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12 February, 18:35

What is the speed of sound in air at 40°C?

355 m/s

307 m/s

331 m/s

239 m/s

+2
Answers (2)
  1. 12 February, 18:36
    0
    This is not a good answer, because some one t o forgot to tell us the important temperature, and the given atmospheric pressure "at sea level" makes really no sense. In SI units with dry air at 20°C (68°F), the speed of sound c is 343 meters per second (m/s).
  2. 12 February, 18:38
    0
    the answer is 355 m/s
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