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Speed of sound in air

  1. Jan 19, 2016 #1
    1. The problem statement, all variables and given/known data
    A student stands 86m from the foot of a cliff, claps her hands, and hears the echo 0.50s later. Calculate speed of sound in air.

    Known
    •86m
    •0.50s

    2. Relevant equations
    V=331.4+0.606T

    3. The attempt at a solution
    V=d/t
    V=86m/0.50s
    V=172m/s

    Is that the first step to the problem? If so I'm not quite sure what the next step is.
     
  2. jcsd
  3. Jan 19, 2016 #2

    Samy_A

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    What is the total distance the sound has to travel between the moment she claps her hand and the moment she hears the echo?
     
  4. Jan 19, 2016 #3
    Your formula is correct, but the value of the distance you used isn't.
     
  5. Jan 19, 2016 #4
    86m x 2 = 172 bc it is an echo?

    V=d/t
    V=172m/0.50s
    V=344m/s
     
  6. Jan 19, 2016 #5
    That seems to be correct - about 340 m/s is a typical value for the speed of sound of air at atmospherical conditions. I also think that this is the only step of the calculation (at least according to the statement).
     
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