Vocal pitch is just the same as any other instrument. Most people, who aren't even singers can produce at least one full octave of musical notes, but professional singers can sing at least two full...
It can be controlled by many things, but here are at least three: Length of the vocal cords.Thickness of the vocal cords.And stress on the vocal cords.That of course, it is the human body.If your...
Helium is a very light gas. Light gases tend to float (as seen in a helium filled balloon). It is a light gas because it moves very very fast. It is said to be NOT dense. When you have sucked Helium...