Coulomb's law The principle that an electrostatic force of attraction or repulsion between electrical charges is directly proportional to the product of the electrical charges and inversely proportional to the square of the distance between them.Doppler Effect The distortion of the reception of a point source due to either a moving source, moving receiver, or both.DensityA material's mass divided by its volume. Displacement The staight-line distance from a moving object's original position to its final position. DynamicsThe branch of mechanics dealing with the motions of material bodies under the action of given forces
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