The question is incomplete. It states: "19. The height at which the atmosphere ceases to exist is about 80km. if the atmospheric pressure at a height of 20km above the ground level is".
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ScanSolve AI Answer
The question is incomplete. It states: "19. The height at which the atmosphere ceases to exist is about 80km. if the atmospheric pressure at a height of 20km above the ground level is".
To solve this problem, I need to know what is being asked about the atmospheric pressure at $20 \text{ km}$ (e.g., its value, or how it compares to another pressure). Please provide the complete question.
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