Question: Question 13 (6 points) A train approaching a crossing sounds its horn with a frequency of 950 Hz. An observer standing at a distance down

Question 13 (6 points) A train approaching a crossing sounds its horn with a frequency of 950 Hz. An observer standing at a distance down the tracks measures the frequency of the whistle to be 875 Hz as the train moves away from her. a. If the air temperature is 17.10 C, calculate the speed of the sound in the air. (2) b. Calculate the speed of the train. (4)

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