In rising from the bottom of a lake to its surface, the temperature of air bubble remains constant but its diameter gets doubled. If h is the barometric height…

Q: In rising from the bottom of a lake to its surface, the temperature of air bubble remains constant but its diameter gets doubled. If h is the barometric height (expressed in metre of mercury of relative density ρ) at the surface of a the lake, the depth of the lake is βhp. Find the value of  β. (Neglect effects of surface tension)

(a) 2

(b) 5

(c) 7

(d) 9

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Ans: (c)