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(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; the Mach number.

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Mach

The research paper reported that the experimental aircraft achieved Mach 1.5 under controlled conditions.

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The research paper reported that the experimental aircraft achieved Mach 1.5 under controlled conditions.

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