en, in general, the P is somewhat big,(i have a look at the forum posted before)<br>but if i should estimate the change of volume, what is the dV/da (c) criterion?<br> <br><br><div class="gmail_quote">2008/11/24 Paolo Giannozzi <span dir="ltr"><<a href="mailto:giannozz@democritos.it">giannozz@democritos.it</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d">xu yuehua wrote:<br>
<br>
> why P is so big ?<br>
<br>
</div>try to estimate how much the volume should change in order to<br>
offset the pressure, before claiming that "P is big"<br>
<br>
Paolo<br>
<font color="#888888">--<br>
Paolo Giannozzi, Democritos and University of Udine, Italy<br>
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</font></blockquote></div><br><br clear="all"><br>-- <br>Xu Yuehua<br>physics Department of Nanjing university<br>China<br>