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Some "New SI" physical constants seem currently to be inaccurate

Posted 6 years ago

Consider the current dataset value of the elementary charge:

In[1]:= Quantity["ElementaryCharge"] 10^19 // UnitConvert // First

Out[1]= 80108817/50000000

In[2]:= % // N[#, 10] &

Out[2]= 1.602176340

whereas the correct "New SI" exact value (times 10^19) is:

In[3]:= 801088317/500000000 // N[#, 10] &

Out[3]= 1.602176634

Apparently, one significant digit has been dropped, which affects all the corresponding unit conversions.

Data source: https://physics.nist.gov/cgi-bin/cuu/Value?e

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