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Why is an airplane pressurized?

Answer 1

William Audy

Because air pressure at high altitudes (#10,000+m#) would make us pass out.

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Answer 2

Nora Arzate

An airplane is pressurized to maintain a safe and comfortable environment for passengers and crew at high altitudes where the air pressure is significantly lower than at sea level. Without pressurization, passengers and crew would experience hypoxia (lack of oxygen), which can lead to symptoms such as dizziness, nausea, and even loss of consciousness. Pressurization also helps prevent structural damage to the aircraft by maintaining a pressure difference between the inside and outside of the cabin, which reduces stress on the fuselage and ensures structural integrity during flight. Additionally, pressurization helps regulate temperature and humidity levels inside the cabin for the comfort of passengers and crew.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.