Concept:Pitch of a note depends on the frequency of the sound wave, and frequency is determined by factors such as tension and mass of a vibrating string, not by amplitude.
Explanation:The pitch of a note is directly linked to the frequency of the sound produced.
Higher frequency means higher pitch, and lower frequency means lower pitch.
For a vibrating string, its frequency depends on the tension in the string and the mass per unit length of the string.
If the tension changes, the frequency changes, so pitch is affected.
If the mass of the string changes, the frequency also changes, so pitch is affected.
Amplitude of a sound wave controls the loudness or volume of the sound, not its pitch.
Therefore, the pitch of a note is not affected by the amplitude of the sound wave.
Answer:D. amplitude of sound wave.