02:38
University Physics with Modern Physics
The speed of sound in air at $20^{\circ} \mathrm{C}$ is 344 $\mathrm{m} / \mathrm{s} .$ (a) What is
the wavelength of a sound wave with a frequency of 784 $\mathrm{Hz}$ , corresponding to the note $\mathrm{G}_{5}$ on a piano, and how many milliseconds does each vibration take? (b) What is the wavelength of a sound wave one octave higher than the note in part (a)?