Mach 1 is the speed of sound, which is 343 meters per second, or 343 m/s. Mach 8 is 8 times faster than the speed of sound .
8 X 343 2,744 m/s or 2.74 km/s
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.
0,72 Mach is a subsonic speed. Mach number = speed of an object/speed of sound The speed of sound in dry air at 20 0C is 1 236 km/h.
That means the speed, compared to the speed of sound. For example, "mach 2" means twice the speed of sound.
Mach 1 is the speed of sound. 768 miles per hr. Mach 2 is twice that & so on.
Mach 0.8 = about 593.2 mph
It means 8 times the speed of sound. Something travelling at 8 times the local speed of sound is said to be traveling at mach 8
Maximum speed: Mach 0.96Operating speed: Mach 0.89
The mach number is the speed, compared to the speed of sound in air. Thus, mach 1 is the speed of sound, mach 2 is twice (2 times) the speed of sound, mach 3 is 3 times the speed of sound, etc.
The "Mach number" is the speed of the aircraft as a percentage of the speed of sound. So an aircraft going at Mach 0.74 is traveling at 74% of the speed of sound. (Mach 0.74 is a typical airliner speed.)
Mach 2.
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.
the Mach number
Mach refers to the speed of sound, for example, mach 1, equals the speed of sound, mach 2, the speed of sound times 2. So, mach 25 would mean, 25 times the speed of sound.
0,72 Mach is a subsonic speed. Mach number = speed of an object/speed of sound The speed of sound in dry air at 20 0C is 1 236 km/h.
Mach is the coefficient of the speed of sound, so Mach 1 means you are travelling at 1 x the speed of sound.
That means the speed, compared to the speed of sound. For example, "mach 2" means twice the speed of sound.
Answer Mach 12 Supersonic Speed usually refers to speed just above Mach 1, or as high as Mach 3. Hyper-speed is a higher range but there is no set definition.