deletions | additions       diff --git a/data and analysis c4.tex b/data and analysis c4.tex  index 1506423..6fb27fb 100644  --- a/data and analysis c4.tex  +++ b/data and analysis c4.tex 
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\subsection{Fourth Sound}  Fourth sound is now calculated in the same fashion as above by the equation \[c_4=f2L\] for n=1 and L=.0495 meters as before.