A wave on a string is described by

$D(x,t)=$

$(2\mathrm{.}00cm)sin[(12\mathrm{.}57ra\frac{d}{m})x-(638ra\frac{d}{s})t]$

where $x$ is in m and $t$ is in s $.$ The linear density of the string What is the string tension?

Express your answer with the approp is $5\mathrm{.}00\frac{g}{m}$