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Why do two particles hold themselves together in a vacuum?

  1. Jan 11, 2010 #1
    So, I've been wondering about this lately and wanted to know if anyone could provide me with a straightforward answer on what the theory behind this phenomenon currently is?
  2. jcsd
  3. Jan 12, 2010 #2


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    Science Advisor

    You need to give more context. If they are charged, then the electromagnetic force comes into play. If they are nucleons, then (depending on details) the strong force will be applicable. If they are just pieces of dust, they probably won't stay together, except by coincidence.
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