Question

Why we should not open the window in the jet aeroplane to get fresh air?

Answer 1

Bcoz as we go up the atmospheric pressure gets high so due to the increase of the atmospheric pressure if we open the window then we can die bcoz that much amount of air pressure is too much for us and we cannot breathe hence we can die

Answer 2

Were you to open a plane window, the compressed air inside would rapidly rush out, atmospheric conditions inside and outside the plane would equalize, and everybody would die.

Gravity tends to keep air molecules concentrated near the ground, so the atmosphere thins out as you go up. The air becomes so thin at 10,000 feet (3,000 meters) or so that airplane cabins must be pressurized above that altitude to prevent occupants from suffering from hypoxia, or lack of oxygen. Because temperature and pressure go hand-in-hand (i.e. low-pressure air feels cold), pressurization is also necessary to keep cabins sufficiently warm. At 35,000 ft. (11,000 m), the typical altitude of a commercial jet, the air pressure drops to less than a quarter of its value at sea level, and the outside temperature drops below negative 60 degrees Fahrenheit (negative 51 degrees Celsius),