A bulb of constant volume is attached to a manometer tube open at other end as shown in figure. The manometer is filled

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Q 2688812707.     A bulb of constant volume is attached to a manometer tube open at other end as shown in figure. The manometer is filled with a liquid of density (1/3) rd that of mercury. Initially h was 228 cm. Through a small hole in the bulb gas leaked causing pressure decrease as (dp)/(dt) = - kP. If value of h is 114 cm after 7 minutes. Calculate value of k in units of per hour. (Report answer in multiple of 10^-1)

[Use: in (4/3) = 0.28 & density of Hg = 13.6 g/ml]

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