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Re: [Phys-l] Sig figs

I forgot to mention "accuracy " here is rather important if one plans to do a "temperature" fit. i.e. heat the outside piece and or cool the inner.

bc doesn't know the correct term.

On 2010, Oct 17, , at 06:20, John Denker wrote:

Concerning the round peg in the round hole: To a first approximation,
you don’t care about the diameter of the peg or the diameter of the hole,
provided the peg fits into the hole with the proper amount of clearance.
This is an example of _correlated_ uncertainties.
The amount of clearance is the proverbial small difference between large
numbers, which means that the relative uncertainty in the clearance will
be orders of magnitude larger than the relative uncertainty in the diameters.