Have you ever bought a ton of anything?
Did you put it on the scales and make sure that it was exactly one million grams or go, “yh, that looks like it’s about a ton”.?
That’s why the term ton is popular, the term megagram only really makes sense when you need your “ton” to be precisely one million grams.
I do not think this is a good take. I buy kilograms of sugar, wheat, I measure my body weight in kilograms and I do not need these measurements to be accurate to one thousandths.
And yeah, I have bought a ton of something, coal.
It’s a ton (or metric tonne, fine) because people are just used to it, I wouldn’t have a problem if everybody started using megagrams, but most people wouldn’t even know what it means, especially elderly or people raised with SI but not “getting” SI (“centigrams? do you mean centimeters?”).
It’s just a well known alias, nothing else.
No. Tolerance is tolerance no matter what the unit is. There is implied tolerance but that’s also the same for “one A” and “one B” no matter what A and B are.
Honestly I don’t know what a ton looks like. I’ve bought stuff like gravel and even the guy selling it had no idea. I asked for half a ton which is the legal limit on my trailer and because the skid-loader didn’t have a scale in the grapple he said “I’m just gonna eyeball it”. Then on the scale where they do the payment it showed 2 ton, so I had to manually shovel 1.5 ton of gravel off.
Sure I can visualise a ton of water because it’s such a nice unit, but everything else makes no sense. Cubic metres is a much better measurement to visualise.
Because “ton” was an established amount in trade and shipping (though with significant local variations), that was later adjusted to fit into the metric system and standardized. Hence why people specify “metric ton”. There was simply no need for people to change their terminology when they already had good monosyllable.
Similar to “mile” which in metric countries were brought into the standard and defined to be 10,000 meters. While these days kilometers are almost always used for long distance in all official uses, people’s habits are still to talk about “miles” when describing how far something is to travel. E.g. “I live roughly 2 miles from town” flows better than “I live 22 kilometers from town”.
Edit: Recent example use of metric mile: https://www.nrk.no/tromsogfinnmark/kirkenes-if-og-norild-il-ma-reise-100-mil-for-a-spill-hjemmekamp-i-fotball-nm-1.16338078
You’re half right. There is no “metric mile” at least not officially.
But the reason ton/tonne worked in both is that a metric ton is 1000kg and an imperial tonne works out at 1016kg which is close enough for damn near everyone who weighs shit by the ton/tonne.
But then the Americans and Canadians had to create a stupid hybrid and define the “ton” as 2000lbs (About 907kg)
Thanks for the extra information. But we do have metric “miles” in metric countries. Norwegian spelling, for example, is “mil”. Icelandic is “mìla” Etymology is from the imperial mile, again from latin.
Example from official national dicitonary: https://snl.no/mil
Metric citizin here, nobody uses “miles” here. We just go with the metric system:
1000 metres = 1 kilometre
We use the wording from your example “i live 22 kilometres from town”
That’s fine and I believe that is true for your country or region. Though remember there are other metric countries. E.g. the nordics still stick to it.
Why do we measure fuel consumption in l/100km and not in μm²?
Never heard anyone use megameters either. They either stay on kilometer, or switch to miles. And miles mean different things from one place to the next.
Huh? Why would you switch to miles from kilometers?
And IMHO megameters aren’t used that often because there is rarely anything useful to measure with it. Using a different unit makes you lose your sense of scale (e.g. the earth has a radius of ~7000km, not 7Mm) and for astronomy megameters aren’t big enough most of the time (and you might as well use lightseconds/years because gigameters give no real intuition of scale).
Who switches to miles if they initially use km? They’re the same order of magnitude.
Only in Sweden and Norway.
Denmark used a different mile and it was just as magnificent as our infamous superior number system.
One Danish mile was 12000 alen, where one alen was 2 feet. However the foot was slightly shorter than the English foot.
In total the Danish mile was 7532.48 metres.
Most places aren’t that far away in Denmark, so another common measurement was the fjerdingvej, which was a quarter mile.
Famous scientist Ole Römer made the suggestion to the king to measure all main roads in the period 1691-1698 using this standard. If you walk on old roads, you might find the old milestones placed at the quarter miles. To differentiate the quarter miles from actual miles, they’d have 1-3 holes on the surface.
The whole thing was redone numerous times since then using different scales, where some stones were moved around so it’s completely useless today, but it always makes me happy when I find one.
Megameters are somewhat common in astronomy, for example when describing low orbital hights.
Really? I would have though that they would use the scientific notation in meters, so that the numbers are explicitly clear.
Kilo translates to thousand. Mega to a million. So in you example, kilometer fits perfectly. Megameter would be a million meters, or a thousand kilometers which is annoying to say on the scale we humans use on a day to day basis. And if it comes to space, megameters are way too little.
Never heard anyone use megameters either.
I’ve used it in one specific situation - Physics classes in my freshman Chemistry uni year. The same professor would also use megagrams for weight.
It was mostly so the students got a bit more comfortable converting units back and forth, specially past the 10³~10⁻³ range.
Weird, I’ve never used anything other than unit*10^n on physics. it’s just simpler to operate. 1e3m is 1km, 1e6g a megagram. When working on science, I much prefer the scientific notation.
It looks a bit less cluttered, compare e.g. “40.0 Mm” “40.0 x 10⁶ m” or “4.00 x 10⁷ m”. Plus I think that he took into account that he wasn’t lecturing future physicists but future chemists - in Chemistry you rely on those prefixes all the time, and for most stuff you won’t be changing the order of magnitude too much. (Major exception, pK-whatever)
I brought a shit ton of tacos. Or I have supplied us with a faecal megagram of tacos. You be the judge.
I am shocked by how well your latter example emphasizes an extremely large quantity of tacos.
I vote for that one.
