Speeds
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In kinematics, the speed of an object is the magnitude of its velocity (the rate of change of its position); it is thus a scalar quantity. The average speed of an object in an interval of time is the distance traveled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero . Like velocity, speed has the dimensions of a length divided by a time; the SI unit of speed is the meter per second, but the most usual unit of speed in everyday usage is the kilometer per hour or, in the USA and the UK, miles per hour. For air and marine travel the knot is commonly used. The fastest possible speed at which energy or information can travel, according to special relativity, is the speed of light in vacuum c = 299,792,458 meters per second, approximately 1079 million kilometers per hour (671,000,000 mph). Matter cannot quite reach the speed of light, as this would require an infinite amount of energy. From Wikipedia under the
GNU Free Documentation License Nounspeeds
speeds
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GNU Free Documentation License Matching Results for Speeds:HesiodHesiod (Hesiodos) was an early Greek poet and rhapsode, believed to have lived around the year 700 BC. ... The dawn speeds a man on his journey, and speeds him too in his work. ... Silver Surfer Traveling at nearly limitless speeds upon a silvery board controlled by his thought, he sought out worlds suitable for Galactus to consume, until ... Greg Maddux "I try to do two things: locate my fastball and change speeds. ... I just throw my fastball (to) both sides of the plate and change speed every now and then. ... From Wikiquote under the
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