A train traveling east at a speed of 25.0 m/s moving directly awayfrom a stationary observer. a strong, steady wind of 20.0 m/s isblowing from east to west. At a distance of 50.0 meters away fromthe observer, the train's whistle is blown and the observer hears afrequency of 500.0 Hz at an intensity level of 90.0 dB.
a) what whistle frequency is heard by a passenger traveling on the train?
b) when 250 m away from the observer, the train's whistle is blownagain. calculate the sound intensity ( in decibels) heard by theobserver.
c) during 10.0 seconds how many Joules of sound-wave energy doesthe whistle transfer into the air?
d) due to the wind, the frequency heard by the observer is (greater than, less than, the same as) the frequency she would hearif there was no wind. explain the answer.