Posted by
**Anonymous** on
.

A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 53 dB by an observer 11 km away.

(a) What is the average power generated by the horn?

Wednesday

March 29, 2017
Posted by
**Anonymous** on
.

A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 53 dB by an observer 11 km away.

(a) What is the average power generated by the horn?

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