8. What is mach number and it's significance.

Question

Accepted Answer

Mach number is the ratio of an object's speed to the speed of sound in the surrounding medium.

It is named after Austrian physicist Ernst Mach.
It is used to describe the speed of an object in relation to the speed of sound.
Mach 1 is the speed of sound, so anything traveling at Mach 1 is traveling at the speed of sound.
Supersonic aircraft have a Mach number greater than 1.
Hypersonic aircraft have a Mach number greater than 5.
Mach number is important in aerodynamics and the design of aircraft.
It is also used in the study of fluid dynamics and the behavior of gases.
Mach number can affect the performance and safety of aircraft.
The speed of sound varies with temperature and altitude, so Mach number is not a constant value.

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