Watt
REM
Centigrade
Decibel
Answer is Wrong!
Answer is Right!
The correct answer is D. Decibel.
A decibel (dB) is a logarithmic unit that expresses the ratio of a physical
quantity (such as sound pressure, power, voltage, etc.) to a reference value. It is often used to express the level of a sound, with 0 dB being the threshold of human hearing.A watt (W) is a unit of power, which is the rate at which energy is transferred or converted.
A REM is a unit of measurement of the depth of sleep.
Centigrade is a scale of temperature that is based on the freezing and boiling points of water.