| 21. | Angular momentum must be conserved in an isolated system.
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| 22. | Suppose a system is thermally and mechanically isolated from the environment ( isolated system ).
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| 23. | One may imagine an isolated system, initially not in its own state of internal thermal equilibrium.
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| 24. | Only an isolated system has a coordinate-independent mass.
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| 25. | The claims have been criticized for ignoring that the second law only applies to isolated systems.
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| 26. | Suppose we have an isolated system whose macroscopic state is specified by a number of variables.
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| 27. | Overall, in an isolated system, the internal energy is constant and the entropy can never decrease.
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| 28. | The picture given in the preceding paragraphs is sufficient for description of a completely isolated system.
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| 29. | The second law of thermodynamics describes how the entropy of an isolated system changes in time.
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| 30. | In physics, isolated systems must obey conservation laws.
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