Mach 0.8 = about 593.2 mph
16680 mph or the reentry speed of the space shuttle to our atmoshere.
The speed of sound is around 760 miles per hour = Mach 1. So Mach 4 is 4*760 = 3040 mph.
The speed of sound (and hence the Mach number) depends on the nature and density of the fluid through which the sound travels. Generally, though Mach 1 (in air, at sea level, and at 15 deg C) is approx 760 mph. So Mach 9 would be 6840 mph.
Mach 6 is about 4,449.3 mph
Mach 3.5 is about 2,595.4 mph
Mach is a measure of speed based on the speed of sound at sea level. Mach 1 = 642 MPH . Mach 2 = 2 x 642 MPH or 1284 MPH.
That all depends on the altitude the mach speed is occurring at. Mach 1 is defined as the speed of sound which is a function of fluid density. In air at sea level and normal temperature, 0.85 mach = ~647 mph 0.85mach ~.(0.85*330)mph
The Mach number for speed is a function of how fast an object is going relative to the speed of sound in that medium (which can vary). The speed of sound at sea level is around 768 mph, so Mach 3.3 at around this level will be 768 x 3.3 = 2534 mph
Maximum speed is 634 mph. Maximum cruise speed is 587 mph. max cruising speed = .85 MACH max design speed = .96 MACH
Mach is a unit of speed based on the speed of sound (which varies with altitude and pressure). Mach 1 is the speed of sound, 340.29 m/sec or about 761.2 mph at sea level. Mach 2.5 would be 2.5 times as fast, or about 1900 mph.
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 would be the speed of the object (760 mph) divided by the speed of sound (760 mph) = 1Mach 20 would be 20 times the speed of sound (760 mph) = 15,200 mph.It is absurd to think that the government just lost an aircraft flying at the speed of 700 billion mph!
Mach is a unit of speed based on the speed of sound (which varies with altitude and pressure). Mach 1 is the speed of sound, 340.29 m/sec or about 761.2 mph at sea level. Mach 2.5 would be 2.5 times as fast, or about 1900 mph.
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
Maximum speed: Mach 2.04 (≈1,354 mph, 2,179 km/h) at cruise altitudeCruise speed: Mach 2.02 (≈1,340 mph, 2,158 km/h) at cruise altitude
about 1.7 mach without afterburners with afterburners 1,317 mph over 2 mach (1 mach speed of sound about 680 mph
16680 mph or the reentry speed of the space shuttle to our atmoshere.
Mach 0.82 equates to about 624.2 mph