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"
Mach 1 is the speed of sound, which varies by the air's pressure and temperature. Mach 1 at sea level is 340.3 m/s, 761.2 mi/h, 1,225 km/h
http://wiki.answers.com/Q/How_Fast_is_a_Mach
If an object is going over mach 1, it is going faster than the speed of sound. At mach 5, an object would be going about 3,847 miles per hour! You can find more information here:
http://www.ask.com/web-answers/Reference/Other/how...
In the Trophosphere, Mach 1 is 799.5 mph, Mach 2 is 1599 mph, and M...
http://www.chacha.com/question/how-fast-is-mach-1%...
Mach 1 is the speed of sound, which is 332 m/s or 1195 km/hr or 717 miles/hour. Mach numbers are named after an Austrian philosopher, Ernst Mach (1838-1916).
http://www.kgbanswers.com/how-fast-is-mach-1/42235...
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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