deletions | additions       diff --git a/Payam.tex b/Payam.tex  index d186252..cb02237 100644  --- a/Payam.tex  +++ b/Payam.tex 
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\item In \citet{2013PhRvE..87d2723R} page 5, it is claimed that motion will be a superposition of longitudinal and transverse. Is this true -- won't one of them be unstable (in the case where work done in dragging is less than $T$, say)?  \item In \citet{2013PhRvE..87d2723R} page 5, second column, Payam uses dimensional analysis to justify a steady state approximation used in the paper: the time taken to establish the fluid velocity profile around a section of DNA must be much shorter than the time taken the DNA to move its own length.\newline Try length.\\   I want to try  to do a better job than Payam's  scaling argument: what are the coefficients? The fact that coefficients  in the other paper they are off by some distance $\# \ll 1$ relationship? This  might be to interesting because of a problem acknowledged in Payam's other paper: that his predictions  do with this. not fit the experimental data.  \begin{itemize}  \item I think $t_{\rm h}\sim \ell/c_{\rm s}$ on physical grounds, but Payam says $t_{\rm h}\sim \ell^2\rho/\eta$ from dimensional analysis. Are these compatible?  %