Test yourself: 5 hard theory questions, free Airspace, weather, regs and aerodynamics, FAA-style — instant score, every answer explained. No signup.
Free testmediumdistance-speed
The speed of sound decreases with:
A
Increasing altitude only
B
Decreasing temperature
C
Increasing pressure
D
Increasing humidity
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See where you stand: 5 hard questions, instant score, every answer explained.