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Old 01-21-2011 | 05:18 AM
  #44  
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Cubdriver
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Not sure anyone asked, but mass is a measure of the amount of material in an object independent of any gravity field, while weight is a consequence of mass occurring in connection with a gravity field (Earth, Moon). Something has a set mass no matter where it is, but if it goes from the Earth to Moon its weight will vary. The difference becomes academic when the location is set, and we consider variation within a field like the Earth's gravity field to be trivial most of the time although it does vary quite a bit.

Earth's gravity field wiki article
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