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    				| 1. | A violin string emits sound of frequency 510 Hz.How far will the sound waves reach when stringcompletes 250 vibrations? The velocity of sound is340 m/s.(Ans : 166.7 m)O. | 
| Answer» f=510Hztime required for 250 vibrations=250/510velocity of sound is 340m/sdistance travelled=340×250/510=166.7m | |