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 Traveling Down a String

  1. Apr 27, 2012 #1
    1. The problem statement, all variables and given/known data

    A brother and sister try to communicate with a string tied between two tin cans. If the string is 9.5m long, has a mass of 55g and is pulled taut with tension 6N, how much time does it take for a wave to travel from one end of the string to the other?

    2. Relevant equations


    3. The attempt at a solution

    First, I converted 9.5m to 950cm and 55g to .055kg
    I used these to find M=.055/950
    M=5.7* 10^-5
    I used F=6N and divided that by M, then took the square root and i got
    then I divided 950 by 321.96 in order to get the time, and got
    t=2.95 but this is incorrect.
  2. jcsd
  3. Apr 27, 2012 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Why? Meters is the units you want.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook