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Does the first law of thermodynamics apply to the cosmological universe?

  1. Jun 21, 2011 #1
    How can the conservation of energy be applied to the entire universe? How can we define the energy of the universe? Is this definition unique for different observers? What is the difference between the thermodynamics universe (system+environment) and the cosmological universe?
     
  2. jcsd
  3. Jun 21, 2011 #2

    atyy

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