Question

4. In one of the original Doppler experiments, a tuba was played on a train at a speed of 60 km/h, at a constant frequency of 75 Hz, while a second identical tuba played the same note on the platiorm at the railway station. Assume the observer is standing still on the platiorm on a day when the outside air temperature is 20° C a. What is the effect that is observed regardless of any sound from the tuba at the station? b. Calculate the pitch that the observer hears when the train is approaching the platform. c. What does the observer hear as a result of both tubas playing the same note? (Explain) d. Calculate the pitch that the observer "hears" due to sounds coming from both instruments.

Answer 1

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