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physics

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The human eardrum has an area of 5.0×10–5 m2. (a) What is the sound power received when the incident intensity is the minimum perceivable, 1.0×10–12 W/m2? (b) What is the sound power at the eardrum for conversational speech, which has a sound level of 65 dB? (c) What is the sound power at the threshold of pain, 140 dB? answer to all parts in Watts pls. thanks

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