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the state or fact of being apart in space, as of one thing from another; remoteness.
the state of being displaced or the amount or degree to which something is displaced.
rapidity in moving, going, traveling, proceeding, or performing; swiftness; celerity: the speed of light; the speed of sound.
he average distance traveled per hour; the distance traveled divided by the time taken
Instantaneous speed is the speed at a particular moment in time
he rate of speed with which something happens; rapidity of action or reaction.