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Rarefaction waves (math.)[edit]

Mathematically speaking, rarefaction waves can refer to diverging 'characteristics'. Although the 'density' of characteristics in the space considered may be decreasing, the actual density (mass/volume) of the underlying physical system described by the characteristics could be doing anything at all. See Method of characteristics. — DIV 05:34, 5 February 2007 (UTC)

Rarefaction (History)[edit]

Content needed as to the theory of rarefaction, explaining the void or vacuum in a torrecielli tube by 17th century scholars such as Boyle and Fransiscus Linus —Preceding unsigned comment added by (talk) 14:31, 13 March 2010 (UTC)

Rarefied coastline?[edit]

Say what a rarefied coastline is. Jidanni (talk) 00:27, 22 November 2015 (UTC)