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1021
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Hard core Kelvins! (i.imgur.com)

submitted ago by drakche

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[–]rockthelaxwand 168 points169 points ago

wouldn't 0 K be "perfectly preserved"?

[–]Freddicus 132 points133 points ago

0 K would be more like "Everything in our universe ceases to exist". If I understand it correctly, it would mean that there is no movement atomically or even subatomically, because any movement whatsoever would create "heat". So if the temperature ever reached 0 K, there would have to be 0 Energy in the universe. Which is why we will never reach 0 K. It's kind of like how c is the universal speed limit (kind of).

[–]Glalie 127 points128 points ago

This is false. well absolute zero is impossible, but even if you could get there,there is still zero-point energy so there would still be some movement. putting aside thermodynamics, you still have quantum fluctuations that are just intrinsically quantum mechanical. in a sense its just "built in to the system". so there would still be movement.

[–]7tacoguys 59 points60 points ago

I have a friend who took a Modern Physics class and he was telling me basically that. At 0K, electrons would still be spinning. It blew my mind.

[–]Glalie 37 points38 points ago

yep its true. you may like this video

[–]solargatorade 15 points16 points ago

I love the different "oh god, where do I begin" faces th scientists make.

[–]JimJonesIII 5 points6 points ago

Love the accents in this.

[–]pr0dukt_ 1 point2 points ago

"This is the beauty of looking out in Astronomy. We are not only looking out at distance but also back in time."

Maybe not his exact words as I can't understand it that well but things like this just give me this shiver and a huge smile on my face.

load more comments (6 replies)

    [–]Dihedralman 11 points12 points ago

    Spinning is not "spin" or classical motion whatsoever and quantum fluctuations unfortunately raise the temperature as the temperature is defined as the state when there is no entropy- only one state allowed, thus P=1, no fluctuations.

    [–]Tylensus 4 points5 points ago

    The dictionary didn't help me any. What is entropy in layman's terms?

    [–]EJR94 14 points15 points ago

    Chaos.

    [–]zoidbergism 4 points5 points ago

    This is sorta right, isn't it? Entropy is the measure of the amount of chaos in a given system. For example, a glass of water would have higher entropy than the same amount of iron. A hot glass of water has more entropy than a cold one, etc. Fun fact: Consider the universe as one big system and everything in it as part of the system. The entropy of the universe is forever increasing. There is a max value though. Once entropy of the universe reaches this max value, it is undertood that the universe would be in thermodynamic equilibrium i.e. every atom in the universe would be at the same temperature and there would no longer be any heat transfer. This is called the heat death of the universe.

    [–]Thinks_Too_Logically 2 points3 points ago

    There's not really a true "max" value of entropy. If the universe is infinite in energy, there's no limit to how disorderly the universe can become.

    [–]b0w3n 2 points3 points ago

    Hmm I've never considered this, but just from a layman's perspective it seems like entropy would be roughly the same in those systems as we're talking about states of matter and not heat death? Since you're not introducing or taking away heat, they would decay into entropy at the same state, so you boiled a pot of water and start measuring entropy at that point.

    But the mere fact of boiling means you're adding energy to the system.

    I know nothing about physics and it makes me sad.

    [–]Thinks_Too_Logically 1 point2 points ago

    The fact that the iron is solid means there are fewer arrangements the iron's atoms can be in at any given time than the liquid water. Thus solid iron has a lower measure of entropy than water.

    [–]BeardedBuddha 0 points1 point ago

    See that's the point of entropy. You cannot add or remove energy from the system. You can only move energy around.

    Energy is constantly moving around, but energy is never added to the universe, nor does it get lost. But all systems seek equilibrium, and so does our universe. So at some point, it will reach that equilibrium and everything will just be grey and cold. All the stars burned out, all the matter neatly scattered uniformly throughout the universe. All energy condensed down to matter.

    edit: I just reread your comment and realize I didn't read it properly the first time. I do not believe the above solves any of your questions. To be honest I'm not sure I do understand what you're asking. Please rephrase and we'll try our best!

    [–]9bit 5 points6 points ago

    No one else gave a scientific definition. Entropy is given by the formula S = k log W. k is just Boltzmann's constant, which serves to relate the rest of the equation to our system of units.

    W, the weight, is a bit more complicated. We speak of entropy being a property of macrostates. A macrostate of a system is defined by its macroscopic properties. So if we had water, we could specify that we had 1 kg of water at 298 K with external atmospheric pressure of 1 atm, and that would define a macrostate. We like to think in terms of macrostates because they are the things we can observe.

    Now, consider a microstate. The microstate of a system specifies everything about the system, including all microscopic information. Under classical mechanic, for our kg of water, this would include specifying the position, momentum, angular momentum, asymmetric bond stretch, symmetric bond stretch, and bond bend of each water molecule. (When using quantum mechanics, things are different, as a lot of these value don't exist simultaneously because of the uncertainty principle, however, it also makes the notion of a discrete state easier to define. Luckily statistical mechanics works well under both quantum and classical mechanics.) This is an absurd amount of information, way more than we could deal with directly, so we use statistical mechanics. What we do is specify a macrostate, then "count" the number of microstates that would give that macrostate. This is the weight, a unitless number, and the W from the equation S = k log W.

    The reason for the log is we want entropy to be extensive, i.e., if we have two systems of 1 kg water at 298 K with atmospheric pressure of 1 atm, we want the total entropy to be double that of one system. Because a state for the overall system is one state from each of the two subsystems, the weight is the product. The function that takes a product to a sum (f(a*b) = f(a) + f(b)) is the logarithm.

    [–]Tylensus 1 point2 points ago

    Fascinating. This brings up 2 more questions.

    1) How do atoms seemingly teleport?

    &

    2) What is the unit of measurement for entropy?

    [–]9bit 3 points4 points ago

    I'm not sure what you mean by your first question.

    For the second, entropy is measured in units of energy divided by units of temperature, usually J/K. But this is kind of deceptive. Entropy and energy are the fundamental concepts, and temperature is derived from them. However, temperature was discovered and given units first, because it is easier to observes. Therefore, the unit for entropy is derived from the unit for temperature, even thought conceptually, it's the other way around. The definition of temperature used in in statistical mechanics is T = dE/dS. Like a lot of things in statistical mechanics, it's easier to think about in terms of inverse temperature. 1/T = dS/dE.

    How does this weird equation capture the standard notion of temperature? Well, the fundamental idea of temperature is that is defines the direction of heat transfer. If a hot thing and cold thing are touching, energy in the form of heat always goes from the hot thing to the cold thing until the temperatures are equal. Entropy by definition always increases in a spontaneous process. Since temperature is always positive for any system you'll encounter in real life, taking energy away from a system always lowers the entropy. If we take dE energy away from the hot system, its entropy decreases by dE/T1. If we give that energy to the cold system, its entropy increases by dE/T2. Therefore, the total change is dE/T2 - dE/T1 = dE*(1/T2-1/T1). If this is positive, the total entropy goes up. Since T1 > T2 > 0, 1/T2 > 1/T1, so this quantity will be positive, so our definition of temperature captures the fact the heat flows from hot to cold.

    Edit: What agrif says is also correct. The concept of entropy originates with the 19th century chemist Ludwig Boltzmann, who worked out the details as they relate to statistical mechanics. Since then, the concept has been adopted and expanded by information theorists and computer scientists. They talk about if differently (units of bits. S = -Σ p log p, where p is the probability of each configuration), but the idea is essentially the same.

    load more comments (5 replies)

      [–]Pickledsoul 2 points3 points ago

      entropy is like a clean bedroom: it gets messier and messier over time. Enthalpy is heat/movement.

      [–]everyday847 0 points1 point ago

      There is relative stability inherent in a disordered system because more available paths take systems out of order than into it. So probabilistically, over time, systems stabilize / increase entropy.

      [–]JewboiTellem -1 points0 points ago

      Entropy is destruction of structure. So water in a cup has less entropy than water on the floor, which has less entropy than gas form, which has less entropy than the entire house being demolished and laying there, which had less entropy than the entire world being broken apart, which has less entropy than everything in the universe being broken apart, which has less entropy than every quark of every atom in the universe being as far apart and equally spaced from each other as possible.

      Basically, the closer you are to the end-game with every piece of matter in the universe being as from from each other as possible, the more entropy it contains.

      [–]rockthelaxwand 0 points1 point ago

      increments of "disorder" in a system, availably or lack there of to do work

      [–]Thermodynamicist 0 points1 point ago

      Entropy is effectively a measure of the probability of the configuration of a system (improbable states have low entropy; probable states have high entropy); the second law of thermodynamics effectively states that systems tend towards their most probable macrostate over time.

      load more comments (4 replies)

        [–]face_to_palm 1 point2 points ago

        I read that as an angry OK not 0k.

        [–]silent_p 1 point2 points ago

        At 0K, everything will be OK.

        [–]serux 6 points7 points ago

        Yep. Mhm. I understood some of those words.

        [–]Landao90 0 points1 point ago

        In any case, I do believe the closest we have gotten is liquid helium.

        [–]JustSomeD00d 0 points1 point ago

        Yeah fucking science! Bitch!

        [–]ThatCrankyGuy -1 points0 points ago

        Well I'll have you know that quantum mechanics is just some mumbo jumbo nonsense. We're talking practicality here.

        [–]melthornal 0 points1 point ago

        What you just said is outside the realm of science. There is little to no reason to believe it is true.

        [–]Thermodynamicist 0 points1 point ago

        putting aside thermodynamics

        One does not simply "put aside" thermodynamics.

        [–]bonkatomicpunch 0 points1 point ago

        I know some of these words

        [–]Denies_Errything 14 points15 points ago

        I'd introduce the theory that Absolute 0 would be 'Stopped in time'. Neither dead nor alive.

        Quite. (Dons Monocle)

        [–]drewpus 10 points11 points ago

        I'd respond to that theory by saying that Absolute 0 would be "Stopped in time with the same state as prior to achieving Absolute 0." It'd be hard to get to Absolute 0 without dying first.

        [–]Denies_Errything 9 points10 points ago

        It'd be hard to get to Absolute 0 without dying first.

        As long as we've agreed that it isn't impossible. Okay.

        Look at these:

        ( . Y . )

        Have a nice day.

        [–]FlyingPasta 1 point2 points ago

        How is it not impossible? I don't think there is a way to stop subatomic particles from moving. We can't take that energy away, we can only add to it.

        [–]juusukun 0 points1 point ago

        ...and defies the LAWS of physics something a sound theory never does.

        [–]astronoob 0 points1 point ago

        That's correct; not moving means that you're not moving.

        [–]juusukun -1 points0 points ago

        well if you stop time then you stop vibrations meaning everything would be at that one instant at absolute zero, and things like gravity would cease to exist. however they would still have masses and volume so they would be lacking the rest of the attributes that show us that the temperature of matter is as close to absolute 0 as we have ever observed.

        as for scientifically stopping or reversing time, it has little to do with temperature. and your "theory" only works in a universe where there is no gravity and ALL time stops rather than just bubbles here and there, since space-time is anything but uniform.

        [–]Take_Boat 0 points1 point ago

        Life is a process, if it's not ongoing you're not alive.

        [–]McBurger 2 points3 points ago

        Did you hear about the guy who chilled himself to absolute zero?

        He's 0K now.

        [–]mountaincyclops 2 points3 points ago

        What about in a perfect vacuum where there is no particles to vibrate?

        [–]AltoidNerd 1 point2 points ago

        The universe has a mean temperature of 2.7K due to the ambient energy density. It is possible to locally get much colder than this, in labs. Theoretically, it is undecided if 0K can be reached locally.

        Temperatures of microkelvins (~10-6 K) are achieved at University of Florida 30 feet underground. My feeling is it's probably impossible to get 0K anywhere, but its really a toss up right now.

        [–]rockthelaxwand 1 point2 points ago

        i meant theoretically, but thank you, that does make sense, thermodynamics and what not

        [–]Khalku 1 point2 points ago

        Microwave cosmic background accounts for 2.7K in the vacuum, which is probably a cause of the entropy as you say.

        [–]goomplex 0 points1 point ago

        So 0K is a perfect vacuum?

        [–]lydocia 0 points1 point ago

        -snicker-

        OK.

        [–]solargatorade 0 points1 point ago

        Perfectly preserved as gray goo, yes.

        [–]Thermodynamicist 0 points1 point ago

        0 K is a meaningless concept; you can't get there because of the 2nd Law.

        load more comments (9 replies)

          [–]LeMAD 38 points39 points ago

          300K: just fine.

          [–]infamousnowman 28 points29 points ago

          What? No love for Rankin? Americans have an absolute temperature scale too! We just never really use it. For anything.

          [–]TheSemiTallest 17 points18 points ago

          I remember asking my high school Chemistry teacher if there was a Fahrenheit equivalent to Kelvin. She had no idea. Thanks to the magic of the internet, I was able to learn about the Rankine scale, and tell her about it.

          I have never used it. For anything.

          [–]I_am_the_cheese 9 points10 points ago

          Rankine cycles! Thermodynamics classes are the only time I've ever used it.

          [–]mitt-romney 8 points9 points ago

          American here. We did all our Rankine cycles in Kelvin.

          [–]TheSemiTallest 0 points1 point ago

          I either didn't take enough thermo to learn about those, or I just didn't pay enough attention to my professor. Needless to say, I did not pass my thermo class.

          I did learn, though, that my professor said everything should be measured in toasters; and that you could live for a year off a barrel of oil (but it would taste pretty gross).

          load more comments (7 replies)

            load more comments (3 replies)

              [–]Maxxonry 76 points77 points ago

              Anyone seeking more info might also check here:

              title comnts points age /r/
              Temperature range 1com 3pts 13dys funny
              In defense of Fahrenheit 449coms 1268pts 1dy geek
              Why I prefer Fahrenheit to Celsius [Fixed] 1857coms 1138pts 3mos funny
              Now I know exactly how Kelvin works. 1com 15pts 26dys funny

              source: karmadecay

              [–]SpaceMonkeysInSpace 33 points34 points ago

              Yea, I remember seeing this shit yesterday. For shame op.

              [–]hydrogenous 6 points7 points ago

              Literally yesterday. It's weird that the only one to mention it was a bot. Pathetic plebeian casual redditors...

              [–]McBurger 1 point2 points ago

              It's not a bot. You can search for it on karma decay, then it will give you a copy paste box to

              [–]YawnSpawner 0 points1 point ago

              In OP's defense, not everyone subscribes to /r/geek. But I do and shame on OP!

              load more comments (4 replies)

                [–]MPeytz -1 points0 points ago

                you missed /r/Metric

                [–]Kalidor1 54 points55 points ago

                In Canada we use nothing but Celsius and it works well for everyday talk about temperatures. If someone says it is 24 degrees C outside it makes perfect sense that it is a nice summer day. It is whatever system you are used to using. We also have a good grasp on Fahrenheit as well, lots of thermostats from America are in Fahrenheit or both. Also all hot tubs are in Fahrenheit up here.

                [–]jsosnicki 68 points69 points ago

                In Canada

                Go on...

                nice summer day

                Nope not buying it.

                [–]wazooasiteverwas 39 points40 points ago

                I hear in Canada they have two seasons, winter and July.

                [–]Jaerdo 9 points10 points ago

                Two seasons here in Alberta: winter and construction.

                [–]omers -1 points0 points ago

                You stole that joke from Saskatchewan and you know it... and we stole it from Manitoba.

                [–]chingyduster 6 points7 points ago

                Depends where you are. The last few years in Southern Ontario, have been warmer than usual. We haven't seen a decent snowfall in a few years.

                [–]pdb01 1 point2 points ago

                Be careful what you wish for.

                [–]ThaneAquilon 2 points3 points ago

                Its motherfucking cold in Winnipeg, or summer, and motherfucking hot. And construct-y.

                Edit: We have the same climate type as Siberia.

                [–]JDog131 0 points1 point ago

                out in calgary mother nature can never decide what season to stick with for more than a week

                [–]kisses_and_nudity 1 point2 points ago

                Summer in Toronto is hotter than summer in LA. For months. Now you know.

                [–]Awfy 0 points1 point ago

                Scotland is the same, winter and that one weird fucking Monday in November...

                [–]Upper_Cunting 0 points1 point ago

                This Sterotype is ridiculous, I'd comment more about our 4 seasons if the power lines weren't frozen and damaged. via mobile

                load more comments (6 replies)

                  [–]CaptInsane 6 points7 points ago

                  England uses a weird mix of both (I'm American, live in America, but lived in England 6 months and watch a lot of Top Gear). From my experience, they measure long distance in km, speed in mph, and weight in kg or stone (which is 14lbs). The odd one, at least on Top Gear, is they use "torque" as a unit of measure: they'll say a car has 400 torques, instead of 400 ft-lbs of torque or 400 newton meters of torque (don't know the conversion or abbreviation for newton meters)

                  [–]Frostywood 7 points8 points ago

                  We use miles for distance, miles per hour for speed, (usually) stone for our weight, kg for weight of things/food and the torque one is just because barly anyone actually knows what it is so they just compare them to other cars and vehicles and calling them torques is easier than ft-lbs of torque to say.

                  [–]CaptInsane 4 points5 points ago

                  I like how on Top Gear they'll show a speedometer in km/h, and the host will say how many mph that is.

                  Any idea, though, why you still use such an archaic weight for people? I would imagine not many people know hot to convert it

                  [–]Phate18 2 points3 points ago

                  Because their government wasn't decisive enough to implement the SI system when it started becoming wide-spread, albeit to a much lesser extent.

                  It only takes one generation to make the change, really.

                  [–]Frostywood 1 point2 points ago

                  Exactly haha, and my granddad still uses yards, feet and inches for everything whereas my dad uses meters so it seems like they changed some but not all.

                  load more comments (4 replies)

                    [–]Frostywood 1 point2 points ago

                    Yeah it makes me laugh too i suppose its because most other countries use km/h its just us that are awkward haha but I'm really not sure why we still use such outdated measurements for something's and not for others.

                    [–]noodleboy200 0 points1 point ago

                    Well a stone is just 14 pounds so it's not too different to how Americans weigh themselves.

                    [–]kungtotte 0 points1 point ago

                    400 newton meters (Nm) is about 295 ft-lb.

                    Also they don't really use "torque" as a unit of measure, they are saying that the "torque is 400" and that implies whichever unit they use (I'm guessing Nm). It would be the equivalent of saying the car's "power" is 300 or whatever as opposed to saying it has "300 brake horsepower".

                    [–]CaptInsane 3 points4 points ago

                    Well, maybe it's just the show. The hosts will say a car has "400 torques" and "300 brake horsepower"

                    [–]Jaerdo 0 points1 point ago

                    The torque thing is just an abbreviation that car guys use all over the world. How many torques something has means how many ft-lbs of torque.

                    [–]HARSHING_MY_MELLOW 0 points1 point ago

                    http://www.wolframalpha.com/input/?i=1+foot+pound+torque+in+newton+meters

                    [–]spock_block 0 points1 point ago

                    When they say torques, they are just being idiots and think that because a car can have horsepower, it also has "torques". Pretty sure all the numbers they give are Nm (sound like it anyway)

                    [–]guywhoishere 7 points8 points ago

                    Cooking is also normally done in Fahrenheit in Canada.

                    [–]BardtheBowman 3 points4 points ago

                    Yeah, my stove/oven is in F but has a conversion chart. I don't understand why they don't just put two rings around the knobs like cars have for km/h and mph. And then my freezer is in C but the fridge part is in F. Same appliance. I don't fucking understand.

                    [–]gilbertsmith 2 points3 points ago

                    We've only been metric since the mid 70s. There are tons of people up here who grew up with imperial measurements and barely have a grasp on metric outside of things like speed limits and small liquid measurements (milk, etc).

                    People my age (early 30s) grew up with parents or siblings who were raised on imperial and only half-heartedly taught metric in schools, and we were taught metric by teachers who themselves barely had a grasp on it. As a result, I work on this weird hybrid measurement system. I couldn't tell you my height or weight in metric, but I can't tell you how fast I'm going in imperial without looking at the gauge. I don't know how much a gallon is, and I don't know temperatures in fahrenheit.

                    Let's see..

                    • My oven is in Fahrenheit, but indoor/outdoor temperatures are in Celsius.
                    • My bathroom scale is set to lbs.
                    • Height is feet and inches.
                    • TV/monitor screens are measured in inches.
                    • Speeds and distances are in kilometers per hour, but the roads are laid out at one mile markers.
                    • Gas, drinks and other liquids are in litres or millilitres.

                    [–]icantthinkofagoodnam 1 point2 points ago

                    That's clever, so you don't have to wait so long for the water to reach 100° to boil!

                    [–]KiXpiX 10 points11 points ago

                    I like Celsius. 0 degrees c = Freezing point, 100 degrees c = boiling point.

                    [–]Thenemesis90 6 points7 points ago

                    You don't say ?

                    [–]Khalku 0 points1 point ago

                    But he just did say!

                    [–]Canadian_Tardis 11 points12 points ago

                    Having to learn the Fahrenheit to Celsius conversions is the unfortunate curse of living so close to the U.S.A. In conclusion; Metric System > Imperial.

                    [–]TheAethereal 0 points1 point ago

                    We use Fahrenheit in the US, but I'd much rather use Kelvin for everything. The idea of negative heat is just stupid.

                    [–]SOPA_NO 0 points1 point ago

                    In Canada if you say 24 degrees F outside it's considered a nice summer day.

                    load more comments (1 reply)

                      [–]Sniter 21 points22 points ago

                      i thought it was (at sea level) 0°C = water frozen 100°C = water boiling

                      [–]pajam 17 points18 points ago

                      Yup. 0°C (32°F) is freezing point. 100°C (212°F) is boiling point.

                      [–]mcanerin 1 point2 points ago

                      Yeah on this chart in Celsius it's:

                      0 = Cold, and 50= hot.

                      load more comments (4 replies)

                        [–]twolegsoneshot 3 points4 points ago

                        0 °C fairly cold? WHAT ARE YOU? A PENGUIN?

                        [–]omegashadow 3 points4 points ago

                        I dunno I walk around in a t-shirt for short periods of time at 0°C. What are you a chinchilla?

                        [–]DarkSpoon 0 points1 point ago

                        I almost put a light coat on this morning because I got a chill. It's 60F out and a bit breezy. I blame it on losing a substantial amount of my insulating fat.

                        [–]EntForgotHisPassword 0 points1 point ago

                        Think it was -10°C today where I live.. I finally had to bring out my winter-coat.

                        [–]olympic_lifter 10 points11 points ago

                        100°C air temperature is not dead. That is a happy and toasty sauna temperature.

                        It might be dead for Canadians, though.

                        [–]OutlawBlue9 3 points4 points ago

                        Thank you. While there were some nice conversations about whether 0K is possible or not I was surprised no one mentioned that saunas are frequently 100C. Speaking of which I need to hit the gym and use mine...

                        [–]phliuy 0 points1 point ago

                        you'll be dead eventually, and much faster than at 100F or 0 C

                        [–]olympic_lifter 3 points4 points ago

                        Not from blood boiling or anything like that, just dehydration (not like you can drink water). 100K would be a more... instantaneous death.

                        [–]UncleFace 8 points9 points ago

                        Kelvin and Hobbes

                        [–]jesfunshinebear 12 points13 points ago

                        KELLLVIIIIIIIIIIIN!

                        [–]Mikuro 6 points7 points ago

                        This is false. Finnish saunas can go up to 100°C, and you do not die in them.

                        I couldn't believe this at first, but it's true.

                        [–]florinandrei 2 points3 points ago

                        Well, it's not indefinitely survivable. You have to get out of there after a while.

                        I've been in a sauna at that temperature. Spent about 30 minutes there. No problem.

                        [–]maciakl 1 point2 points ago

                        Here is the real comparison:

                        • Celsius - designed to be elegant

                          • Water freezes at 0, boils at 100

                        • Kelvin - designed to make science easier

                          • Hey, lets make 0 to be the lowest possible temperature in this universe, so that we never have to deal with negative values in computations.

                        • Fahrenheit - antiquated and arbitrary

                          • Water freezes at 32, boils at 212, 0 is the freezing point of brine (?!) and the scale was designed in such a way that it would be "easy to mark" on existing instruments.

                        From Wikipedia:

                        According to a letter Fahrenheit wrote to his friend Herman Boerhaave, his scale was built on the work of Ole Rømer, whom he had met earlier. In Rømer's scale, brine freezes at zero, water freezes and melts at 7.5 degrees, body temperature is 22.5, and water boils at 60 degrees. Fahrenheit multiplied each value by four in order to eliminate fractions and increase the granularity of the scale. He then re-calibrated his scale using the melting point of ice and normal human body temperature (which were at 30 and 90 degrees); he adjusted the scale so that the melting point of ice would be 32 degrees and body temperature 96 degrees, so that 64 intervals would separate the two, allowing him to mark degree lines on his instruments by simply bisecting the interval six times (since 64 is 2 to the sixth power)

                        [–]Take_Boat 1 point2 points ago

                        Fahrenheit - Good for describing temperate climates. In most of Europe and the US days above 100 or below 0 are rare. Even the hottest regions don't go above 110 often. (Cold places go really low, though.)

                        [–]jonathanrdt 7 points8 points ago

                        Fahrenheit is the human scale, covers most temperatures you are likely to experience.

                        Celsius is the water scale (at 1 atmosphere).

                        Kelvin is the universal scale.

                        [–]FreeBribes 6 points7 points ago

                        Fahrenheit is kind of the water scale too... the zero point of his scale was the coldest Mr. Fahrenheit was able to achieve water in liquid form with the assistance of other chemicals available to him at the time; I'm going to guess some blend of salts.

                        Then he took water at freezing and boiling, and set them 180 degrees apart.

                        [–]jonathanrdt 0 points1 point ago

                        It would have made more sense to make 0 ice and 180 boiling water.

                        0-180 is at least akin to the logic of the Celsius scale.

                        Nah you know what: it's all kind of arbitrary now that I think about it. He was trying to find the coldest temperature to use for zero; he just couldn't get there. He'd have preferred Kelvin to Celsius, I suspect.

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                            [–]gaatar 9 points10 points ago

                            0 degrees Celsius is not "Fairly cold". Jeebus. It's more, slightly chilly.

                            [–]spektre 7 points8 points ago

                            Yeah, 0°C is cool. You can walk a couple of blocks in T-shirt and jeans.

                            -5°C is perfect winter temperature, the snow on the ground is frozen so it doesn't soak your shoes.

                            About -20°C is when the trees starts to really glisten with snow crystals and on a sunny day everything looks magical. Unless you're in a city, because by then all the snow close to roads have taken on a brownish-black color and all the dogs have peed and shit everywhere decorating the few white parts with a rancid yellow color. It's also too cold for the dog owners to bother holding up to pick up the shit.

                            -30°C is when you're really getting bothered by the bus not showing up on time so you have to stand there a couple of minutes more.

                            [–]ed1989 14 points15 points ago

                            I have no idea where you live, but where i live, if it is 0ºC no one that is sane would walk around in only a T-shirt.

                            [–]spektre 4 points5 points ago

                            Sweden! And I didn't say walk around, but if you're just going to the store and back just a T-shirt isn't such a big deal.

                            [–]Tikem 3 points4 points ago

                            And here I was going to give you a nice Finnish high five. Then I noticed you are Swedish and I went to sharpen my puukko. THEN, I realized that we guys aren't really that different and went back to the high five state.

                            [–]spektre 0 points1 point ago

                            Well, I've got a bit of Finnish blood in me too, so you can feel safe dealing out high fives!

                            It's not like we're Danish.

                            [–]AriBBCP 0 points1 point ago

                            southern ontario and people do it

                            [–]MrJCen 0 points1 point ago

                            I live in California and that sounds insane. I bust out my sweaters when it get ~70F (24C). How hot does it get where you live?

                            [–]omers 1 point2 points ago

                            As someone from Sask I concur with this assessment... However I would also put -20 at "perfect winter temperature" provided there is no wind.

                            We can hit -50°C to -55°C some days during the winter here (wind chill factored) and it's fucking unpleasant.

                            [–]Ollari 1 point2 points ago

                            I'm from Finland, -30°C happens almost every winter. Just wear enough warm clothes and you will be fine!

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                              [–]silver_pear 2 points3 points ago

                              I think you'll find that very subjective. Here in Queensland, 0°C is deathly cold (we never have snow or anything similar).

                              35°C in the summer is no big deal to us however so I guess we're somewhat of an inverse to you.

                              [–]gaatar 0 points1 point ago

                              I suppose so, and I can understand why some people aren't used to the cold. I vacationed in Florida one Christmas, and it was at least 25 degrees everyday. Up here 35 degrees for most people is the day you schedule around so that you don't have to spend much of it outside. Although I still manage to wear pants most of the summer.

                              [–]Villain_of_Brandon 0 points1 point ago

                              0 degrees Celsius? Time for a Slurpee.

                              [–]SOPA_NO 0 points1 point ago

                              My brother made the OP (like, the OC, not the repost) of this, he had to dumb it down from "the temperature is slightly below satisfactory", because that's how he talks.

                              [–]Take_Boat 0 points1 point ago

                              0ºC/32ºF is the border between chilly and cold. Above it, long-sleeve shirts are fine and once it dips below you know it's time to hang your heavy jacket by the door.

                              [–]Kickmekicku 10 points11 points ago

                              Repost

                              [–]Asdayasman 2 points3 points ago

                              Hardcore wars going on in here.

                              My way of describing it is better.

                              "It's fucking cold" - Wear 4 shirts, a jumper, a coat, and another coat.

                              "'Sa bit chilly" - 3 shirts and a jumper.

                              "Bit of a shit day" - 2 shirts, a jumper, and a hat.

                              "" - Shirt, jumper.

                              "Fuck it's warm." - Shirt, jumper, scowl.

                              "Holy shit I'm fucking dying." - A towel. If that.

                              [–]ZapActions-dower 0 points1 point ago

                              Four shirts? Jesus. In Indiana, if you were more than two shirts and a coat and you aren't spending at least an hour outside, you are a total pussy. If you are, then it is acceptable to also wear a sweatshirt, gloves, and a hat. Scarf if there is high wind or snow blowing.

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                                [–]Battletooth 2 points3 points ago

                                What about -196 F?

                                (Also notice another 7-Eleven directly across the street in the back.)

                                [–]drunk98 0 points1 point ago

                                What about the 7-11?

                                [–]tripstuff 0 points1 point ago

                                This is stupid as fuck. Fahrenheit - Water freezes: 32'. Water boils: 212'. Celsius - Water freezes: 0'. Water boils: 100'. Whoever made this should be shot.

                                [–]xLuMisx 12 points13 points ago

                                Wait. How the hell is 100o C = dead?

                                Edit: Aaanndd now I know why 100o C = dead.

                                Edit 2: And know I also that know that I'm an idiot.

                                [–]NamelessPurity 25 points26 points ago

                                That is 212 degrees Fahrenheit. You would be dead.

                                [–]Tsuroka 27 points28 points ago

                                actually if it's air temperature, you will not die from 100 degrees C (212 F), it is VERY hot, but you wont die (from someone who has been in a sauna over 100C before) You cannot wear any metal, or it will burn you though.

                                [–]I_CATS 3 points4 points ago

                                Nope. As warm-blooded animals we maintain thermal homeostasis, in other words our body has functions to maintain its temperature. You can be in 100C for a long time (up to 30 minutes) before those functions start to fail and eventually you die. Same with 0C, be at that temperature long enough and you will die also.

                                [–]yeropinionman 0 points1 point ago

                                I'll be careful

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                                  [–]Laboii 5 points6 points ago

                                  Because your blood would eventually start boiling, plus I think your lungs would explode (not sure though)? I'm not a doctor, but I know that can't be healthy for your body to exposed to such heat for longer periods. You could probably survive a few minutes but then you're pretty much fucked, but I can't say for certain, the maximum temperature I've endured was about 85o C for about 15 minutes, I felt rather shitty and dehydrated afterwards

                                  [–]trewq321 13 points14 points ago

                                  Explain Finnish Sauna then.

                                  (Though I think it's the moisture...)

                                  [–]StrukkStar 3 points4 points ago

                                  A normal healthy person can endure 100C for more then 30 minutes with feeling absolutely fabulous after.

                                  [–]Jipalio 1 point2 points ago

                                  I endured 84 degrees for about 10 minutes yesterday at a copper tube factory. It was in their melting chamber and I was there to PM all theirs doors, the springs for the overhead doors are high up near the ceiling and before i had even gotten to the top i was sweating my balls off and getting dizzy. It was 24 degrees on the floor.

                                  [–]omegashadow 1 point2 points ago

                                  Blood boiling and lungs exploding DO NOT occur at that temperature (lungs exploding does not really occur at any temperature). Most average human males can spend about 30 minutes at 100 degrees celcius. I have done about 10 but that is anecdotal.

                                  [–]katamba1 3 points4 points ago

                                  212*f = dead

                                  [–]Asdayasman 4 points5 points ago

                                  Alt+0176.

                                  [–]Dustin- 5 points6 points ago

                                  °-°

                                  [–]matt01ss 2 points3 points ago

                                  Alt+168

                                  [–]EmblaZon_Inc 1 point2 points ago

                                  Celcius is based on 0deg. being the freezing point of water and 100deg. being the boiling point.

                                  [–]flyingturdmonster 1 point2 points ago

                                  I would have downvoted the question, but I had to upvote the edit.

                                  [–]florinandrei 0 points1 point ago

                                  100o C is very hot, but not instantly lethal. It's sauna temperature. You could stay there 30 minutes easily, perhaps up to 1 hour. Just don't move a lot and make sure you're hydrated.

                                  [–]HornyYogaMaster 4 points5 points ago

                                  Yay, this shit again.

                                  [–][deleted] ago

                                  [deleted]

                                  [–]majicebe 1 point2 points ago

                                  Yeah, that Kelvin guy doesn't mess around.

                                  [–]ericf150 0 points1 point ago

                                  Scroll to the 2010 incident for confirmation.

                                  [–]gmonkey129 1 point2 points ago

                                  Bitch please... Rankine

                                  [–]ListenTheAtmosphere 0 points1 point ago

                                  my astronomy professor gave us this exact example 2 days ago. Hah!

                                  [–]GregorJLS -1 points0 points ago

                                  100 kalvin is more then a hundred degrees below zero.

                                  [–]SKersh81 0 points1 point ago

                                  Science jokes always make me laugh.

                                  [–]AsColdAsZeroKelvin 0 points1 point ago

                                  I can confirm this.

                                  [–]gonesnake 1 point2 points ago

                                  We need to talk about Kelvin

                                  [–]Oxyuscan 1 point2 points ago

                                  297 degrees kelvin = nice day for a bike ride

                                  [–]baba_is_awesome -1 points0 points ago

                                  Wouldn't it be better 0K Dead 100k stilldead. I mean it's still far below 0° C.

                                  [–]davep85 -1 points0 points ago

                                  I thought I saw this yesterday under a different name... reposts are getting really bad.

                                  [–]VicYesterday 1 point2 points ago

                                  "Hardcore Kelvins" would be a great band name.

                                  [–]freddytheteddy22 -1 points0 points ago

                                  I saw this a month ago.

                                  [–]zaviex -1 points0 points ago

                                  shameless repost

                                  [–]shinobi8 0 points1 point ago

                                  Love this...eventhough it's a repost

                                  [–]MondoStud -1 points0 points ago

                                  Fahrenheit is effective when the only thing you care about is how hot it is outside and quite frankly, who needs a scale for that? You might as well just say 'really hot' or 'really cold'. Celsius and Kelvin become useful when you start to care about science.

                                  [–]WGAF_About_Karma 1 point2 points ago

                                  Unfair! You used an absolute scale against two relative scales.

                                  Mr. Rankine would like to have a word with you.

                                  [–]Hippokrates 0 points1 point ago

                                  Someone quick, do a FIXED version with Degree Rankine

                                  [–]Chezzabe 0 points1 point ago

                                  Can we do a standard of Fahrenheit please? American promises to switch to metric if you do!

                                  [–]Huglifehero 1 point2 points ago

                                  This is quite the repost. I do not agree with your posting.

                                  [–]Barundar 0 points1 point ago

                                  TIL

                                  [–]herboholic 0 points1 point ago

                                  0c isn't fairly cold... it's fucking freezing!

                                  [–]lriley777 1 point2 points ago

                                  100 k = -137 c•. 373k= dead

                                  [–]iluvdonuts 0 points1 point ago

                                  Well that escalated quickly.

                                  [–]jamesmarden 0 points1 point ago

                                  Just saying, this is a re-post.

                                  [–]Metalasanartform 0 points1 point ago

                                  Seriously, OP? I've seen this like 4 times lately. Lurk more.

                                  [–]kylewilky 0 points1 point ago

                                  0 celcius is so warm.

                                  [–]mackintosh18 0 points1 point ago

                                  RererererereereeeeePOSST!

                                  [–]tritonice 0 points1 point ago

                                  No love for Rankine around here today. :(

                                  [–]PaultehMaster 0 points1 point ago

                                  Man, your sooooooo dumb! Kelvin is colder, not hotter.

                                  [–]somethingeasier 0 points1 point ago

                                  Freezing isn't cold enough for you. What's a matter you.

                                  [–]unstealthy_ninja 0 points1 point ago

                                  Fucking Kelvins

                                  [–]Vacster 0 points1 point ago

                                  How come water's freezing point is "fairly cold outside" ? Are you Canadian or something?

                                  [–]ReAvenged 0 points1 point ago

                                  That's Lord Kelvin to you!

                                  [–]FoForum 0 points1 point ago

                                  Note that 100 Kelvin is still about -273°C or something around that.

                                  [–]imakhink 0 points1 point ago

                                  As a Kelvin, I am proud.

                                  [–]EPICMON 0 points1 point ago

                                  reeeeeepost

                                  [–]Knee-poo 0 points1 point ago

                                  Have you been to Missouri?

                                  [–]klassobanieras 0 points1 point ago

                                  Meters are totally worthless too. Proof:

                                  0m tall person = non-existent

                                  100m tall person = nightmarishly huge giant

                                  Useless!

                                  [–]nuke583 0 points1 point ago

                                  Gavin Free

                                  [–]ppsnake 0 points1 point ago

                                  Not this shit again.

                                  [–]Sprocketlord 0 points1 point ago

                                  At 0 Degrees Kelvin, the fabrics of time and space rip apart and the tapestry of good and evil becomes split in half and the dog of society soils the rug of human dignity.

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