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Speed Of Sound Ratio Crossword Clue

There is 1 exact and 78 possible answers.
We've checked our database and believe the answer is MACH which was last seen in the New York Times crossword.
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We think the answer to this crossword clue is: MACH

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99%4Exact Match!
noun

• Austrian physicist and philosopher who introduced the Mach number and who founded logical positivism (1838-1916)

38%5Ratio of speed to the speed of sound
noun

• Austrian physicist and philosopher who introduced the Mach number and who founded logical positivism (1838-1916)

32%11 Index of ______, the ratio of the speed of light in a vacuum to its speed in a given substance
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Source #Number Answer
New York Times16 Sep 2015 Across 5
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