## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

$L = 0.35~m$
We can find the wavelength as: $\lambda = \frac{v}{f}$ $\lambda = \frac{350~m/s}{250~Hz}$ $\lambda = 1.4~m$ We can find the length of this tube as: $\lambda = 4L$ $L = \frac{\lambda}{4}$ $L = \frac{1.4~m}{4}$ $L = 0.35~m$