Ok, let's figure this one out: Assume mach speed is 1,010 feet per second, we could travel 689 miles in one hour. (1010 ft * 60sec *60min) / 5,280 ft = 689 mph rounded. Therefore, 0.81 of mach should be 558.09 mph
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Mach 2.34 is equal to 2445 KM/HR or 1548 MPH.
mach 1 = 761.207 mph, so 761.207 * 0.791 = 602.115 mph
Mach 1 is 761.21 mph.Use this equation to convert Mach to miles per hour: mach x 761.21 = mph
If you are traveling 2 miles an hour, then 1 hour.
At a temperature of 15 degrees Celsius, the speed of sound is 340.3 m/s (1225 km/h, or 761.2 mph, or 661.5 knots, or 1116 ft/s) in the Earth's atmosphere.Therefore, Mach 0.77 at 15 degrees is equal to 0.77 x 761.2 = 586.124 miles per hour at this temperature.