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this post was submitted on 12 Mar 2024
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I like watching people dying in this hill, more power to you. I don't necessarily agree, but telling people it's negative anything just to say it's pretty cold is indeed less intuitive to me (and kids don't even know negatives until a bit older).
Only thing is, 100 doesn't need to be anyone's scale, with C I think of it more like a scale from 10 to 40, especially since I live in California, and F is more a scale from 50 to 110. It'd probably help if F really was based on human temps, with 100 being the average temp whenever you measure, instead of 96 to 98.
(An aside, neither are ratio scales. 0 in both cases are arbitrary and a temp of 100 isn't twice as hot as 50. Only Kelvin is like that, which makes it my favorite even if it's never intuitive, haha)
When I was a kid, I learned about negative numbers pretty early on. It was a perfectly normal part of life, since the temp was in the negative a lot of the year. Made sense to me. Temp is below zero? Water is solid. . Temp above zero? Water is liquid. Fahrenheit doesn't make much sense to me, inherently, because I don't have an integral frame of reference, built over decades of familiarity. Celcius on the other hand, it just makes sense!
Sure, negatives aren't hard, nor are decimals. But I should remind you we're talking about a population that wouldn't buy a third-pounder hamburger because they thought a quarter-pounder was more. Fractions are covered pretty early on, too!
Joking aside, if F actually was based on something specific and measurable, it'd also make sense. Then it's just a matter of what you got used to. Granted, human temps vary, so you can't just make 100 the human temp and 0 the temp a human dies, so that's an impossibity. (Water can vary too under circumstances if I remember right, but not quite as much or as unpredictable as some human based metric).
Did it never occur to you that Celsius is basically Kelvin with the zero point moved to human reference?
Human reference because >50% of our body is water. We are essentially water bags.
Yeah, I know. It still moves the zero point and forces it out of ratio, but I prefer it. I know both F and C since I have to use both regularly. F is set to C, too, I think. F = 1.8c + 36, I think?
No, it just moves the zero point, no ratio change: 0°C = 273,15 K / just a simple addition/subtraction.
Colloquially you can also ignore the 0,15 and make it even simpler.
Oh yeah, you're right, it's just Kelvin on a F scale. I shouldn't look at formulas at 2am when I should be sleeping, lol
False. Rankine is too.
I didn't find any others in a quick glance at the wiki, but it would be easy to imagine a scale like 0 at absolute zero, and 100 at the freezing point of water or something.
Never heard of Rankine, but it sounds like a Kelvin with a similar conversation to F (9/5, or 1.8, only inverse). Description suggestions as much, too. If I told students about it when talking about ratio scales, though, pretty sure it'd be a tad too much. Most haven't even heard of Kelvin!
Huh, TIL. That's actually pretty cool. Kelvin moving up the rankings 😅
Haha, I teach statistics and it's usually a tough one walk on. You need a natural zero for ratios, even if the concept is a little weird (like 0 height). 2m is twice 1m, etc. My go to with interval (the non ratio continuous metric) tends to be likart scales. Or yelp stars, or any other arbitrary zero. I do mention temps, though
Makes sense. I always knew Kelvin started at absolute zero, but I don't think I had ever heard of a ratio scale. I'm sure it has some kind of statistical implications about how you can analyze the data right?
Yeah, something like that. Scales of measurement is mostly a formality in undergrad but it does determine eventually what you can and can't do with that scale.