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To: mamelukesabre

They are claiming that 680 MPH IS the speed of sound at 120k ft. I’m not sure if that is correct or not. I know that the speed of sound is about 760 mph at sea level.

22 posted on 02/07/2012 11:39:43 AM PST by jaydubya2

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To: jaydubya2

The speed of sound is dependent on air temperature.

38 posted on 02/07/2012 12:12:44 PM PST by Jack Hydrazine (It's the end of the world as we know it and I feel fine!)

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