## Subtitles section Play video

• 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 ejected due to the difference in pressure.

• During such a scenario survival rates are very slim given the possibility of the entire plane breaking apart.

• Because the air is substantially thinner at high altitudes there is substantially less oxygen.

• A gradual decompression in the cabin will cause the oxygen mask to drop from above

• and on average you have 18 seconds to put the mask on before hypoxia kicks in.

• Hypoxia occurs when oxygen levels decrease, causing symptoms of nausea, dizziness and unconsciousness leading to death.

• The oxygen reserves on the plane would last for only 10 minutes.

• Enough for the pilot to descend rapidly to 8,000 to 10,000 feet

• to match both the internal and external pressures and give you hope for survival.

• Freaked out yet?

• Don't worry, the chances of the door opening are so small

• because there's eight to ten pounds of pressure exerted on every square inch of the plane.

• Remember there's more pressure inside the cabin than outside.

• Using the largest commercial airplane the Airbus A380 as an example,

• the main door measures 4288 square inches,

• meaning a 38,592 pounds of force would be required to even begin to open it.

• To compare this would be equivalent of you trying to move 3 African bush elephants -

• the largest land mammals on earth.

• Additionally, plane doors are almost always electronically locked by the pilot

• through functions accessible only from inside the cockpit.

• And to ease your worries more:

• It would also be nearly impossible for someone to punch and break through an airplane window.

• These windows can also be made with up to six layers of various types of strong polymers and are bulletproof.

• Furthermore, these windows are almost always rounded to decrease drag while in flight,

• thereby preventing cracks and decompression.

• You're more likely to die in a car than during aviation with a 1/114 chance of car accidents compared to 1/9821 for air travel related accidents.

• So fasten your seat belts, pay attention to your safety videos, and above all enjoy the flight.

• Thank you so much for watching! Make sure you subscribe,

• because we make new science videos every Thursday.

• And click the bell because apparently it does something.

• If you want to watch more right now, we'll link a couple videos over here that you can check out

• to satisfy your science needs,

• Otherwise we'll see you next Thursday for a new video.

• Peace!

You're sitting on a plane trying to relax when a terrible thought crosses your mind:

Subtitles and vocabulary

Operation of videos Adjust the video here to display the subtitles

B1 US plane airplane oxygen pressure door atmospheric pressure

# What If Your Airplane Door Burst Open Mid-Flight?

• 11030 829
Samuel posted on 2018/02/21
Video vocabulary