Pedantry:
K and °R at agree on 0 K and °C agree on the unit difference °F and °R agree on the unit difference °R and °Ra are the exact same thing (??)
Seriously.
Submitted 2 months ago by ryan213@lemmy.ca to science_memes@mander.xyz
https://lemmy.ca/pictrs/image/3c40502f-8cdd-45d7-9c0d-cac6caea9579.jpeg
Comments
NeatNit@discuss.tchncs.de 2 months ago
Zagorath@aussie.zone 2 months ago
Also Rankine, being an absolute scale, theoretically shouldn’t be in ° anything, and it’s only some weird historical quirk that is the reason it usually is called degrees.
Eatspancakes84@lemmy.world 2 months ago
I am not sure I follow that. The scale is always relative right? It’s just the zero that’s absolute. But that’s also the case with measuring angles where we do use the degree symbol.
fishpen0@lemmy.world 2 months ago
[deleted]NeatNit@discuss.tchncs.de 2 months ago
This screenshot is a little bit hard to see, but from what I can tell:
°RA is pointing at °R and °C
°C is pointing at K and °F
K is pointing at °R and at °F
°R is pointing at °F (and the other gun isn’t aimed at anyone in particular)
°F is pointing at K and at °CEmphasis disproves your claims, sadly. Perhaps there was another way to label them to make it fit, but that’s not what was done here.
RobotToaster@mander.xyz 2 months ago
pruwybn@discuss.tchncs.de 2 months ago
Imagine if some distance measuring system decided their zero was at like 10 feet.
xthexder@l.sw0.com 2 months ago
Let me just shorten this down 8 feet
welds on an extra 2 feet
NeatNit@discuss.tchncs.de 2 months ago
If using log scale, 0 is at -∞
stebo02@lemmy.dbzer0.com 2 months ago
no 0 would be at 1
Empricorn@feddit.nl 2 months ago
I mean, the temperature can be -1. But nothing measures negative.
pruwybn@discuss.tchncs.de 2 months ago
Imagine if it did though.
Revan343@lemmy.ca 2 months ago
Rankine and Kelvin have zero at the same point, which is absolute zero, and should not be used with the degree symbol
This concludes my TED talk
hakase@lemm.ee 2 months ago
According to Wikipedia Rankine is properly used with the degree symbol, but sometimes is not by analogy with Kelvin.
Trev625@lemm.ee 2 months ago
I went down a huge rabbit hole cause of this. I personally like °F over °C but agree it’s arbitrary. So I tried to make a scale that started at the coldest air temp on earth (some day in Antarctica) and went to the hottest day on earth (some day in death valley) and put the coldest day at 0°A and the hottest at 100°A.
Sadly this made a scale that was less precise than I’d like. I like that I can feel the difference between 73°F and 74°F and don’t want to have to use decimals.
So maybe the end points could be only places where people actually live. Well it looks like some people live in Russia around -70°C and some people live in northern Africa around 50°C so if you just take °C and add 60 you can get a -10 to 110 scale where most temps would fall between 0 and 100. Still has the unit difference of °C (which I don’t like) but I like that most temps are between 0 and 100. I also don’t really like negative temperature since it seems wonky.
To “fix” the unit scale you could just multiply everything by 2 so the difference between each full degree is half as much. So temps would be between -20 and 220. °A = 2(°C + 60) °A = 2(°C) + 120
And it turns out I (basically) created the Fahrenheit scale but moved. °F= 1.8(°C) + 32
TL;DR: I’m stupid and this was fun but also a waste of time lol
Gremour@lemmy.world 2 months ago
Celsius is tied to points of of ice melting and water vaporising. Since water is very important for the life on our planet, it makes even more sense that arbitrary chosen meters or seconds.
Agent641@lemmy.world 2 months ago
At sea level. Welcome to La Paz, where the triple point is made up and the freezing point doesn’t matter!
EldritchFeminity@lemmy.blahaj.zone 2 months ago
And similarly, Fahrenheit seems to be tied to the internal temperature of the human body, with 100 degrees being the maximum that the average person can handle before their organs start to be damaged.
nialv7@lemmy.world 2 months ago
does you scale change as Earth warms?
untorquer@lemmy.world 2 months ago
Add a scale revision for each year to the meme
Anticorp@lemmy.world 2 months ago
People live in -70c (-94f) weather? How the fuck do they do that?
untorquer@lemmy.world 2 months ago
Once you’re below -6C or so you just need more insulation. -6C to 10C in many ways can be harder to manage due to humidity, especially in wet conditions. My prolonged exposure experience is only down to -30C. I did not have enough insulation, but an extra base layer, better gloves/boots would have been sufficient. I was fine with fairly light clothing down to -18C. I hear -50C is where it starts to get really harsh again.
Your body also adjusts a lot. In the Summer in wearing a puffy indoors at 10C(50F) but in the winter I’ll go out in a t-shirt at -10C, especially if doing manual labor.
m4m4m4m4@lemmy.world 2 months ago
Never heard about °R and °RA before this meme
rtxn@lemmy.world 2 months ago
It’s the Rankine. Some Scottish dude wanted to use Kelvin without using Kelvin. It’s basically the Fahrenheit scale but with 0˚R set at absolute zero.
0˚R = 0K 1˚R = 0K + 1˚F
NeatNit@discuss.tchncs.de 2 months ago
From what I can gather, R and Ra are the same thing?
ryan213@lemmy.ca 2 months ago
byjus.com/physics/unit-of-temperature/
I had to look out up too!
Morphit@feddit.uk 2 months ago
aaaaace@lemmy.blahaj.zone 2 months ago
Celsius tried to fit too much into 100 notches to please big math.
F is more nuanced with more notches, but the ends aren’t logical. It coukd be shifted perhaps, but how?
If freezing was moved to 0, then water boiling would be 180
Perhaps C could have had a 200 degree range, then it would be closer to F and not so hard to convert.
But also: Scientists are important and we shouldn’t make it too easy, it demeans their work. Maybe make the C scale show water boiling at 183.4521 degrees so scientific calculations are more impressive-looking and respectable.
psud@aussie.zone 2 months ago
and not so hard to convert
“Please change the entire world’s system to make it easier for the one country that uses a different one”
Malgas@beehaw.org 2 months ago
It wouldn’t even change the difficulty, really. You’d just wind up multiplying or dividing by 9/10 instead of 9/5.
Skymt@lemmy.world 2 months ago
The SI unit scales are chosen to fit together to avoid “respectable” scientific calculations.
To heat one milliliter (1 ml) of water one degree Celsius (1 °C) you need one calorie (1 cal) of energy.
Also the dimensions of one milliliter, is one cubic centimeter (1 cm^3), and that amount of water weighs 1 gram (1 g).
Thus 1 liter of water needs 1 kcal of energy to heat up 1 °C.
aaaaace@lemmy.blahaj.zone 2 months ago
I’m aware, taught that in school.
Also aware of the real world, those things don’t mesh the same at altitude.
In theory, reality and theory are the same. In reality, they’re not.
I love science when it’s not treated like a religion.
SapphironZA@sh.itjust.works 2 months ago
It’s not limited to 100 steps. The decimal system gives you infinite granularity.
otp@sh.itjust.works 2 months ago
then it would be closer to F and not so hard to convert.
So few countries use Fahrenheit that this shouldn’t even be a consideration
Reddfugee42@lemmy.world 2 months ago
Comparing arbitrary degrees to absolutes. Notice K is the only one without the degree symbol…
SmoothLiquidation@lemmy.world 2 months ago
Would Rankine not be an absolute?
Xavienth@lemmygrad.ml 2 months ago
It is, but like everything imperial, it is cursed. So it still has a degree sign by convention despite being an absolute scale
stebo02@lemmy.dbzer0.com 2 months ago
yes it used the same zero as Kelvin
StalinIsMaiWaifu@lemmygrad.ml 2 months ago
Which is a fuckup, rankine is absolute scale as well and should not have the degrees mark
saltesc@lemmy.world 2 months ago
When having a beer, I’ve always found it funny that one of the few imperial measurements metric nations kept around, the pint, America went and invented their own. Uncharacteristically a smaller version too.
ryan213@lemmy.ca 2 months ago
Every time I hear, “pint” I think of Pippin saying, “they come in pints?!”
MSugarhill@discuss.tchncs.de 2 months ago
So, here in good ol Austria, when we go to an US/UK/Irish pub and order a pint we always get 0,5L and for a 1/2 pint we get 0,33L.
Knock_Knock_Lemmy_In@lemmy.world 2 months ago
Are half pints half the price of pints? I smell arbitrage.
Zwiebel@feddit.org 2 months ago
The US has their own version of all the imperial units. Also who uses pints except the Brits?
RecluseRamble@lemmy.dbzer0.com 2 months ago
India, I think. But that’s the Brits’ fault too obviously.
Undearius@lemmy.ca 2 months ago
America didn’t really invent their own volume of measurements, they just didn’t keep up.
They used what the British used, then separated from Britain, and didn’t update the units when Britain did.
uienia@lemmy.world 2 months ago
Metric nations havent kept the pint
pingveno@lemmy.world 2 months ago
I just started looking up the different ways to order beers. Wow. Even if it’s based on the metric system, each country really did go and reinvent the wheel.
boonhet@lemm.ee 2 months ago
They haven’t, but some still sell beer by pints. I can go to a store right now (well not right now, it’s past 10 PM) and buy a pint sized beer and a 0.5l beer from the same company.
Puttaneska@lemmy.world 2 months ago
Yes, I think the US pint is 16 Oz (2 cups), whereas the UK pint is 20 Oz (4 gills).
WolfLink@sh.itjust.works 2 months ago
This is more like if you measured altitude by counting from sea level vs the center of the earth vs the top of Mount Everest or something
CileTheSane@lemmy.ca 2 months ago
Vs low tide vs high tide vs tidal average…
I think there are 4 different “tallest mountains on earth” depending on if you are measuring from sea level, how you are measuring sea level, or if you are measuring from the base and the mountain and how you are defining the base of the mountain.
Kolanaki@yiffit.net 2 months ago
0 lbs/lg = Absense of weight.
0 inches/centimeters = Absence of size.
0 Kelvin = Absence of heat.
untorquer@lemmy.world 2 months ago
0lbs is absence of weight, 0kg is absence of mass. Terrestrials, smdh…
azi@mander.xyz 2 months ago
When avoirdupois pounds and pounds-force are used together I’m pretty sure it’s more common to use ‘lb’ for avoirdupois pounds and ‘lbf’ for pounds-force.
LibertyLizard@slrpnk.net 2 months ago
This is why Celsius is the only SI unit that isn’t just wholly better than its imperial counterpart. Both F and C are fairly arbitrary, but in my view F has the slight edge by giving numbers 0-100 in most weather conditions across earth.
Windex007@lemmy.world 2 months ago
But R and K agree on zero
niktemadur@lemmy.world 2 months ago
Meanwhile, Pi and the Fine Structure Constant watching the show, passing each other the popcorn.
Iron_Lynx@lemmy.world 2 months ago
At least Kelvin and Rankine agree on the zero, soooo…
Paradachshund@lemmy.today 2 months ago
FRACK
Fleur_@lemm.ee 2 months ago
I have long since given up on an ideal world where there are universally used standard units. Now I embrace unit chaos. I want my equations to contain fucked up units that are harder to decipher than just doing the calc again. It’s how I artistically express myself.
ma1w4re@lemm.ee 2 months ago
-40F 🤝 -40C
jol@discuss.tchncs.de 2 months ago
Even a broken clock is right twice day.
Ravi@feddit.org 2 months ago
cries in digital clock
ryan213@lemmy.ca 2 months ago
Fun fact!
stebo02@lemmy.dbzer0.com 2 months ago
isn’t it strange how they match up at such an exact number
untorquer@lemmy.world 2 months ago
Funny how the imperial system matches at oddly exact numbers with the metric system… Strange indeed.