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Perpetual Motion

  1. Jan 25, 2014 #1
    According to the second law of thermodynamics, perpetual motion is impossible, right?
    But how do gas molecules in a closed container move perpetually?
  2. jcsd
  3. Jan 25, 2014 #2


    Staff: Mentor

    Its really not a closed system. The containers walls are made of atoms/molecules that are in motion as well and outside the system atoms/molecules are in motion.
  4. Jan 25, 2014 #3


    Staff: Mentor

    According to the second law of thermodynamics perpetual motion machines are impossible.
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