In physics, approximations are important. Developing a predictive model for how something will move/behave/react based on information from another object or scenario can provide a helpful frame of reference. To illustrate this point, the always excellent YouTube series MinutePhysics shows us how to weigh a million dollar bills without having a scale, a single bill, or the knowledge of how much a dollar weighs.
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Source: http://feeds.gawker.com/~r/gizmodo/full/~3/f-xc9xWK6hs/how-to-weigh-a-million-dollar-bills-without-actually-weighing-a-million-dollar-bills
midnight madness midnight madness john henry john henry zack greinke zack greinke siri
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