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mach number
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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 | Download this dictionary |
Mach number
In fluid mechanics, Mach number (
or 
) (generally , sometimes or ) is a dimensionless number representing the speed of an object moving through air or other fluid divided by the local speed of sound. It is commonly used to represent the speed of an object when it is traveling close to or above the speed of sound.
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| WordNet 2.0 Dictionary | Download this dictionary |
Mach number
Noun
1. the ratio of the speed of a moving body to the speed of sound
(hypernym) ratio
| BTS Transportation Expressions Dictionary | Download this dictionary |
Mach Number
| FAA Pilot/Controller Glossary | Download this dictionary |
MACH NUMBER
The ratio of true airspeed to the speed of sound; e.g., MACH .82, MACH 1.6.
(See AIRSPEED.)
(See AIRSPEED.)
Source: U.S. Department of Transportation, Federal Aviation Administration (FAA).
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