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Sound problem

  1. Jun 24, 2008 #1
    1. The problem statement, all variables and given/known data
    A metal tube with length 931m is hit with a hammer. On the other end two sounds with time delay of 2.5 seconds can be heard. What is the reason for this? What is the speed of sound in the metal?

    2. Relevant equations

    3. The attempt at a solution
    I think the solution is quite simple, I'm just not sure if it is correct. The two sounds which can be heard are two waves - one which travels through the metal, the other through air inside. The speed of sound in the metal can be determined from this equation:
    L/v1-L/v2=2,5s. (v1 is the speed in air, v2 in the metal)
  2. jcsd
  3. Jun 24, 2008 #2


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    I'd say you were correct.
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