Basic: Mach is a measurement of the speed of sound in air. Therefore, mach6 is six times the speed of sound in air.
761.2 * 6 = 4,567.2 mile/hour (mph)
More in depth:
"Mach" is a relative measurement of speed and fluid temperature.
Here are some examples of Mach 6:
CAS = Calibrated Air Speed. The speed which a instrument in the plane would show.
TAS = True Air Speed. The actual speed of the object relative to the medium it is traveling in.
5100.087 MPH 8207.795 KMPH 4431.885 Knots
19223.5632
9.8 Mach
about 5100 mph
Mach 3.6 = 2,740.34 mph
Mach 10 = about 7,606 miles per hour.
This is the rough formula. Mach = velocity/speed of sound This is rough because conditions are truly variable, but............ 79 Mach = velocity/768 mph = ~606070 miles per hour
Mach 0.8-1.0
Mach 889 is about 659,233 mph
Mach 1.7 is equal to about 1294 mph.
645.38104_MPH_">645.38104 MPH-is 0.87 Mach -
Mach 6 is about 4,449.3 mph
Mach 1 is about 762 mph, so mach 20 is about 15,240mph.
Machnesium (element #67).
the SR 71 goes really fast it goes Mach 7 NOT Mach 3.
Mach 3.3 is about 2,512 mph depending on altitude.
mach 2.03
9.8 Mach
Mach 10+