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Why is it that most to the "Metric" countries sell "pints" in the pubs?
"A pint glass is a form of drinkware made to hold either a British ("imperial") pint of 20 imperial fluid ounces (568 ml) or an American pint of 16 US fluid ounces (473 ml). Other definitions also exist, see below. These glasses are typically used to serve beer, and also often for cider."
I'll never understand why the USA is still stuck in the old system. I was trained to be bi-lingual with SAE and SI in all my engineering and physics classes in the early 80s. But work did everything in Imperial, and put unit dimensions in parenthesis for metric.
And the worlds pilots are still using altitude in feet, barometric pressure in inches of Hg, and airspeed in knots. At least unit temperature operating ranges was in Celsius.
All the POTUS Jimmy Carter signs are gone from the roadways. And my latest auto does not have the dual speedometer range of earlier, only in MPH (and it's a Japanese design made in Mexico). If you live in states that incorporated as section road use of land, the mile will be stuck with us forever. As every mile, the state owns a 60 foot right of way, even across federal lands.
My only issue with the metric system is the size of the mm is wrong. Arbitrary. It should have been based on human factors of what the unaided eye can see, and be marked on a steel rule *. But like every other mistake, they become permanent errors that are supported forever.
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* I'm not aware of any quantum length that could set an absolute standard. Human factor is why water is used for a temperature scale, metric weight used that as well. And it's only an issue when correct dimension analysis is not done.
At least my newer lathe has both scales, and a mix of Imperial and metric feed screws. It has change gears for metric and SAE thread, but I can't disengage the half nuts during metric, and that makes me razzle frazzle, and cuss.
Toolmaker51 (Dec 21, 2020)
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