Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Rubber band

  1. Jan 8, 2009 #1


    User Avatar

    In the text, there is a rubber band model for 1D chain of N links. Assume each link of the rubber band is align horizontally either to the right or to the left. In the text, define [tex]N_+[/tex] as the number of links directed to the right and [tex]N_-[/tex] represents the number of links directed to the left. I think the total configuration of the system should be

    [tex]\Omega = \frac{N!}{N_+!N_-!}[/tex]

    but it is

    [tex]\Omega = \frac{2N!}{N_+!N_-!}[/tex]

    I wonder where is the "2" come from?
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted

Similar Discussions: Rubber band
  1. Hot rubber band (Replies: 5)

  2. What drives rubber bands (Replies: 24)