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Homework Help: 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.


    2. Relevant equations

    3. The attempt at a solution

    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


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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


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    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?

  6. Jan 19, 2016 #5


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    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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