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What does an airplane's Mach number compare?

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  1. Its speed compared with the speed of sound
  2. Its height compared with sea level
  3. Its weight compared with its lift

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References

  1. Mach Number, NASA Glenn Beginner's Guide to Aeronautics www.grc.nasa.gov/www/k-12/airplane/mach.html Checked 2026-10-10.
  2. Mach Number, NASA Glenn Beginner's Guide to Aeronautics www.grc.nasa.gov/www/k-12/airplane/mach.html Checked 2026-10-10.

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