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Discussion

Air density in the standard atmosphere

  • A.Is independent of both pressure and temperature
  • B.Decreases with increasing altitude
  • C.Increases with increasing altitude
  • D.Remains constant at all altitudes

Answer: B

Both pressure and density fall with height, which is why the same true airspeed produces less dynamic pressure and less lift as an aircraft climbs. The equation of state ties density to pressure and temperature together.

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