In rising from the bottom of a lake, to the top, the temperature of an air bubble remains unchanged, but its diameter gets doubled. If h is the barometric height (expressed in m of mercury of relative density p) at the surface of the lake, the depth of the lake is

A) \[8\text{ }\rho hm\]

B) \[\text{7 }\rho hm\]

C) \[\text{9 }\rho hm\]

D) \[\text{12 }\rho hm\]