# How Fast Is Mach?

Mach is something used to measure the speed of sound by the different pressures of the air and the temperature. At sea level mach is 761.2 mph.
Q&A Related to "How Fast Is Mach"
 As temperature increases so does the speed of sound. A mean number for the speed of sound is 1,320 feet per second. This can vary due to weather conditions since sound rides on a http://answers.ask.com/Reference/Physics/how_fast_...
 Mach 20= 15,200 miles per hour. Mach numbers are determined by the speed of the object divided by the speed of sound. The speed of sound is approx. 760 miles/hour - a Mach 1 number http://wiki.answers.com/Q/How_fast_is_mach_20
 Since the speed of sound through the standard atmosphere is 761 mph (1,223 km/h) at sea level, http://www.chacha.com/question/how-fast-is-mach-2
 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...
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