The noise level in an empty examination hall

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Reference no: EM13565703

The noise level in an empty examination hall is 40 dB. When 100physics students are writing an exam, the sounds of heavy breathingand pens traveling rapidly over paper cause the noise level to riseto 63 dB (not counting the occasional groans). Assuming that each student contributes an equal amount of noise power, find the noise level when half of the students have left the examination hall. Do not enter the unit.

Reference no: EM13565703

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