Correction for the speed of The Speed of Sound
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How fast is 7.74360 kilometers per second?
It's about twenty times as fast as The Speed of Sound
The speed of The Speed of Sound is about 0.3430 kilometers per second.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 0.3430 kilometers per second. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 1.50 kilometers per second to 1.560 kilometers per second in water, depending on its salinity.