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Homework Help: An Elementary question for general physics

  1. Jun 26, 2005 #1
    I know this probaly should be in the K-12, but I'm in college and I am enrolled in a general physics course.

    Okay, my question is if a rock drops off a sea cliff (note: NOT THROWN), and the sound of it when it hits the ocean water is heard 3.4 s later. And the speed of sound is 340 m/s. How high is the cliff? How do I figure this one out? :confused:
     
  2. jcsd
  3. Jun 26, 2005 #2
    Hmm, the total time for you to hear it will be the time it took for the rock to fall and hit the water + the time it takes the soundwave to come back up. Try expressing the total time as the sum of these two events, maybe you can work from there.
     
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