A guitar string that is $0\mathrm{.}656m$ long oscillates in the third harmonic $($third smallest frequency$).$ These

oscillations emit a sound that travels at a speed of $v=339\mathrm{.}16\frac{m}{s}$ towards a resonance tube that

has one end open and one end closed, to set up a standing wave in the resonance tube.

The wavelength of the sound wave in the tube is $=0\mathrm{.}325m,$ and it is the $4$ th longest

wavelength.

$($The following questions will be marked correct only if your answer is within $1\%$ of the correct

value.$)$

What is the speed of the displacement wave in the string?