a) A high speed train is traveling at a speed of 48 m/s when the engineer sounds the 411 Hz warning horn. The speed of sound is 340m/s. What is the frequency of the sound as perceived with a person standing on at the crossing when the train is approaching?
b) What is the wavelength of the sound because perceived by a person standing on at the crossing when the train is approaching?
c) What is the wavelength of the sound as perceived by a person standing on at the crossing when the train is leaving?
d) What is the frequency of the sound as perceived by a person standing on at the crossing when the train is leaving?