Question

unit 7 \physical interaction\ test
sound intensity is measured in ___.
decibels.
hertz
infrared waves
nanometers

Explanation:

Sound intensity is a measure of the power carried by sound waves per unit area in a direction perpendicular to that area. Decibels (dB) are the units used to express the ratio of two values of a physical quantity, often power or intensity. Hertz measures frequency, infrared waves are a type of electromagnetic - wave, and nanometers measure length.

Answer:

A. decibels