Go To Unit III Menu 2. A vibrating medium. Frequency is proportional to pitch. For example, the greater the frequency, the greater the pitch. Distinguish between a compression and a rarefaction.
Air is the slowest carrier of sound waves of the three.
Sound needs molecules bumping molecules to transfer the momentum and energy. There are no molecules in a vacuum. Defend your answer. Water and steel are much faster carries of sound than air. Low frequencies of sound are emitted by larger objects.