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A 65.9-Hz sound wave is barely audible at a sound intensity level of 60.0 dB. The density of air at 20.0C is 1.20 kg/m3. Speed

A 65.9-Hz sound wave is barely audible at a sound intensity level of 60.0 dB. The density of air at 20.0C is 1.20 kg/m3. Speed of sound in air at 20.0C is 343 m/s. What is the displacement amplitude of a 65.9-Hz sound wave

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