| 1. | Closed systems cannot exchange matter with the surroundings, but can exchange energy.
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| 2. | Exchange energy of adjacent moments increases as the angle between the two moments increases.
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| 3. | An exchange energy functional was added by Dirac in 1928.
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| 4. | This difference in energy is called the exchange energy.
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| 5. | Nuclear fusion, nuclear fission, and even your generic chemical reaction all exchange energy for mass.
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| 6. | Exchange energy splittings are very elusive to calculate for molecular systems at large internuclear distances.
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| 7. | The exchange energy tends to favor configurations where the magnetization varies only slowly across the sample.
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| 8. | The charge carrier exchanges energy with one of the polar optical modes of the crystal lattice.
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| 9. | The charge carrier exchanges energy with an acoustic mode of the vibration of atoms in the crystal lattice.
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| 10. | In particular, for a constant density " ? ", the exchange energy density is proportional to " ?"
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