Thursday
May 28, 2015

Homework Help: Physics

Posted by Jake on Monday, December 13, 2010 at 2:22pm.

A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 42 dB by an observer 10 km away.
(a) What is the average power generated by the horn?
W
(b) What intensity level of the horn's sound is observed by someone waiting at an intersection 53 m from the train? (Treat the horn as a point source and neglect any absorption of sound by the air.)
2dB

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Members