BABA66901 BABA66901

25-01-2024
Physics

contestada

The engine of a train moving with speed 10 ms⁻¹ towards a platform sounds a whistle at frequency 400 Hz. The frequency heard by a passenger inside the train is (neglect air speed. Speed of sound in air 330 ms⁻¹)
(1) 200Hz
(2) 400Hz
(3) 412 Hz
(4) 388 Hz

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