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486.180 meters per second is about one-and-two-fifths times as fast as The Speed of Sound
In other words, it's 1.42 times the speed of The Speed of Sound, and the speed of The Speed of Sound is 0.704 times that amount.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 343 meters per second. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 1,497 m/s to 1,560 m/s in water, depending on its salinity.
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