| 11. | Note that nowadays the dimensionless notation is reserved for molecular weights.
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| 12. | One such dimensionless physical constant is the fine-structure constant.
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| 13. | You can do physics without units working with only dimensionless quantities.
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| 14. | The question is : What happens to the corresponding dimensionless variables?
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| 15. | Angles expressed in radians are dimensionless for the purposes of dimensional analysis.
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| 16. | Thus there is 3 & minus; 2 = 1 dimensionless quantity.
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| 17. | The ratio of these resistances is the dimensionless Biot number.
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| 18. | Important dimensionless quantities are called first-order dimensional requirements.
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| 19. | The K-factor is a dimensionless constant defined as:
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| 20. | This is not an actual temperature, because is dimensionless.
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