d See page 440 A passenger at Chicago Rockford International Airportis waiting t

Question

d See page 440 A passenger at Chicago Rockford International Airportis waiting to board an airplane with a mercury barometer. The atrmospheric pressure that day on the ground is 29.81 inches of Hg The flight will eventualy reach a cruisingaltitude of 40,000ft, but the pressurized cabin pressure maintained at 6,500ft. The passenger is told this cruising pressure willbe 1170 psi What is the change in the height of the mercury column passenger should see on the barometer? Vacsum 3rd attempt Weight of mexury column Height of mencury Armospheric Part1 (1 point) al See Periodic Table QSee Hint mm Hg Mercury podl

Explanation / Answer

atmospheric pressure on the ground = 29.81 inches of Hg

1 atm = 760 mm Hg = 29.92 in Hg

Pressure at ground in mm Hg = 29.81/29.92 * 760 = 757.205 mm Hg

Curising pressure = 11.70 psi

1 psi = 51.4784 mm Hg

Cruising Pressure in mm Hg = 11.70 psi * 51.4784 mm Hg/1 psi = 605.06 mm Hg

Change in height of mercury column = 757.205 - 605.06 = 152.145 mm Hg

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