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Is it theoretically possible to travel faster than the speed of sound Mach 1 without making a sonic boom?
Ceefoo
Yes. That's what Mach numbers are all about. Mach numbers compare the sound of something moving through air to the speed of sound moving in that same air. Note that the speed of sound in air will vary a bit as the temperature, humidity and a couple of other things vary. In general, though, it's about 770 miles per hour (dry air at 20 °C (68 °F). A link is provided to the Wikipedia article on the speed of sound.
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∙ 15y ago
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