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: Particle question

  1. Jan 10, 2008 #1
    1. The problem statement, all variables and given/known data

    In figure 1.55 diagram I, A, B, C, D, .... are the equilibrium positions of some air particles along an imaginary line XY. Diagram II shows the same particles some time later.

    * * * * * * * * * * * * *
    A B C D E F G H I J K L M

    Diagram I

    * ---- * * * * * ---- * -------* * * * *------- *
    A ---- B C D E F ---G ------ -------I J K L ------ M

    Diagram II

    Figure 1.55

    a) Identify the particles in diagram II that are in phase.
    b) In which direction will C move immediately after this instant in time.

    2. The attempt at a solution

    a) I feel that B- F are in phase with I- L as they are both areas of compression representing crests on a transverse wave.

    However, the answer says A and M are in phase

    b) I feel that C should move right back to the equilibrium position as shown in diagram I, however the answer says C should left.

    Any help would be grateful
    Last edited: Jan 10, 2008
  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