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Mach (view source)

Revision as of 22:22, July 30, 2009

486 bytes added ,  22:22, July 30, 2009
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'''Mach''' [number] is the number of times faster than the speed of sound that an object travels.

For example, '''Mach''' 3 is the speed three times faster than the speed of sound, which was achieved by the [[SR-71 Blackbird]].

Rockets commonly attain speeds faster than the speed of sound. Ordinary passenger airplanes do not. A "sonic boom" similar to thunder can be heard when an object "breaks the sound barrier" and travels faster than the speed of sound.
[[category:military]]
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