| 21. | "Physical laws are distinguished from scientific theories by their simplicity.
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| 22. | First, he says, " You want him to know this is a physical law.
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| 23. | Perhaps, however, Tipler is referring to less complicated-- though more frustrating-- known physical laws.
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| 24. | Many worlds only describes universes with the same physical laws.
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| 25. | The best way to start is examining various physical laws and how they apply.
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| 26. | Specifically, energy is conserved if physical laws are invariant with respect to translation in time.
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| 27. | The only fundamental selective pressure is the ability of structures to adhere to physical law.
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| 28. | The article Orbit equation gives the physical laws that govern a " gravitational " orbit.
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| 29. | With the advent of special relativity, physical laws became susceptible to the formalism of tensors.
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| 30. | The universe is either pervaded by spiritual forces or ruled by nothing but physical laws.
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