A thin-walled plastic bottle is sealed at an altitude of 19,000 feet. What would happen to this bottle if it is carried down to 1,000 feet?

At 19,000 feet, the air pressure inside the sealed bottle is relatively low. As the bottle is carried down to 1,000 feet, the air pressure outside increases and pushes inward more strongly than the air inside pushes outward. The thin-walled bottle will shrink and collapse.

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