A certain transverse wave is described by

y$($x$,$t$)=$Bcos$[2$$($xL$$t$)]$y$($x$,$t$)=$Bcos$[2$$($xL$$t$)],$

where BB $=6\mathrm{.}10$ mmmm$,$ LL $=28\mathrm{.}0$ cmcm$,$ and $=3\mathrm{.}00102$ ss$.$