determine which of the following must change when pitch gets higher a. amplitude b. frequency c. wavelength d. intensity e. speed of sound waves

Th Correct Answer is C

Explanation:

Changing Pitch

The four characteristics of the series that influence its frequency are density, diameter, tension, and length. These characteristics are illustrated below: While the length of a sequence is modified, it will reverberate with a distinct wavelength. Lower strings have a greater frequency and therefore more powerful pitch.

Higher pitch means higher frequency.

But higher frequency also means shorter wavelength, because the product of (frequency) x (wavelength) is the wave-speed, so it doesn't change.

So (b) and (c) must both change.