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An opening of area 0.278 cm2 in an otherwise closed beverage keg is 54.1 cm below the level of the liquid (of density 0.919 g/cm3) in the keg.

An opening of area 0.278 cm2 in an otherwise closed beverage keg is 54.1 cm below the level of the liquid (of density 0.919 g/cm3) in the keg. What is the speed of the liquid flowing through the opening if the gauge pressure in the air space above the liquid is (a) zero and (b) 0.438 atm?

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