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21. The difference apparent frequency of a source of sound as perceived by an observer during its approach and recession is 2% of the natural frequency of the source. The velocity of the source is [Take speed of sound in air = 300 m/s] (1) 6 m/s (2) 3 m/s (3) 1.5 m/s (4) 12 m/s |
| Answer» 21. The difference apparent frequency of a source of sound as perceived by an observer during its approach and recession is 2% of the natural frequency of the source. The velocity of the source is [Take speed of sound in air = 300 m/s] (1) 6 m/s (2) 3 m/s (3) 1.5 m/s (4) 12 m/s | |