SOLUTION: The speed of sound in dry air at 20 degrees Celsius (68 degrees Fahrenheit) is 768 mph. Convert to feet per second.
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Question 1053161: The speed of sound in dry air at 20 degrees Celsius (68 degrees Fahrenheit) is 768 mph. Convert to feet per second.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
One mile per hour is 5280 feet per 3600 seconds. So 
. You can do your own arithmetic.
John
My calculator said it, I believe it, that settles it
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