| 1. | A physical model may show inner parts that are normally not visible.
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| 2. | Physical models of gravity wells are sometimes used to illustrate orbital mechanics.
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| 3. | Moreover, physical models are not robust and they decay over time.
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| 4. | However users can create new physical models, based on different Lagrangians.
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| 5. | These digital models create a physical model for mouldmaking using rapid prototyping techniques.
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| 6. | Students also build physical models and create presentation boards for drawings and graphics.
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| 7. | Virtual yachts were put through computer races before the first physical models were built.
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| 8. | The book was written as a guide book to building polyhedra as physical models.
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| 9. | The clusters become evident in a physical model using elastic bands and paper clips.
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| 10. | More recently, he has turned his attention to physical models of shoot morphogenesis.
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