How Fast Is Mach 1?

Answer

Based on the standard atmospheric model, Mach 1 is 761.2 miles per hour at sea level. The speed changes based on temperature and at altitude the temperature is lower than sea level. Based on this, the speed of Mach 1 is estimated at 660.1 miles per hour. You can find more information here: http://www.aerospaceweb.org/question/atmosphere/q0102c.shtml
Q&A Related to "How Fast Is Mach 1"
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1 Additional Answer
The speed of sound, or Mach 1 is: 761.2 MPH. When doing scientific calculations the speed actually changes slightly based on the altitude and temperature. You can find more information here: http://mcfisher.0catch.com/other/mach1/mach1d.htm
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