then the ratio f1/f2 is

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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 speed of the train is reduced to 17 m/s, the frequency registered is f2 . If speed of sound is 340 m/s, then the ratio f1/f2 is
07
Nov
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 speed of the train is reduced to 17 m/s, the frequency registered is f2 . If speed of sound is 340 m/s, then the ratio f1/f2 is [...]
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Tags: 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 speed of the train is reduced to 17 m/s , the frequency registered is f2 . If speed of sound is 340 m/s , then the ratio f1/f2 is ,