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Homework Help: Please help Speed of sound in air/temperature relation

  1. Oct 28, 2013 #1


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    1. The problem statement, all variables and given/known data

    The density of a sample of air is 1.211 kg/m3, and the bulk modulus is 1.42 · 105 N/m2.

    a) Find the speed of sound in the air sample.

    b)Find the temperature of the air sample. Give answer in °C.

    2. Relevant equations

    3. The attempt at a solution

    I found the part a it's
    It's 342.43 m/s
    But i find b wrong everytime.What i use is; sqrt[(1.4 x r x T)/M] = speed
    But maybe i know the some values wrong? Help please.
  2. jcsd
  3. Oct 28, 2013 #2


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    Staff Emeritus
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    Homework Helper

    In the calculation, T must be an absolute temperature.

    If you show your calculations, it might help us pinpoint what is going wrong.
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