Answer:
1.When the rubber bands are plucked in order, from thinnest to thickest, the sound will gradually change from a high pitch to a low pitch. When a ruler "bridge" is added, it absorbs some of the vibrations. The length of the rubber band that is able to vibrate becomes shorter.
2.The sound made by your instrument was the sound created by the rubber band vibrating when you plucked it, much like how a real guitar string vibrates when played by a musician.
3.Different rubber bands will produce different resonant frequencies, depending on their thickness or width, and how tightly they are stretched. Thicker, heavier, and loosely stretched rubber bands will sound lower pitched, while thinner, lighter, tightly stretched rubber bands will sound higher.
4.The thickness of the rubber band changed the tone of the sound you heard when you plucked it. The thinner strings on a guitar make a higher-pitch sound because they can vibrate more quickly than the thicker ones.
5.The original rubber band arrangement will produce lower pitched sounds than those made when the ruler is placed in the center. If the ruler is placed off center, the longer side will produce low, long, heavy sounds, while the shorter side will produce the high, short sounds.
