6. Two major classes of waves are longitudinal and transverse. Which type are sound waves 7. The frequency of a sound signal refers to how frequently the vibrations occur. A high-frequency sound is heard at high (pitch, wavelength, or speed). 8. The sketch below shows a snapshot of the compressions and rarefactions of the air in a tube as the sound moves toward the right. The dots represent molecules. Describe how to draw a sine wave that corresponds to the pressure of the sound wave. 9. Compared to wavelengths of high-pitched sounds, the wavelengths of low-pitched sounds are (long or short). 10. Suppose you set your watch by the sound of the noon whistle from a factory 3 km away. Assume the speed of sound is 340 m/s. How long does it take for the sound to reach you? 11. Sound waves travel fastest in (solids, liquids, gasses, or at the same speed in each). distance of 2.7 m? 12. How much power does a sound source generate if the intensity is 3.2 x 106 W/m at a 13. What determines the pitch of a musical