PRC Engineering Practice Test & Exam Prep | Philippines

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If the ambient temperature at a specific flight altitude is -40 degrees Celsius, what is the speed of sound at this altitude? (Assume air behaves as a perfect gas with gamma = 1.4 and R = 287 J/kg*K)

Approximately 340.3 m/s Approximately 306.0 m/s Approximately 243.2 m/s Approximately 150.0 m/s

Correct Answer:

Approximately 306.0 m/s

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