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Re: capacitance of a disk

An innocent reader (like me) might easily speculate on how exact
a result can be which depends for its magnitude upon
a physical quantity like epsilon_0 - the permittivity of free
space, six decimal places known with certainty from my data
book reference.

eps0 is known *exactly*. It is a defined quantity now that
the speed of light *in vacuo* and mu0 are both defined.