A train traveling east at a speed of 25.0 m/s moving directlyawayfrom a stationary observer. a strong, steady wind of 20.0 m/sisblowing from east to west. At a distance of 50.0 meters awayfromthe observer, the train's whistle is blown and the observerhears afrequency of 500.0 Hz at an intensity level of 90.0dB.
a) what whistle frequency is heard by a passenger traveling onthetrain?
b) when 250 m away from the observer, the train's whistle isblownagain. calculate the sound intensity ( in decibels) heard bytheobserver.
c) during 10.0 seconds how many Joules of sound-wave energy doesthewhistle transfer into the air?
d) due to the wind, the frequency heard by the observer is (greaterthan, less than, the same as) the frequency she would hearif therewas no wind. explain the answer.
A train traveling east at a speed of 25.0 m/s moving directlyawayfrom a stationary observer. a strong, steady wind of 20.0 m/sisblowing from east to west. At a distance of 50.0 meters awayfromthe observer, the train's whistle is blown and the observerhears afrequency of 500.0 Hz at an intensity level of 90.0dB.
a) what whistle frequency is heard by a passenger traveling onthetrain?
b) when 250 m away from the observer, the train's whistle isblownagain. calculate the sound intensity ( in decibels) heard bytheobserver.
c) during 10.0 seconds how many Joules of sound-wave energy doesthewhistle transfer into the air?
d) due to the wind, the frequency heard by the observer is (greaterthan, less than, the same as) the frequency she would hearif therewas no wind. explain the answer.
