Why is Mach number used?

Related questions

1. What is the difference between calibrated airspeed and true airspeed?
2. How does headwind affect airspeed?
3. What affects true airspeed?
4. Does true airspeed increase with altitude?
5. How fast does an airplane go?
6. Is ground speed faster than airspeed?
7. What is true indicated airspeed?
8. What is Kcas speed?
9. What is airspeed sensor?
10. How does density altitude affect true airspeed?

Tags

1. #shocks
2. #aircraft
3. #other
4. #sound
5. #flight
6. #because
7. #fluids
8. #dynamics
9. #behave
10. #altitude
11. #similar
12. #barrier
13. #fluid
14. #breaking
15. #conditions
16. #number
17. #example
18. #temperature
19. #regardless