Question

doppler effect train numerical ​

Answer 1

Answer:

Explanation:

Find the difference in apparent frequencies of the whistle for a stationary observer when the train moves towards and away from the observer with the speed 72 km/hr. The speed of sound in air is 340 m/s. Given: Actual frequency of the note = 640 Hz, Speed of listener VL =0, Velocity of sound in air = v = 340 m/s.The Doppler effect is not all theoretical though. We can use the Doppler effect equation to calculate both the velocity of the source and observer, the original frequency of the sound waves and the observed frequency of the sound waves.