The solar systemβSome unsolved problems
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G.F.S.
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Article
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1926
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Elsevier Science
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English
β 123 KB
UNDER-WATER ACOUSTICS. 635 waves are about a thousand times as long as the diameters of the molecules which scatter them: Under water a lead shot is a conductor and an air cavity a reflector of sound. The exploration of under-water waves, particularly in the case of obstacles small in comparison w