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Quite tough question

  1. Aug 12, 2006 #1
    What is a perfectly elastic collision?

    Does it exist in the real world?
  2. jcsd
  3. Aug 12, 2006 #2
    Perfect elastic collision is a collision where no kinetic energy is lost during the collision (so there is no sound and no friction during the collision). This occurs on the atomic level (for example gas particles collide basically elastically)
  4. Aug 12, 2006 #3
    i thought thats only an elastic collision?
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