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: Harmonic Sound Wave (pls advise)

  1. May 10, 2004 #1
    Hi all,

    can somebody advise on this,

    P (change in pressure) = p (density of gas)*w*v*s(max displacement amplitute)

    P = pwvs

    Needed to know, is the density of gas always at 1.29kg/m(3)?

    I've this following qeustion:
    A piston at one end of a long tube filled with air at room temperature and normal pressure oscillates with a frquency at 500Hz and an amplitude of 0.1mm. What is the intensity of the waves?

    = 1.29*2pie(500)*340*1E-4
    = 138Pa

    if the density of gas does not always = 1.29kg/m(3), then how can I calculate the density of gas from the above question?

  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