Physics-
General
Easy

Question

Two open organ pipes gives 4 beats/sec when sounded together in their fundamental nodes. If the length of the pipe are 100 blank c m and 102.5 blank c m respectively, then the velocity of sound is :

  1. 496 m/s    
  2. 328 m/s    
  3. 240 m/s    
  4. 160 m/s    

The correct answer is: 328 m/s


    increment n equals n subscript 1 end subscript minus n subscript 2 end subscript rightwards double arrow 4 equals fraction numerator v over denominator 2 l subscript 1 end subscript end fraction minus fraction numerator v over denominator 2 l subscript 2 end subscript end fraction equals fraction numerator v over denominator 2 end fraction open square brackets fraction numerator 1 over denominator 1.00 end fraction minus fraction numerator 1 over denominator 1.025 end fraction close square brackets
    rightwards double arrow 8 equals v open square brackets 1 minus 0.975 close square brackets rightwards double arrow v equals fraction numerator 8 over denominator 0.025 end fraction almost equal to 328 blank m divided by s

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