Question

question 4 (multiple choice worth 1 points) (02.01r lc) what is a hertz? an expressive marking that means \slowly\ a kind of specialized woodwind instrument a system of notating what pitches to play a system of measuring the speed of vibration

Explanation:

A hertz (Hz) is the SI unit of frequency, which measures the number of cycles or vibrations per second. It is a way to quantify the speed of vibration.

Answer:

D. A system of measuring the speed of vibration