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mach number

Babylon English English dictionary

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mach number
n. number which shows the speed of an object in relation to the speed of sound

Wikipedia English The Free Encyclopedia

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Mach number
In fluid mechanics, Mach number (M or Ma) is a dimensionless quantity representing the ratio of speed of an object moving through a fluid and the local speed of sound.

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WordNet 2.0 Dictionary

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Mach number

Noun
1. the ratio of the speed of a moving body to the speed of sound
(hypernym) ratio


BTS Transportation Expressions Dictionary

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Mach Number
The ratio of true airspeed to the speed of sound. (14CFR1) (FAA4)

FAA Pilot/Controller Glossary

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MACH NUMBER
The ratio of true airspeed to the speed of sound; e.g., MACH .82, MACH 1.6.
(See AIRSPEED.)
 

Source: U.S. Department of Transportation, Federal Aviation Administration (FAA).

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