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Does anyone know where to find the bulk modulus of liquid helium ?

I've been looking all over the internet but everywhere I get N/A. Any tips ?

I'd need it to estimate the speed of first sound in liquid helium which is given by:

$c_1=\sqrt{\left.\frac{\partial p}{\partial\rho}\right|_\sigma}$

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A Google books search for "bulk modulus of liquid helium" turned up this result: Helium, edited by Paul Muljadi. On page 7, you will find the value of the bulk modulus as on the order 50 MPa. There is a reference linked to this value, but it is not part of the free preview, so I cannot tell you what it is.

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  • $\begingroup$ Alrighty! Thanks a lot already ! I'll look into it, seems to give the correct value for the speed of first sound (more or less). $\endgroup$
    – Nick
    Dec 3, 2013 at 19:10
  • $\begingroup$ Seems also that this 50MPa is for solid Helium and not liquid helium (that should be somewhere around a factor 1000 lessà $\endgroup$
    – Nick
    Dec 3, 2013 at 19:22
  • $\begingroup$ Ah, well I tried. I bet searching through the other books in the Google-book search might pop up something more accurate. $\endgroup$
    – Kyle Kanos
    Dec 3, 2013 at 19:34
  • $\begingroup$ Yeah, at least thanks for trying! I've been looking on physical review letters etc. Not even [WolframAlpha][1] was able to find it. Currently I'm looking in google-books, great tip :). [1]:wolframalpha.com $\endgroup$
    – Nick
    Dec 3, 2013 at 19:36
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The best way is to use the inverse value, the compressibility, this one is more easilly found.

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