Machine-translated by Google. Questions are authored in English.
Top

Discussion

The speed of sound in a perfect gas depends on

  • A.The velocity of the body moving through it
  • B.The density of the gas alone
  • C.The absolute temperature of the gas
  • D.The absolute pressure of the gas alone

Answer: C

It equals the square root of gamma times R times T, so for a given gas it is fixed entirely by temperature. Since temperature falls with altitude through the troposphere, the speed of sound falls too and a given true airspeed corresponds to a higher Mach number.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.