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International System of Units overhauled in historic vote

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Re: International System of Units overhauled in historic vote

#521
post #236

The US didn't adopt the metric system because it was considered blasphemous since the French used it. I'm not joking. We got screwed by a bunch of demagogues.

The US officially adopted the metric system in 1975 with the Metric Conversion Act.

Moreover the US signed the Convention du mètre [0] in 1878. By law all US customary units are based on SI units since 1883 [1]

[0] https://en.wikipedia.org/wiki/Metre_Convention [1] https://en.wikipedia.org/wiki/Mendenhall_Order

Re: International System of Units overhauled in historic vote

#522
post #488

Earlier quoted context omitted.

My cupboard has cups in all kinds of sizes. Which one is the right one to use as a measurement? And for baking there's quite a big difference if my cups are 150 ml or 350 ml, especially when paired with counted ingredients like eggs. That's the problem with cups.

All of your regular coffee cups are exactly 250ml. Regular people use them for basic baking all the time, like making pancakes. 'Cups' are still better measures than ml because even you, in your self-acclaimed ignorance have a sense of how much a cup is whereas people do not have any idea how much '300ml' is. Canadians have no clue what 10ml of anything is. Canadians will continue to use feet and pounds for personal…

For 300 ml there are measuring cups that have a scale on the side. Same for 250 ml by the way. Incidentally, I wouldn't be sure I could actually measure 1⅕ cups of anything (under your assumption that a cup is exactly 250 ml (Do I fill them completely? One cm below the top? And while about 50 % of the cups here seem to roughly fit that size, the others are different.)).

I don't order beer at all, but around here it's usually ordered as 500 ml (a little further south, especially around October, they tend to order 1 liter).

Re: International System of Units overhauled in historic vote

#523
post #288

Earlier quoted context omitted.

Additionally, base 12, would not act like 12 does in base 10, thus if base 12 is your key point of reference, a foot should be 10 in base 12 for inches..... I honestly cannot make any sense of this part of your argument. The symbols 10 would only look like ten they would still mean a dozen and the properties would remain the same. Furthermore people don’t think in twelves because we are not taught in a dozenal number…

He is saying that you need twelve digits to actually use base 12 and that in every base N with N>1 you write N as 10 (eg in hex 10 is A and 16 is 10)

Understood, his mistake was this “base 12, would not act like 12 does in base 10". That statement is mistaken. A dozen would look like ‘10’ but it would still behave like a dozen.

Re: International System of Units overhauled in historic vote

#524

Earlier quoted context omitted.

We just report it to the degree (high of 34 tomorrow, 32 the next day). That's really plenty of resolution for non-scientific measurement.

And is also more resolution than the error warrants

I think I meant less for forecasts and more for weather apps and thermostats. I really think it could help with adoption. But if it’s not warranted by the error then maybe I’ll reconsider.

Re: International System of Units overhauled in historic vote

#525

Earlier quoted context omitted.

A yard is three feet, or about the length of a man's stride. A quart is about the maximum amount of whiskey one can drink without dying. A pint's a pound, the world around. My favorite is the cord, which is 128 cubic feet, or more often a stack of firewood 4 feet tall by four feet wide by eight feet long.

A yard is not just a measure of length, but of volume and in a manner, constitution if you will, as it is also 2 1/2 pints[1], good sir or ma'am. Oy! 1. https://en.wikipedia.org/wiki/Yard_of_ale

Between that and the GP, we could establish a conversion between yards and quarts.

Re: International System of Units overhauled in historic vote

#526
post #264

Earlier quoted context omitted.

They're globally standard, decimal, and internally consistent. One never needs to wonder how many meters in a kilometer or how many grams in a kilogram. They have some human usable qualities as well; it's convenient that water freezes at 0°C and that a kilogram of water is also a liter.

Are they globally “standard?” China uses Mou to measure land area. A pyeong is used in Korea for housing floor area, the British use pints in the pub and stone when weighing themselves. The US uses feet and pounds. We use clocks that have 60 seconds, 60 minutes, 24 hours, weeks, months. If we want to be consistent, “minutes” should perhaps be 100 seconds, for instance. Horses are measured in “hands.” “Global standard…

Global standard doesn't mean that every person everywhere uses metric. It means that people everywhere can use metric and they know what it means, and that official weights and measures are done in metric. Use whatever glass size you want at the bar, or measure your horses however you wish, but when you get on the road the signs are in km/h.

Plenty of people are "bilingual" with metric and local. Canadians are universally bilingual with metric and imperial. It's not that hard.

Re: International System of Units overhauled in historic vote

#527
post #452

Earlier quoted context omitted.

Buy an imperial rule. There's some inches that are sub-divided into tenths (maybe 1/20), and others sub-divided into sixteenths (maybe 32nds or 64ths). Often with heavier markings on more significance. For easy division and fractioning of whatever it is you are doing. If it's imperial only (v. rare nowadays) there's usually a coarser scale or two for easier subdivision or when the 16ths and finer just don't matter. B…

As someone who does a lot of woodworking in a metric world: the common fractions (e.g. 1/3) are not a problem at all, they are periodic. Adjusting my saw to 333.33mm or 6.66mm is something I do quite often. If you use fractions often or work with weirder fractions anybody who is worth their grain of salt will build custom temporary rulers or helper systems anyways. And then it won't matter at all if your unit is hype…

> If you use fractions often or work with weirder fractions anybody who is worth their grain of salt will build custom temporary rulers or helper systems anyways.

My point is a system with less need for that because it can handle more common divisions easily would be good.

> I can see how anybody who grew up with inches likes that one better

I tried to be very explicit in that I was not promoting the imperial system. I'm not even promoting imperial distance over metric distance. I'm purely using feet because there's a base 13 for inches to illustrate how a full base 12 system might work. Feet and inches are much worse than metric even in this case because that conversion only happens at one spot, not at regular orders of magnitude.

All I was saying is that since it's a fact there are some things that can be done in base 12 that can't be done in base 10 but not the other way aroubd, it would be really interesting (and extremely unlikely) if we somehow shifted to a base 12 metric-like system. That wouldn't be imperial (which has a different conversion every time you blink).

I learned a lesson though. People are very protective of the metric system. Even opining about fictional future possibilities with mathematical facts will lead to downvoting into oblivion and people misinterpreting clear assertions as something they aren't.

Re: International System of Units overhauled in historic vote

#528
post #384

Earlier quoted context omitted.

> "It cannot perfectly represent the amount" you say, and then perfectly represent the amount. Actually, I said "It cannot perfectly represent the amount (1/3)", so I specifically game an example immediately after the statement of exactly what I was talking about, which you then ignored and used an example for a different item to represent erroneously. What's up with that? > You represent a quarter as the fraction 25…

> No, I represent a quarter as 25/100's to show how it would be accurately represented in metric. 1/4 meter is not pure metric, it's applying a non-metric modifuer to a metric amount. The metric representation of 1/4 meters is 25 centimeters, which is 25/100. What? Fractions aren't exclusive to the imperial system. 1/4 of a metre is metric, just as a 1/4 of an inch is imperial. Everything below is a perfectly legitim…

Fractions are mathematical modifiers that can applied to any quantifiable measurement. That said, I imagine they aren't generally used in professional context in metric, because they generally aren't in imperial either. You don't see architectural plans that say 1-1/2 feet, they say 1'-6". Is it common to see fractional amounts in metric when used in a professional context?

Re: International System of Units overhauled in historic vote

#529

Earlier quoted context omitted.

I think this is exactly the rationale. But, from a more practical perspective... If instead of g/mol, we referred to molecules/g -- we would end up populating tables and charts with really big numbers. This would make lookup tables hard to read, difficult to publish, and hard to work with. Imagine if you had to do math with a bunch of 10^23 exponents all of the time. Instead, it was agreed to effectively pull out a c…

> Imagine if you had to do math with a bunch of 10^23 exponents all of the time. What if it was just set to 10^24 then? Much easier to remember and serves the same purpose. If it was 1 it would work too, since the SI system already has a way to deal with large numbers: prefixes. So we might wrote Ymol for yotta mole = 10^24 mol.

Then 1 mol of carbon-12 would weigh 1300 g rather than 12 g and the conversions would be a pain.

Re: International System of Units overhauled in historic vote

#530

Earlier quoted context omitted.

The imperial system is not good for construction. Try measuring a 2x4 sometime. It's just an established convention. And it sucks.

A 2x4 is cut to 2" by 4" wet and shrinks when it is dried. I'm no huge fan, but this is not an issue with the imperial system.

Uh, no. The final 2x4 product is milled mostly dry. Mills allow the timber to air dry, then mill, then post-kiln, and may mill the final product after that e.g. by cutting 2x4s out of a 12x4. The reduction of a 2x4 from 2x4" to 1.75x3.5" is done on purpose, because modern mills can put guarantees on the density of knots in the wood, thus requiring less wood for the same engineered strength guarantee. So the 2x4" product is not actually 2x4 because the mill is asserting that while there is less wood than just cutting a 2x4, the board they're selling is as strong as a 2x4 would have been at the turn of the 20th century, when they didn't have a way to guarantee the density of knots.
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