°RA sound like the sun’s temperature
The heat... I mean the cold... well, it’s palpable!
Submitted 1 month ago by NichEherVielleicht@feddit.org to science_memes@mander.xyz
https://feddit.org/pictrs/image/baa7a500-bf79-4630-abd6-e707513cd7b1.jpeg
Comments
expatriado@lemmy.world 1 month ago
MasterOKhan@lemmy.ca 1 month ago
1°RA = 5500°C / joking
Viking_Hippie@lemmy.dbzer0.com 1 month ago
As far as equations go, “one degree RA equals 5500 degree Celsius divided by joking” is unusually abstract 🤔
ch00f@lemmy.world 1 month ago
-40C=-40 °F
FiskFisk33@startrek.website 1 month ago
huh?
Mass doesnt change with gravity
ramenshaman@lemmy.world 1 month ago
Lbs is not mass, it’s weight/force.
KeenFlame@feddit.nu 1 month ago
And temperature doesn’t change with pressure
expatriado@lemmy.world 1 month ago
no mass multiplied with gravity still results in no force, 0 Lb = 0 Kg; 0 Lbf = 0 N
ch00f@lemmy.world 1 month ago
Yes, but 1kg also results in no force, so it’s a trivial statement.
Linearity@infosec.pub 1 month ago
Gravity? What does that have to do with mass
SpaceNoodle@lemmy.world 1 month ago
Nothing, but it can have a lot to do with force, for which pounds is the US customary unit.
LibertyLizard@slrpnk.net 1 month ago
Kelvin is objectively the most accurate. Celsius fans cope.
NaibofTabr@infosec.pub 1 month ago
Er… every system of measurement is accurate, tautologically.
marcos@lemmy.world 1 month ago
I dunno. I wouldn’t be surprised if somebody took the time to invent fuzzy measurement unities.
LibertyLizard@slrpnk.net 1 month ago
Touché but you know what I mean. It’s the most logical to have absolute zero be zero.
DacoTaco@lemmy.world 1 month ago
I wouldnt call farenheit accurate, but these days it is because its a static number in celcius, which is also an accurate and static measurement that can be repeated billions of times.
Not because 0 is 0 :p
In the original farenheit definition my 0 farenheit was not your 0 farenheit heheapplebusch@lemmy.blahaj.zone 1 month ago
Only Kelvin is valid thermodynamically because thermodynamics often needs absolute temperature for the math to work out right. Rankine is only for masochistic idiots who like fucking up their math and having extra stupid constants all over the place to compensate for their shitty unit system.
Darkassassin07@lemmy.ca 1 month ago
For some reason my brain dropped the ‘L’.
Sitting here wondering how Kevin does it…
frezik@lemmy.blahaj.zone 1 month ago
They’re both calibrated against a stupid wet molecule that carbon based life on this planet is addicted to.
Introducing: the Nihon. 0Nh is the freezing point of Nihonium at 1 bar pressure, and 100Nh is the boiling point. Well, theoretical freezing and boiling points. Nihonium is one of those elements that doesn’t stick around long enough to be studied. But we thought really hard about it, did some shit with particle accelerators, and we’re pretty sure these numbers are good.
FiskFisk33@startrek.website 1 month ago
The bar is defined to be close to the atmospheric pressure of one random planet called earth, why choose that as your pressure unit?
warm@kbin.earth 1 month ago
I'm coping, Celsius is just as accurate as Kelvin, because it based on it.
Kelvin - 273.15 = Celsius
awful_neutral@lemmy.blahaj.zone 1 month ago
It’s a nice day today. Can’t be more than 300 degrees
I’m not so sure
madjo@feddit.nl 1 month ago
Depends on your measuring tool. A thermometer that measures in K but has an error margin of +2 to -2 K is less accurate than a thermometer that measures in F and has an error margin van -0.1 and +0.1 F
Tattorack@lemmy.world 1 month ago
Kelvin and degrees Celsius are friends, though.
burntbacon@discuss.tchncs.de 1 month ago
Not according to the meme. 0 K is -273(.15) C.
dogdeanafternoon@lemmy.ca 1 month ago
I think one is supposed to be radians, not sure why they both have the ° though, cause radians aren’t a degree. Should be just R the way Kelvin is just K.
Bob@feddit.org 1 month ago
It is clearly the Rankine scale, which is an absolute temperature scale just like Kelvin. Which means that 0 K and 0 °R is exactly the same, and the meme doesn’t make a lot of sense.
ChicoSuave@lemmy.world 1 month ago
Fahrenheit is vibe temperature. It just feels good use bigger numbers to describe being very hot. “It’s 30 degrees outside” sounds hot but “it’s 100 degrees outside” is more expressive, like built in exaggeration. That could be why it is preferred by Americans.
warm@kbin.earth 1 month ago
Farenheit isnt a vibe temperature, its just a bullshit unit of measurment that stuck around in the US.
If you wanted a vibe temperature, why not have 0 be comfortable room temperature and then negatives be colder and positives be warmer?
Or just use Celsius like the rest of the world.
SapphironZA@sh.itjust.works 1 month ago
They are called Canadians. The scale works like that for them.
SpaceNoodle@lemmy.world 1 month ago
No, it’s just because the US never really converted to the metric system. Degrees Fahrenheit are zeroed at the freezing temperature of brine, and there are exactly 180 degrees from freezing to boiling water because that was an easy number to divide (like the 360 degrees in a circle).
eletes@sh.itjust.works 1 month ago
But really it’s because when you’re used to big numbers all your life, why would you limit yourself to puny smaller numbers
Tolookah@discuss.tchncs.de 1 month ago
30 degrees outside feels very acute.
MisterFrog@lemmy.world 1 month ago
This is an argument that gets rolled out a lot but the argument is also based on vibes.
Celcius having zero at freeing is actually useful with weather.
100 being boiling, is also nice for cooking.
The rest is arbitrary, and cope from US customary users who can’t accept that metric is the same or better in every single way.
omxxi@feddit.org 1 month ago
Would be better ordered like F° C° K° R°
0_0j@lemmy.world 1 month ago
You mean K° F° C° Repeat°
MisterFrog@lemmy.world 1 month ago
Found the Americans.
I kid, but it’s °C, not C°
And K had no degrees at all.
The other two units are not mentioned in this household.
Iron_Lynx@lemmy.world 1 month ago
there’s a whole host of temperature scales, some of which look similar, some look different, some scale the same at the same temperature difference but have different zeroes, and at least one works backwards. Thank goodness there’s only three you’re likely to see in the wild these days, I’d hate to have to keep in mind whether or not those degrees are not Celsius or Fahreheit, but… idk, Newton? Réamur? Rømer? Delisle?
KittyCat@lemmy.world 1 month ago
More like only 4 than 3, at least in the us, I unfortunately run into Rankine at my job on occasion.
user224@lemmy.sdf.org 1 month ago
Welp, it is like Kelvin, just with Fahrenheit step.
sirico@feddit.uk 1 month ago
Use molecular wiggles mw
ArmchairAce1944@discuss.online 1 month ago
I know the F C and K, but what are the others?
burntbacon@discuss.tchncs.de 1 month ago
R is to F what K is to C. Ra is used sometimes because there are other R meanings.
Philharmonic3@lemmy.world 1 month ago
Interval vs. Ratio
FelixCress@lemmy.world 1 month ago
From John Bazell “In metric, one milliliter of water occupies one cubic centimeter, weighs one gram, and requires one calorie of energy to heat up by one degree centigrade—which is 1 percent of the difference between its freezing point and its boiling point. An amount of hydrogen weighing the same amount has exactly one mole of atoms in it. Whereas in the American system, the answer to ‘How much energy does it take to boil a room-temperature gallon of water?’ is ‘Go fuck yourself,’ because you can’t directly relate any of those quantities.”
BastingChemina@slrpnk.net 1 month ago
I was in a situation similar to this one in real life: having to adjust the salt level in a pool.
In metric:
The pool is 8*4 m long and 2m deep on average, the current salt level is 2g/l and the salt comes in 20kg bags.
How many bags of salts do I need to pour in the pool to adjust the salt level to at least 3g/l ?
Answer:
In imperial:
The pool is 20*10ft long and 5ft deep on average, the current salt level is 2000ppm and the salt comes in 40lbs bags.
How many bags of salts do I need to pour in the pool to adjust the salt level to at least 3000ppm?
Answer:
rumba@lemmy.zip 1 month ago
Home pools here are almost never saltwater.
We simply add chlorine tabs until the pH is the correct color on the strips. Even if we knew it would be 62.4 lbs of salt, it’s not like you can buy a 62.4 lb bag of salt.
But yeah, it is a lot harder to do applied math in the US, which is why science here went metric :)