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A train standing at the outer signal of a railway station blows a whistle of frequency 400 Hz still air. The train begins to move with a speed of `10ms^(-1)` towards the platform. What is the frequency of the sound for and observer standing on the platform? (sound velocity in air `330 ms^(-1))`

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To solve the problem, we will use the formula for the apparent frequency of a sound when the source is moving towards a stationary observer. The formula is given by: \[ f' = \frac{V + V_o}{V - V_s} \cdot f \] Where: - \( f' \) = apparent frequency ...
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