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

Density equation of sound wave

  1. Jan 23, 2010 #1
    Let pressure equation of sound wave be
    [tex]\Delta[/tex]p=Pocos([tex]\omega[/tex]t-kx), then
    what will be the density equation of the sound wave?
    give your answer with proof and proper explanation...(Derive the equation)
  2. jcsd
  3. Jan 23, 2010 #2


    User Avatar
    Science Advisor
    Homework Helper

    Hi abhineetK! :wink:

    Show us what you've tried, and where you're stuck, and then we'll know how to help! :smile:
  4. Jan 23, 2010 #3
    [tex]\delta[/tex]P=Pocos([tex]\omega[/tex]t-kx) ...(1)

    B=-[tex]\delta[/tex]P/([tex]\Delta[/tex]V/V) ...(2)





    =>[tex]\partial\rho[/tex]/[tex]\rho[/tex]=[tex]\delta[/tex]P/B [using (2)]

    =>[tex]\partial\rho[/tex]=([tex]\rho[/tex].Po/B)cos([tex]\omega[/tex]t-kx) [using (1)]
    Is it correct?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook