| 21. | The FAA could eventually conclude that some planes need physical changes.
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| 22. | It's not so much a physical change as a sociological one.
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| 23. | She undergoes many physical changes and suffers from identity problems throughout the series.
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| 24. | Most of the physical changes going on are at Bear Mountain,
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| 25. | Neither Glavine nor Maddux has noticed much of a physical change so far.
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| 26. | Titania's physical changes bring a new personality to the fore.
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| 27. | They are also known as mechanoreceptors because they recognize physical changes not chemical changes.
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| 28. | The majority will measure physical changes in the astronauts as they adapt to weightlessness.
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| 29. | Physical changes _ including hormonal ones _ are taking place.
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| 30. | In general a physical change is reversible using physical means.
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