You should probably change the thread subject to "All-and-only 7 SI units" if that's what you mean.
On Mon, Apr 4, 2022 at 1:46 PM Brian McCall <brian.patrick.mcc...@gmail.com> wrote: > > I drove 20 minutes up the road to by a bushel (US, not British) of U.S. > No. 1. apples, to make apple cider. On my return trip, I stopped at the > hardware store to buy a 2 lb box of 1-3/4" ring shank 12 penny nails. I > used my 7/8 hole kitchen planer blade to grate the apples, then squeezed > them for an hour and a 15 minutes at 30 psi to extract the juice. For good > measure I added 2 tablespoons of vanilla and a pinch of salt. Then I drove > the nails into grade C 2x4 joists (whose sizes are 1.5 x 3.5 inches, with a > 1/16th inch permissible tolerance in sizing). > > I'm going to start by ignoring any quantities above that are not involved > in any sort of calculation. Those are outside the scope of the problem and > proposal. And I don't care what anyone thinks of that. > > The only calculation I see here is 1.5 in x 3.5 in = 0.00339 mm2. The fact > that joists are called 2x4 even though their nominal dimension is 1.5 in x > 3.5 in is also outside the scope of the problem and proposal. Come on man, > you think you're the only one who knows examples like this? How about 1/3" > image sensors? How about display diagonals? I know about these things, and > I know that they do not need to be accounted for in a standard, > language-supported representation of units. > > Units have infinite precision, so grades and tolerances are also > irrelevant. > > The units you mentioned are: > minutes > bushel (imperial) > bushel (US) > psi > tablespoon > pinch (it's a stretch, but okay) > foot > inch > > 7/8 hole - this is a specification, not a unit > 2x4 joist - specification, not a unit > grade C - specification, not a unit > 12 penny - Wikipedia calls it a unit, but calculations in measurements > taken in units of pennies are neither associative nor distributive, and > transformations on measurements taken in units of pennies are neither > additive nor multiplicative. > > Anyway, you mentioned you knew of at least 1000 units. I count 7. You have > another 993? > _______________________________________________ > Python-ideas mailing list -- python-ideas@python.org > To unsubscribe send an email to python-ideas-le...@python.org > https://mail.python.org/mailman3/lists/python-ideas.python.org/ > Message archived at > https://mail.python.org/archives/list/python-ideas@python.org/message/DHRG6STCIHJ2XOF6SE7O27UG7MX66DS5/ > Code of Conduct: http://python.org/psf/codeofconduct/ > -- Keeping medicines from the bloodstreams of the sick; food from the bellies of the hungry; books from the hands of the uneducated; technology from the underdeveloped; and putting advocates of freedom in prisons. Intellectual property is to the 21st century what the slave trade was to the 16th.
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