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I must find the depth of the well. (Waves)

  1. Feb 8, 2009 #1
    1. The problem statement, all variables and given/known data
    A stone is dropped into a well. The splash is heard 3 seconds later. What is the depth of the well?


    2. Relevant equations
    the change in t= change in length/ velocity of sound


    3. The attempt at a solution
    V= 343 m/s which is the speed of sound

    Ok I solved for depth. I made L=d. Then my equation looked like this. D= t * v

    D= (3s) * 343 m/s = 1029 meters

    The answer is 41 meters if you round off. I've seen solutions to this problem, but I need a walkthrough as to how to do it because I don't understand how the experts on cramster solved this problem.
     
  2. jcsd
  3. Feb 8, 2009 #2

    Redbelly98

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    You need to also consider how long it takes the falling stone to reach the water.

    Hint: the stone does not travel 343 m/s.
     
  4. Feb 8, 2009 #3
    Ok so the time it takes the stone to fall is T. Shouldn't the time be close to that of the splash. So how do I find out the stone's Velocity.
     
  5. Feb 9, 2009 #4

    Redbelly98

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