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7) if the speed of sound in air is 1125 ft/sec at 20 C what is it at 35C in ft/sec? Answer: 8) what

7) if the speed of sound in air is 1125 ft/sec at 20 C what is it at 35C in ft/sec? Answer: 8) what is the condensation of an acoustic plane wave in air if it's SPL is 140 dB re 20 microPa? Answer: 9) is the small perturbation assumption valid for the acoustic wave in (8). If not why not? Answer:

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