Answer:
The answer is: Flutes
Explanation:
<em>"Chinese archeologists have unearthed what is believed to be the oldest known playable musical instrument, a seven-holed flute fashioned 9,000 years ago from the hollow wing bone of a large bird."</em>
The frequency of waves is given in: Hertz(Hz)
Answer:
printers arent as advanced yet, so they wont have the perfect photography as when you draw something or a image on a computer.
hope this helped!