In mph how fast is Mach 0.785?

Answer 1

Mach 0.82 equates to about 624.2 mph

Answer 2

The speed of sound varies depending on many factors. It is roughly 768 mph in dry air. Mach 1 is this speed under same conditions. So, .785 Mach would be 768 times 0.785, or 78.5% of 768 miles and hour. Roughly 603 mph at ground level in dry air and STP.

Answer 3

The speed of sound is different at various altitudes.

At sea level altitude, i.e. right beside any beach, Mach 0.7 is 563 mph.

At an altitude of 35,000 ft, which is a typical cruise altitude of a Boeing 747, Mach 0.7 is equivalent to 463 mph.

Answer 4

Just subsonic in air.

Perhaps at 630 mph.

Mach = Velocity/Velocity of sound in medium

Answer 5

Mach 0.885 = about 656.3 mph

Answer 6

Mach 0.77 is 586.13 mph

Answer 7

Mach 0.81 = 992.3 km/h

Answer 8

7.65 MPH= Mach 0.01

Answer 9

Mach 0.72 is about 552.4 mph