ELI5 How does something become “pressurized” like in an airplane? What are some other examples?

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ELI5 How does something become “pressurized” like in an airplane? What are some other examples?

In: Physics

The most common pressurized stuff that most people used is pneumatic tires used in cars and all types of road vehicles and a lot of other stuff. You pressurize them by forcing air in with a pump sometimes powered by a motor and sometimes by hand.

Airplanes is similar but it is the pressure of the air rundar them that drops but you still uses pumps to force air so the passengers get fresh air.

The pressure in a tire is higher then in the airplane. The atmosphere at sea level is at 14 psi compare to vacuum and the pressure in a aircraft is 11-12 PSI above vacuum and less compare to the air around it. A typical car tire have around 35 PSI over atmospheric pressure So the tire has to hold in over 3 times more pressure then a aircraft.

Even in the vacuum of space you only need 14 PSI to get a sea lever atmosphere so the tire has to handle more pressure then ISS and would not burst if you launched it into space because the pressure only increase to 49 PSI the burst at 200 PSI. You can get 49 PSI a hot day in the sun in a car tire.

Well, air is forced in a airtight eviroment, till the amount of air inside is enough to increase the pressure. Another example are hyperbaric chambers (used both for some therapies and to treat divers with air embolism)

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