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<p>[QUOTE=&quot;physics-fan3.14, post: 3170099, member: 19165&quot;]I think a lot of people don&#039;t pay a whole lot of attention to their use of the words. You&#039;ll hear various people use them interchangeably, as mentioned earlier. I think it&#039;s partly because people are lazy, and partly because people don&#039;t really think about the differences. But, if you are writing a book you want to try to be as technically accurate as possible. Good luck with the writing![/QUOTE]</p><p><br /></p>

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