1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Sound waves, echo

  1. Nov 19, 2009 #1
    1. The problem statement, all variables and given/known data
    An alarm clock has been thrown down a well.

    around 100m deep well
    an alarm clock with a frequency of 368hz sounds for 3 seconds
    accelerating at 9.8 m/s2
    initial velocity 0

    2. Relevant equations
    How deep is the well? using doppler
    take in consideration of the echo
    what is the frequency of beats?

    3. The attempt at a solution

    I really have no idea :s
    all i got was that it had red shift and blue shift.
    the wall is the observer?
     
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted