A train is moving on a straight track with speed 20 m/s. It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing

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A train is moving on a straight track with speed 20 m/s. It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing
08
Nov
A train is moving on a straight track with speed 20 m/s. It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing A train is moving on a straight track with speed 20 m/s. It is blowing its whistle at the frequency of [...]
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