I learned S.I. from the moment I entered school, but since starting university/co-op I've had to familiarize myself with imperial. Being Canadian is suffering since we use a mixture of the two for most industries.
>be American >learn si at the age of 9 >didn't use si regularly until high school physics, so probably 15 years old >love si for /sci/ stuff, but still use imperial units when talking about weather, speed, distance, and weight in non /sci/ settings
>>7765495 It's really not. Human sized objects are measured in cm. Kph is just as readable and actually more precise than mph. One squared meter is roughly the space occupied by 1 sitting person. 100°C is boiling water. 0°C is freezing water, so when the weather temperature is below but close to zero, you know it's probably going to snow. 1L of water weighs 1kg and you should drink between 1 and 2L a day.
The imperial system is retarded and the metric system is just as useful in the everyday life.
And don't get me started with kilobytes being 1024 bytes, another ANSI brainfart.
Computers work in powers of 2. Deal with it. Makes things easier for the people who use it. Same for SI.
Imperial also used to be useful because when it was popularized, it was based on very common things the average person could visualize. I'm Canadian, never learned Imperial officially, always metric. But for some reason the foot and the inch are easier to visualize when estimating things. I generally convert from ft/in to m/cm in my head to estimate height etc.
Though Imperial should be phased out. Having multiple systems is silly, and SI is objectively better. Without being exposed to imperial (parents) I'm sure I'd be thinking in metric just as easily, but without having to know retardedly disproportionate conversions.
>>7765495 It's not though. He even compares mm to ft, which is a completely unfair comparison. That's like comparing miles to cm and saying cm is more useful.
Comparing cm to feet/in then cm are more useful for things like measuring. Especially humans. Why say 4 foot 5 inches when you can say 135 cm? The later is more accurate and in one unit. You can also call it 1.35 m which is STILL more accurate than 4' 5" .
>>7765922 >Computers work in powers of 2. Deal with it. Makes things easier for the people who use it. Same for SI. All that means is that they fucked up calling 1024 bytes a kB, because kB is [math]10^3[/math] not [math]2^10[/math]
>>7765922 >Computers work in powers of 2. Deal with it. Makes things easier for the people who use it. And a genuine consequence of that is that sometimes it is more convenient to display computery things in terms of numbers rounded to powers of two. The operative word here is "sometimes", however; in many other cases you still want plain old powers of ten, even when dealing with things like bytes.
Thus, the reasonable way of dealing with this is to introduce a separate set of prefixes for expressing powers of 2^10 instead of powers of 10^3. Prefixes like kibi and mebi and the like, however autistic they sound. What is certainly the WRONG way to deal with it is to just pretend 10^3 and 2^10 are equal, and conflate them to the confusion of everyone involved. So yeah, ANSI fuckup it is.
I think other (American) anons are choosing to interpret OP's prompt as (when did you learn about ANY of the SI units), as opposed to my preference, (when did you learn about ALL the SI units). But I did learn all the SI units before university, though I've since forgotten some.
It is true that American anons learn about meters and liters in elementary school, but I don't recall learning about the rest until high school, some mix of time from age 15-17, between chemistry and physics. I learned what a mole was near the front of that interval, then I learned derived electrical SI units, and the fundamental one (ampere), and I learned what a candela was at one point but I don't recall ever using that one or being tested on it.
As a matter of fact, I'm going to test my memory cold right now, then I'll look up results.
"There are seven fundamental SI units":
mass: (kilo)gram (okay it's really the kilogram but I always thought that was kind of stupid with reference to the other prefixes, it should really be the gram) length: meter (now defined as 1/299792458 of the distance traveled by light in a vacuum in one second) electrical current: ampere (something about amount of electrical charge flowing per second, maybe. I never really understood why this one was "fundamental"; I had the vague idea that the Coulomb should be the fundamental unit) luminous intensity: candela (defined as some nice even power-of-ten thing when presented itself in terms of other "derived" units) amount of substance (esp. atoms): mole (~6.023x10^23, or the number of atoms of Carbon-12 in exactly one gram of a sample (gram should be fundamental, see?!) time: second (defined in terms of some atom/molecule's somesuch-vibration) frequency: hertz (I guessed this one)
>>7764988 I'm American, grew up in southern California, go to school near the SF bay area now.
We learned SI and the shit American system at the same time. Most my class mates didn't understand why we didn't just use the one that has 10s.
In my highschool physics, math, chem, bio, and comp sci we used SI. Other courses in the humanities usually used American system if they needed to talk about areas of land or distances between places. (Like in history, econ, etc)
>>7764988 So the Americans do learn S.I. in elementary school. Anyone in Canada could go their whole life never seeing imperial but most of us measure our weight and height in imperial. Because of that, I'm stuck thinking of weight in terms of imperial and everything else in metric. That's the remnants of our parents having known imperial. My height is strictly imperial but doesn't affect my notion of length in metric.
>>7764988 Europfag here. Imperial units are much more intuitive. I grew up with the metric system, but if an american asked me how long a foot is I'd know instantly.. by looking at my foot. At the end of the day, it doesn't matter which you use in daily life. They're just numbers that you get used to.
>>7764988 They're usually introduced in middle school and almost exclusively used in science classes in high school (at least for me). SI is used in any STEM field in America, the Imperial system is more for convenience and usually used just for weight, temperature and distance.
I think the problem with the metric system isn't so much the system itself, but the numerical system. It is an outdated system. We developed mathematics to be composed of 10s, because we have ten fingers. But now, people are safely secure and no longer live in a hunter-gatherer society, and as a result, we might want to come up with a different numerical system than the one we currently have.
One that is based on triangles would be sufficient.
I actually wasn't formally taught anything in imperial units (other than conversion factors) until I started taking engineering courses in college. All pure-science courses I took, even going back to middle school, were taught primarily in S.I. >>7766255 Daily life, trades and some engineering.
>>7765059 >All physics in America is taught in S. I. units. >almost every american made physics book has a seperate SI version for the rest of the world or has 50/50 imperial and SI problems Nice try burger
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