Answers

2014-10-23T09:20:35+08:00
Speed ia a scalar quantity. The rate at which an object covers distance. In physics, it is the quantity that measures the ratio of an evolution of time. the formula: speed= distance/time
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2014-10-23T16:17:11+08:00

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It describes the rate of motion of an object. Speed is measured with a speedometer...

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