Worst part about moving to the US has been not being able to fit my US letter documents into a A4 document folder. Sorry Americans, like Fahrenheit, you've got it wrong. A4 is the superior paper size.
(at a pressure of one atmosphere) The linkage comes from the definition of calorie in those terms. A joule (an equivalent unit) is defined in other terms, such as energy dissipated when a 1amp current passes through a 1ohm resistance for 1s.
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I don't think in day to day usage people really care what the definition of a (small) calorie is. But I can see in scientific environments where measures like calories and joules are used it could be helpful.
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Well I’m British so I will happily argue for Celsius. Not for km though, they’re nonsense. And weighing humans should be in units of 14 pounds. And money should be divisible by 12 or 8 or 3, and preferably all of those. And
End of conversation
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