Machnumber

Machnumber
Mach number also mach number (mäk) n. Abbr. M
The ratio of the speed of an object to the speed of sound in the surrounding medium. For example, an aircraft moving twice as fast as the speed of sound is said to be traveling at Mach 2.
  [After Mach, Ernst.]

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Universalium. 2010.

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  • Machmeter — [ thumb|right|Illustration showing the face of a Machmeter reading a Mach number of 0.83] A Machmeter is an aircraft pitot static system flight instrument thatshows the ratio of the true airspeed to the speed of sound, a dimensionless quantity… …   Wikipedia

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