cse • paper_1 • waves_oscillationscse-1988-subject-02-001
Waves — UPSC CSE 1988 Physics PYQ
Buy PYQ Solution Manual →Two express trains travelling at 10\text{ km/hour} are meeting each other while one of them is whistling. If the frequency of the note is 800\text{ Hz}, find the apparent pitch as heard by an observer in the other train after they passed each other. Velocity of sound in air = 340\text{ ms}^{-1}.
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