Abstract
Shortly after completing the general theory of relativity, Einstein went on to apply his new theory to the universe as a whole.
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Notes
- 1.
In case you are wondering, the first law of thermodynamics is just a statement of energy conservation, generalized to include thermal processes. It states that the total energy of an isolated system, including its heat energy, is conserved.
- 2.
This bleak prediction was publicized by the German physicist Hermann von Helmholtz. He called it the “heat death” of the universe.
- 3.
Friedmann did not consider this borderline case. It was later studied by Einstein and Willem de Sitter.
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Perlov, D., Vilenkin, A. (2017). An Expanding Universe. In: Cosmology for the Curious. Springer, Cham. https://doi.org/10.1007/978-3-319-57040-2_5
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DOI: https://doi.org/10.1007/978-3-319-57040-2_5
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