A girl is sitting near the open window of a train that ismoving at a velocity of 8m/s to the east. The girl's unclestands near the tracks and watches the train move away. Thelocomotive whisle emits sound at frequency 680 Hz. The air isstill. (Use 343m/s for speed of sound).
a. What frequency does the uncle hear?
b. What frequency does the girl hear?
c. A wind begins to blow from the east at 8m/s. What frequency does the uncle now hear?
d. What frequency does the girl now hear?