Q: Because sound waves must move through a medium, there are no sound waves in a what? Read this paragraph and choose the correct option from the provided answers: Sound Auditory stimuli are sound waves, which are mechanical, pressure waves that move through a medium, such as air or water. There are no sound waves in a vacuum since there are no air molecules to move in waves. The speed of sound waves differs, based on altitude, temperature, and medium, but at sea level and a temperature of 20 C (68 F), sound waves travel in the air at about 343 meters per second. As is true for all waves, there are four main characteristics of a sound wave: frequency, wavelength, period, and amplitude. Frequency is the number of waves per unit of time, and in sound is heard as pitch. High-frequency (15.000Hz) sounds are higher-pitched (short wavelength) than low-frequency (long wavelengths; 100Hz) sounds. Frequency is measured in. Choices: - solid - liquid - gas - vacuum A:
The answer to this question is:
vacuum