The frequency of a sound wave is measured in a unit called ______

According to Silverstein (1979), which of the following contributes to football injuries?

A. age of participant B. weight of participant C. previous playing experience of participant D. age AND weight of participant

After many ear infections during childhood, Zach developed damage to the semicircular canals in his inner ear. As a result, he periodically has difficulty standing upright and at times feels he is off balance

Zach is experiencing __________ difficulties. a. kinesthetic b. equilibrium c. olfactory d. auditory