Mach
- Proper noun. Ernst Mach, Austrian physicist 1838 - 1916.
- Noun. (physics) a ratio of the speed (of an object, etc.) to the speed of sound in the fluid or other medium through which the object travels. Usually used to describe supersonic speeds.
- Noun. (physics) the Mach number.
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This entry was last updated on RefTopia from its source on 3/20/2012.