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: Speed of wave on guitar string

  1. Sep 27, 2014 #1
    1. The problem statement, all variables and given/known data
    A 65-cm guitar string is fixed at both ends. In the frequency range between 1.0 and 2.0 kHz, the string is found to resonate only at frequencies 1.2, 1.5, and
    1.8kHz .

    What is the speed of traveling waves on this string?

    2. Relevant equations
    f = v/2l

    3. The attempt at a solution

    Each one of these is a multiple of .3 so i think that is the fundamental frequency. Then I use f=v/2l or
    v= 2 * .65 * .3
    v = .39

    but i did it wrong. can someone help please
  2. jcsd
  3. Sep 28, 2014 #2
    Check your units. You need to convert kHz to Hz in order to come up with a velocity in m/s.
  4. Sep 28, 2014 #3
    What does "l" mean in that equation? And where does the equation come from?
  5. Sep 28, 2014 #4
    oh wow cant believe i missed that. thank you
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted