Final answer:
The subject of this question is Physics, and the question is about the scale that expresses the relative intensity of sounds from 0 to 120. This scale is known as the sound intensity level and is measured in decibels (dB).
Step-by-step explanation:
The subject of this question is Physics. The question is asking about the scale that expresses the relative intensity of sounds. This scale ranges from 0 to 120. This scale is known as the sound intensity level and it is measured in decibels (dB).