Clue: Speed-of-sound ratio

We have 2 answers for the clue Speed-of-sound ratio. See the results below.


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Last Seen In:

  • New York Times - September 16, 2015
  • USA Today - December 22, 2014
  • Washington Post - September 03, 2014
  • King Syndicate - Premier Sunday - September 08, 2013
  • LA Times - December 20, 2012
  • Chicago Reader - August 27, 2010
  • LA Times - March 16, 2009
  • USA Today - June 04, 2008

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