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The decibel level of the noise from a jet aircraft is 130 dB when measured 17.5...

The decibel level of the noise from a jet aircraft is 130 dB when measured 17.5 m from the aircraft.

(a) How much sound power does the jet aircraft emit?
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(b) How much sound power would strike the eardrum of an airport worker 17.5 m from the aircraft? (Use 1.9 ✕ 10-2 m as the diameter of the ear.)
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