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The rec.puzzles Hall of Fame is a compilation of over 500 of the most popular puzzles that have been posted and discussed in the rec.puzzles newsgroup. In most cases a detailed solution has been provided.

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Categories : physics : spheres.p

Two spheres are the same size and weight, but one is hollow.  They are
each made of uniform material, though of course not the same material.
With a minimum of apparatus, how can I tell which is hollow?

Solution

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