Friday
October 31, 2014

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

A train sounds its horn as it approaches an inters - A train sounds its horn as ...
physics - A train sounds its horn as it approaches an intersection. The horn can...
Physics URGENT!!! - A train sounds its horn as it approaches an intersection. ...
Physics URGENT!!! - A train sounds its horn as it approaches an intersection. ...
physics - A train moving with a speed of 31.8 m/s sounds a 136-Hz horn. Suppose ...
physics - I need help with this question. A commuter train blows its horn as it ...
Physics!! - A car moving at 16.0 m/s, passes an observer while its horn is ...
Physics - Richard stands on the flatbed car of a moving train playing an a on ...
DrBob222 - A car moving at 16.0 m/s, passes an observer while its horn is ...
physics - 1)As a sound source moves away from a stationary observer, the number ...

Search
Members