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What is mach 4 speed?
The speed of sound is around 760 miles per hour = Mach 1. So Mach 4 is 4*760 = 3040 mph.
How fast is Mach 9?
Mach 9 would be approximately 9 times the speed of sound, or 6,192 miles per hour.
Measure of speed at mach 1?
Mach number is a ratio of the speed of a body (aircraft) to the speed of sound in the undisturbed medium through which the body is traveling. It is said that the aircraft is flying at Mach 1 if its speed is equal to the speed of sound in air (which is 332 m/s or 1195 km/hr or 717 miles/hour.) An aircraft flying at Mach 2 is flying at twice the speed of sound in air, etc.Mach 1 = Speed of SoundSpeed of Sound = 332 m/s or 1195 km/hr or 717 miles/hour or 1,125 ft/s
How many miles per hour is mach 8?
Mach is not an absolute speed but a relative speed. The Mach value of an object is the ratio of the speed fo the object travelling through a medium to the speed of sound travelling through the same medium. Now sound travels faster in denser mediums so the speed of sound in [dense]air at sea level is greater than the speed of sound at high altitude. So Mach 2 in the air at sea level is faster than Mach 2 at high altitude. But Mach 2 under water is very much faster. However, most people are ignorant about the proper meaning of Mach and assume that it is simply related to the speed of sound at sea level at normal temperature/pressure/humidity - approximately 760 miles per hour. In that case Mach 8 would be 6080 mph.
How many kilometers per hour does 0.85 mach equal?
That depends upon the speed of sound through the medium in which the speed is being measured. mach = speed ÷ speed_of_sound_there ⇒ speed = mach x speed_of_sound_there In dry air at 20oC the speed of sound is [approx] 1236 km/h ⇒ speed_of_mach_0.85 = 0.85 x 1236 km/h ≈ 1051 km/h At 11,000m (where the air temperature is about -50oC) the speed of sound is approx 86% of that in air at 20oC, that is about 1063 km/h ⇒ speed_of_mach_0.85 ≈ 0.85 x 1063 km/h ≈ 904 km/h
