Birdwatch Archive

Birdwatch Note Rating

2024-12-24 00:15:13 UTC - NOT_HELPFUL

Rated by Participant: 1D5097F8ED41FB307D573208C532CD46F135CF1AB22BB5BAC16FA49ADA762476
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Original Note:

In space (at 550 km orbit) Mach numbers don't make sense as a measurement because they are defined as the ratio of an object's speed to the local speed of sound - and sound cannot propagate in the vacuum of space since there is no medium for sound waves to travel through. https://en.wikipedia.org/wiki/Mach_number

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