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A sound detector is placed on a railway ...

A sound detector is placed on a railway platform. A train, approaching the platform at a speed of `36 kmh^-1`, sounds irts whistle. The detector detects 12.0 kHz s the most dominant frequency in the whistle. If the trasin stops at the platform and sounds the whistle, what would be the most dominant frequency detected? The speed of sound in air is `340 ms^1`.

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A sound detector is placed on a railway platform. A train, approaching the platform at a speed of 36 kmh^-1 , sounds its whistle. The detector detects 12.0 kHz is the most dominant frequency in the whistle. If the train stops at the platform and sounds the whistle, what would be the most dominant frequency detected? The speed of sound in air is 340 ms^1 .

A sound detector is placed on a railway platform. A train, approaching the platform at a speed of 36 kmh^-1 , sounds its whistle. The detector detects 12.0 kHz is the most dominant frequency in the whistle. If the train stops at the platform and sounds the whistle, what would be the most dominant frequency detected? The speed of sound in air is 340 ms^-1 .

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A train approaching a platform at a speed of 54 km h^-1 sounds a whistle. An observer on the platform finds its frequency to be 1620 Hz. The train passes the platform keeping the whistle on and without slowing down. What frequency will the observer hear after the train has crossed the platfrom ? The speed of sound in air = 332 ms^-1

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