| 11. | Totally frictionless shoes would be impossible to walk in.
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| 12. | Let's assume frictionless pipes and zero viscosity water just for fun.
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| 13. | Let's do it in a perfect vacuum with totally frictionless bearings.
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| 14. | By comparison, ours is a frictionless world.
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| 15. | The relationship thus only holds exactly in an ideal frictionless market with unlimited liquidity.
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| 16. | Bead constrained to move on a frictionless wire.
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| 17. | Motion of the rod along these circles, acting as guides, is frictionless.
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| 18. | Approximants are sometimes called " frictionless continuants ".
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| 19. | They would essentially be frictionless, or floating a few inches off any ground.
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| 20. | Assume the paddle wheel is massless and frictionless.
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