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Pendulum clock at altitude (figure inconsistent): A beat-seconds pendulum that keeps correct time at sea level loses 27 s per day at the top of a mountain. Using the given Earth radius (stated as 600 km), estimate the mountain height above sea level.

Difficulty: Medium

500 metres
1000 metres
1500 metres
2000 metres
25000 metres

Correct Answer: 2000 metres

Explanation:

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