# Determining the value of the fine-structure constant from a current balance: Getting acquainted with some upcoming changes to the SI

@article{Davis2017DeterminingTV, title={Determining the value of the fine-structure constant from a current balance: Getting acquainted with some upcoming changes to the SI}, author={Richard S. Davis}, journal={American Journal of Physics}, year={2017}, volume={85}, pages={364-368} }

The revised International System of Units (SI), expected to be approved late in 2018, has implications for physics pedagogy. The ampere definition, which dates from 1948, will be replaced by a definition that fixes the numerical value of the elementary charge e in coulombs. The kilogram definition, which dates from 1889, will be replaced by a definition that fixes the numerical value of the Planck constant h in joule seconds. Existing SI equations will be completely unaffected. However, there… CONTINUE READING

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