death happens if the airplane is over 20000 feet
Airplane cabins are pressurized because humans cannot breath at a very high elevation.Aircraft are pressurized to allow them to fly higher. Without pressurization, the amount of oxygen in the air would not be sufficient for humans to breathe.
yes, the cabin and cargo holds are pressurized.
nope, the luggage compartment as well as the cabin are both pressurized.
Yes. Airplane cabins are usually pressurized to around 5,000 feet. So imagine you are just boiling water at 5,000 feet.
They have restrooms.
To the What?
Airplane mode?
Jet or rocket powered, with a pressurized cabin.
The percentage of Oxygen in the air is the same in airplane as it is outside the airplane. The only difference is the pressure levels. If the pressure drops too much then the total amount of Oxygen will be insufficient for you to breath and you will pass out. The airplane only carries oxygen for use in emergency and is dispensed in the oxygen masks of the crew and passengers. Maybe your Question is asking what the total volume of oxygen is available in a pressurized airplane. I don't know that.
you will get explosive decompressions (at least if the plane is flying so the cabin is pressurized) the air-pressure in the cabin is larger than outside, the air wants out. id you make a hole in the fuselage (by opening a door for example) all the air wants to escape via that hole very quickly, this can rip an airplane apart.
nothing
Almost always. Unless the airplane happens to be an ultralight, or the car happens to be a Hummer.