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Old Feb 6, 2007 | 5:13 pm
  #2  
jimbo99
 
Join Date: Feb 2005
Location: Hsinchu (Taiwan), Saigon, London
Programs: EVA (diamond), A3, BMI, VN
Posts: 2,960
The speed of sound falls significantly with temperature. Down to 660mph at cruising altitude according to http://en.wikipedia.org/wiki/Speed_of_sound

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