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========== You're sitting on a plane trying to relax when a terrible thought crosses your mind:What would happen if that airplane door opened?Commercial airplanes pressurize their cabins to match the atmospheric pressure of 8,000 to 10,000 feet above sea level,even though the cruising altitude of the plane you're in is 30,000 to 45,000 feet in the air.As altitude increases, atmospheric pressure decreases.This is due to Earth's gravitational pull on the air molecules in the atmosphere.The closer to the Earth's surface the stronger the force exerted on these molecules.If the door were opened the plane would depressurize in less than 0.5 seconds.Unless your seat belt is fastened you and any loose objects would immediately be ejecteddue to the d...
