Modal Mass</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;\begin{equation}</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    [M_{{m}}]=\sage{Modal_mass}</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;\end{equation}</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;Modal Contributi