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Word: mach
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Meaning:
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.
- physics the Mach number
Source: Wiktionary
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Proper noun:
- Ernst Mach, Austrian physicist 1838 - 1916.
Source: Wiktionary
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