Sound WavesHard
Question
A train moves towards a stationary observer with speed 34 m/s. The train sounds a whistle and its frequency registered by the observer is f1. If the trains′s speed is reduced to 17 m/s, the frequency registered is f2 If the speed of sound is 340 m/s then the ratio f1 / f2 is
Options
A.18/19
B.1/2
C.2
D.19/18
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