Physics-
General
Easy

Question

The temperature at which the speed of sound in air becomes double of its value at 0 ℃ is

  1. 273 K    
  2. 546 K    
  3. 1092 K    
  4. 0 K    

The correct answer is: 1092 K


    v proportional to square root of T rightwards double arrow square root of fraction numerator T subscript 2 end subscript over denominator T subscript 1 end subscript end fraction end root equals fraction numerator v subscript 2 end subscript over denominator v subscript 1 end subscript end fraction rightwards double arrow T subscript 2 end subscript equals T subscript 1 end subscript open parentheses fraction numerator v subscript 2 end subscript over denominator v subscript 1 end subscript end fraction close parentheses to the power of 2 end exponent
    rightwards double arrow T subscript 2 end subscript equals 273 cross times 4 equals 1092 K

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