Correction for the speed of The Speed of Sound
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How fast is 9 centimeters per minute?
It's about one-two-hundred-fifty-thousandth as fast as The Speed of Sound
The speed of The Speed of Sound is about 2,060,000 centimeters per minute.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 2,060,000 centimeters per minute. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 8,980,000 centimeters per minute to 9,360,000 centimeters per minute in water, depending on its salinity.