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: Two tuning forks are producing sounds of wavelength

  1. Jan 31, 2007 #1
    Two tuning forks are producing sounds of wavelength 36.0 cm and 33.8 cm simultaneously. How many beats do you hear each second?



    I know that the # of beats/sec heard is equal to the difference of frequency 2 and 1. Frequency = 1/T = v/lambda.



    Don't feel that I have enough information
     
    Last edited by a moderator: Mar 8, 2013
  2. jcsd
  3. Jan 31, 2007 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Start by figuring out the frequencies of those sounds. Hint: You'll need the speed of sound.
     
  4. Jan 31, 2007 #3
    Okay, so the speed of sound v=345 m/s
    F1 = 345m/s / .36m
    =958 Hz

    F2 = 345m/s / .338m
    =1020.7 Hz

    so then beats/second = 1020.7-958??
    =63 beats/second
     
  5. Jan 31, 2007 #4

    Doc Al

    User Avatar

    Staff: Mentor

    Sounds about right.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook