Multiple Choice
While enjoyable,rock concerts can be damaging to one's hearing.If you are sitting in the front row of a rock concert 5 m from the speaker system,and the sound intensity is 120 dB,how far back would you have to be such that the sound intensity drops below the recommended safe level of 90 dB?
A) 7 m
B) 9 m
C) 90 m
D) 100 m
E) 160 m
Correct Answer:

Verified
Correct Answer:
Verified
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