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A snooker ball must be 5.175 cm in diameter to within an uncertainty of 0.127 mm. The Earth is 6371 km in radius and its

A snooker ball must be 5.175 cm in diameter to within an uncertainty of ±0.127 mm. The Earth is 6371 km in radius and its highest mountain above sea level, Mount Everest, is 8848 m. Which is smoother, a snooker ball or the Earth? [Note: do we know everything to the same level of accuracy?]

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