makes it move faster meaning a more high pitched sound
The sound is produced by the vibration of the string.
The longer the string - the slower the vibration (and lower the note produced). If you shorten the string - it vibrates faster, producing a higher-pitched note,
The vibration is changed by either reducing the length of the string (holding it down on a fret) or changing the tension of the string.
The sound is produced by the vibration of the string.
Moving your finger along the string will alter the length and the pitch of the sound produced.
An individual point particle in the standard model is described in string theory as a mode of vibration of a string. If for some reason the mode of vibration of the string changed, the particle would change to a different one.
There are some complex physics behind string vibrations. Essentially, the looser the string, the less nodes, or points where the sound waves go from crest to trough. This of course affects the frequency, or rate at which the string vibrates. So when the string is tightened, more nodes are created, and the frequency increases, increasing the pitch.
If you excluded two tin cans with a string, alltelephones change sound vibrations into electrical vibrations.
A violin produces sound by the vibration of the bow on the string, or the vibration when you pluck a string.
Vibration
Moving your finger along the string will alter the length and the pitch of the sound produced.
Loosening the string will LOWER the frequency, tightening it will RAISE the frequency.