The pressure outside a jet plane flying at high altitude falls considerably below atmospheric pressure at sea level. The air inside the cabin must therefore be pressurized to protect the passengers. W

Question

The pressure outside a jet plane flying at high altitude falls considerably below atmospheric pressure at sea level. The air inside the cabin must therefore be pressurized to protect the passengers. What is the pressure (in atmosphere) in the cabin if the barometer reading is 688 mm of Hg?

Prashant Kotian · Accepted Answer

Correct answer: A. Pressure in atmospheres is calculated by dividing the pressure in mm of Hg by 760. Pressure = 688 mm Hg / 760 mm Hg/atm = 0.905 atm.

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