You are presented with the question "What unit is used to measure the intensity of matter vibrating?" and the following answer choices: 
- Joules
 - mechanical
 - Nanometers
 - Decibels
 - Hertz
 - waves
 - power
 - a prism

Now knowing that matter vibrating can cause sound and intensity , or loudness of sound, is measured in decibels , choose the best answer.


 

    Decibels     