cse • paper_1 • waves_oscillationscse-2004-subject-02-002
Beats — UPSC CSE 2004 Physics PYQ
Buy PYQ Solution Manual →A siren of frequency 900 Hz is going towards a wall away from an observer at a speed 10 m/sec. Determine : (i) Frequency of sound directly heard from the siren. (ii) Frequency of sound reflected from the wall. (iii) Number of beats per second heard by the observer. (Velocity of sound = 330 m/sec)
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