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A microphone of cross-sectional area 0.80cm2 is placed in front of a small speaker emitting 3.0W of sound output. If the distance between the microphone and the speaker is 2m, how much energy falls on the microphone in 5.0s? |
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Answer» A microphone of cross-sectional area 0.80cm2 is placed in front of a small speaker emitting 3.0W of sound output. If the distance between the microphone and the speaker is 2m, how much energy falls on the microphone in 5.0s? |
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