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 standing wave

  1. Feb 2, 2009 #1
    1. The problem statement, all variables and given/known data

    The standing wave in the picture is oscillating at 100 Hz. What is it's velocity?

    2. Relevant equations


    I believe is the equation that applies here.

    3. The attempt at a solution

    The wavelength from the picture appears to be 20x10-2 meters.

    So velocity should equal (20x10-2)(100)= 20 meters per second

    But I know this answer is wrong. Where am I going wrong?

    Attached Files:

  2. jcsd
  3. Feb 2, 2009 #2


    User Avatar

    Staff: Mentor

    Why do you say that the wavelength is 20cm? Draw a full cycle of a sine wave -- what does it look like?

    Also, be careful with your units. It looks like you are mixing cm and meters in your multiplication and answer....?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook