26.4. D http://www.ck12.org
26.4 D
decibel (dB)
Unit of intensity of sound.
decomposition reaction
Chemical reaction in which one reactant breaks down into two or more products.
density
Amount of mass in a given volume of matter; calculated as mass divided by volume.
deposition
Process in which a gas changes directly to a solid without going through the liquid state.
diffraction
Bending of a wave around an obstacle or through an opening in an obstacle.
direct current (DC)
Electric current that flows only in one direction.
distance
Length of the route between two points.
Doppler effect
Change in the frequency and pitch of sound that occurs when the source of the sound is moving relative to the
listener.