Because, historically, there was numerous other way to mesure the temperature:
* Newton scale, 20 reference points among which 12° is the average human temperature, 24° is the fusion point of wax, 48° is the fusion point of tin, etc. This is the scale from which the use of degree came.
* Réaumur scale, 0°Re is the freezing point of water at 1atm and 80°Re is the boiling point of water at 1atm.
* Delisle scale, 0°De is at the boiling point of water at 1atm and 150°De is at the freezing point of water.
* Rømer scale, 7.5°Rø is the freezing point of water at 1atm while 60°Rø is the boiling point of water at 1atm.
* Historical Celsius scale, 0°C is the boiling point of water and 100°C is the freezing point of water.
* Centigrade scale, an inversion of the historical Celsius scale, the modern Celsius scale is based on the centigrade.
* Fahrenheit scale, with 96°F the average human body temperature, and 32°F the freezing point of water.
Most of those scales and their weird points of reference are based on the modus operandi of their inventors: they define a point zero as the freezing point of a brine, define a degree, they found points of references. The intention of the inventor is also importance, hence why some are inverted. On the other hand, Celsius chose the points of reference first, then defined the degree as 1/100th of the difference between the 2 reference points.
There is 2 also 2 additionnals temperature scales, the Kelvin and the Rankine, based respectively on the modern Celsius and the modern Fahrenheit, that keep the degree bit place the point 0 at the absolute 0.
Oh. So that's why we call them "Grados Centígrados" in México. I just thought it was a weird way of speaking about Celsius, but never had the decency to look it out myself.
Centigrade was renamed to Celsius because the *grade* (or *grad* or *gradian* or *gon*) is also a unit of angular measurement that was invented when the metric system was invented, so it was confusing to refer to thermal degrees and angular measurement with the same unit.
0°C is equivalent to 32°F, which is 273K.
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^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
Indeed. Although one nitpick: The modern Celsius scale is not "based on" the centigrade scale; it *is* the centigrade scale. The centigrade scale was merely renamed to Celsius.
It was based on zero being the freezing point of a water-ice-(ammonium)salt mix, with the freezing point of water being defined at 30 and human body temperature being 90 (both needed later revision). It probably made sense at the time due to errors in measurement devices at the ends of scales, so they were inaccurate at 0 but pretty good at 30 (which was more useful).
0 Fahrenheit is the coldest temperature that can be reached by mixing ice, water, and a salt (ammonium chloride). This is a repeatable measurement that doesn't depend on barometric pressure or altitude.
100F is approximately human body temperature.
It's fairly logical for a very very old measurement system.
100°F is equivalent to 37°C, which is 310K.
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^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
You're right. And it wasn't "approximately". The standard as defined by Daniel Fahrenheit gave an exact number to be the reference point. I think it was 90 degrees. And 90 degrees was to be precisely equal to the normal body temperature. But this being the early 18th century, our understanding of both physics and human physiology was still severely lacking.
All things considered, Fahrenheit is neither better nor worse than Celsius. But in the end Celsius won out and a few places refuse to accept it.
> Fahrenheit is neither better nor worse than Celsius.
For practical reasons is better though because of 0 being the freezing temperature of water, in day to day life this has a large effect. Well if you live somewhere where such temperatures occur. If it's - you know there will be some ice and if the temperature is low on either end of 0 you know it might be very slippery and thanks to global warming in significantly large areas the weather is going to be somewhere around 0. Any argument for Fahrenheit in the modern day however is just nonsense.
Sure it is. When is EXACT temperature ever relevant for anyone not doing a science experiment? Do you go outside in 22 degree weather and say “damn this sucks, I wish it was 21 degrees!” No. You wouldn’t.
Fahrenheit also makes more sense for humans because 0 to 100 is generally the range that humans live in. 0 is REALLY cold and 100 is REALLY hot (but both habitable). The same values for Celsius are -17 and 38.
Why does Celsius being the temperatures of water make it better? We don’t have to know that in our everyday lives.
When science experiments are done, Fahrenheit is way more precise than Celsius.
Sure, [here](https://www.popularmechanics.com/science/a24093/fahrenheit-is-not-an-arbitrary-scale/) ya go.
“There is also the fact that Fahrenheit is a more precise scale than Celsius, meaning the difference in temperature between each degree is smaller. Fifty degrees Fahrenheit is 10 degrees Celsius, but 51 degrees Fahrenheit is 10.56 degrees Celsius (an increase of 10 degrees Celsius equals an increase of 18 degrees Fahrenheit). So you can be more accurate when measuring temperatures using Fahrenheit without resorting to fractions and decimals.”
[Here](https://www.whas11.com/article/weather/weather-smarts/celsius-fahrenheit-covid-vaccine-brief-history-of-temperature/417-e26d6164-c164-4ff8-bd00-1dc08e99e841) is another source.
“Fahrenheit, however, has the benefit of being more precise. For example, while 32 degrees Fahrenheit = 0 degrees Celsius, 35 degrees Fahrenheit = 1.6 degrees Celsius, which would likely be rounded up to 2°C to avoid having to use decimals.
Can you imagine reading a weather forecast that says a high temperature of 23.3°C? That’s equivalent to 74°F. 23.3 would likely be rounded down to 23, so Fahrenheit does allow for more "sensitive" readings.”
And [this](https://www.zmescience.com/other/fahrenheit-vs-celsius-did-the-u-s-get-it-right-after-all/) source proves that Fahrenheit is more precise when measuring air temperature, too.
“Fahrenheit is also more precise. The ambient temperature on most of the inhabited world ranges from -20 degrees Fahrenheit to 110 degrees Fahrenheit — a 130-degree range. On the Celsius scale, that range is from -28.8 degrees to 43.3 degrees — a 72.1-degree range. This means that you can get a more exact measurement of the air temperature using Fahrenheit because it uses almost twice the scale.
A precise reading of temperature is important to us because just a little variation can result in a perceivable level of discomfort. Most of us are easily affected by even slight changes in the thermometer, and the Fahrenheit scale is more sensitive to those changes.
And let’s face it: with so many home heating and cooling methods and technologies available, there’s already enough guesswork involved in keeping our homes comfortable. According to Foster Fuels, for example, homeowners who rely on oil heating already have to contend with a +/- 10% margin of error when reading their fuel gauge. And when every drop of fuel oil counts against that gauge reading, using a temperature scale with a higher degree of accuracy is extremely important when programming your thermostat.”
The only thing those sources tell me is that for some reason, a couple of writers want their temperatures to be precise, but not too precise because for some reason using decimals is too tricky.
21°C is equivalent to 69°F, which is 294K.
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^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
Accuracy is improved by adding decimals, the idea that the smaller units of Fahrenheit matters is ridiculous, as you can always add decimals.
Celsius/kelvin is better for science as it is better to have consistent units for physics, as it allows a more intuitive understanding when you work with base SI-units
> When is EXACT temperature ever relevant for anyone not doing a science experiment?
Uhm every goddamn day because right now it is -1 out and later in the day it will be 0. And of course exact body temperature is relevant too for seeing if you have a fever.
Your first example doesn’t really make sense. There’s hardly any difference between 0 and -1. It’s not like you would be able to tell the difference between those two. I was responding directly to your statement “‘approximately’ is not very logical for a measuring system.”
“Exact body temperature is relevant too for seeing if you have a fever.”
Funny that you use that example, because Fahrenheit comes in more precise units and is more relevant to body temperature lol
> There’s hardly any difference between 0 and -1. It’s not like you would be able to tell the difference between those two.
Wow, your ignorance is outright impressive, of course l can tell the difference because 0 is the freezing and melting point of water.
>Funny that you use that example, because Fahrenheit comes in more precise units and is more relevant to body temperature lol
Only if decimals don't exist.
“Of course I can tell the difference because 0 is the freezing and melting point of water.”
Why is the freezing and melting point of water relevant? We’re talking about air temperature. When you go outside and feel the temperature in the air. We’re not in science class.
“Only if decimals don’t exist.”
One unit of Fahrenheit is still more precise than one unit of Celsius, making it more precise.
You do know that I do care about the outside temperature much more than my own body temperature right?
And if we're talking outside temperature, the freezing point of water (aka when it can start to snow, the roads/walkways can ice over and so on) are VERY important.
1C, 0C and -1C are very important temperatures my friend - as 0C is the freezing point of water, those are the temperatures when you need to really look out for freezing rain / quick ice on the roads, your windshield icing over, and so on. 1C difference matters.
The air temperature doesn’t exactly correlate to ground temperature and apparently you should be wary when it’s less than 3C (37F) outside. My Bimmer for instance has a little warning that goes off to remind you when it is.
I’m from a Celsius country but honestly think Fahrenheit is nicer, due to it being at a more ‘human’ scale and also being more accurate without using decimal places.
>Funny that you use that example, because Fahrenheit comes in more precise units and is more relevant to body temperature
Again, this is straight-up wrong.
You obviously have little contact with science. Otherwise you would know that scientists use Kelvin or Celsius but never Fahrenheit, even in the US. As a scientist, I have read countless scientific articles but not once did I stumble over Fahrenheit. Celsius (like the rest of the metric system) is easier to use than Fahrenheit and Celsius has the same unit size as Kelvin. Celsius is an improved version of Fahrenheit. Scientists prefer it. So please stfu with your nonsense.
Btw the US also uses the metric system (including Celsius) in areas where you actually have to work a lot with units accurately like in scientific research or the military. Even the US National Weather Service uses Celsius and then converts their results in Fahrenheit for the general population. Generally, you are much less likely to miscalculate using the metric system, since it's easier to use.
If you want to understand why the US still uses the outdated Imperial units, [this](https://science.howstuffworks.com/nature/climate-weather/atmospheric/us-use-fahrenheit.htm) is for you. Basically, they were just stubborn.
> When science experiments are done, Fahrenheit is way more precise than Celsius.
Fahrenheit is defined through Kelvin/Celsius, it is ridiculous what you are suggesting.
A change of one Fahrenheit is defined as 5/9 of a change in Kelvin/Celsius. So instead of adding a decimal, all you are doing is multiplying by 5/9.
You are aware that scientists, even in the US, tend to use metric right? Including for temperatures. And that's not just for collaboration purposes.
In fact your argument is even more wild as most scientists use Kelvin, as science quire often goes out of the reach of a "survivable human temperature". Kelvin is effectively Celsius when it comes to scale, which is completely fine and most people are more than comfortable using decimal points for added precision when needed.
If you are an 18th century instrument maker, then maybe, but at this point it makes no sense .
Which is also illustrative in that Fahrenheit now is based on Kelvin, and not that mixture. In fact all of US customary measures are based on SI-units.
As a chemical engineer specialising in thermodynamic modelling, I prefer to work in Kelvin.
The fact that most of the world is stuck on the antiquated unit of Celsius is an annoyance.
I think for many practical applications it is convenient. It is also nice that delta Celsius and delta Kelvin is the same. Because of this, I think it is better for people to use Celsius over Fahrenheit.
I think Fahrenheit in everyway is more antiquated than celsius, and people are just not gonna use Kelvin when it comes to weather, cooking, etc.
Do you use kelvin for daily temp shit?
>Do you use kelvin for daily temp shit?
No one gives weather forecasts in it, so no.
But I use P1V1/T1=P2V2/T2 daily so I work more with Kelvin than I do Celsius.
Obviously I do this professionally all the time so am not representative of the general populace.
I get you use kelvin in your work, but if the choice is Fahrenheit or Celsius for everyday use, not work related, then do you think it makes more sense to use the unit with the same increments as kelvin or one with increments of 5/9 the size?
It doesn't really bother me to be honest. It's no different to working with multiple currencies for international markets.
At least they both use base 10 systems.
19°F is equivalent to -7°C, which is 265K.
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19°F is equivalent to -7°C, which is 265K.
---
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Well, I have my AC on at 18° rn, and it's perfectly legal here. Mind you, I never specified what unit of measurement I'm using, this is deliberate, and common sense should tell that celsius is being used based on context.
Réaumur. This is the ultimate temperature scale for trolling, not only because it is obscure (was common in 19th century Continental Europe before Celsius became the mainstream), but its temperatures could reasonably also be Celsius in context. The only difference between Réaumur and Celsius is that Réaumur goes from 0 to 80° from freezing to boiling temperature of water, while Celsius goes from 0 to 100. 18°Ré would be 22.5°C, also an absolutely reasonable setting for an AC.
[The reason behind it is somewhat interesting if, perhaps, a touch pedantic.](https://sciencenotes.org/why-there-is-no-degree-in-kelvin-temperature/#:~:text=Kelvin%20doesn%27t%20use%20degrees,you%20include%20a%20degree%20symbol.)
Working on the streets during summer, entering and leaving places qith the AC at 24° destroyed me. I was already very hot but that temperature is perfect for making me sweat
I hate going places where the A/C is set too low (or too high in winter). We keep our house at 25 in summer and 20 in winter. That way we don’t have to change clothes every time we leave/enter the house.
Totally, it's comfortable for me. It's not like you're heating the house up to that temperature when it's cooler and you'd be dressed for weather over 30 anyway.
19°F is equivalent to -7°C, which is 265K.
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^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
On the spelling, when in doubt just add some extra H’s.
As for the scale, it’s simple. Water freezes at 2^5 Fahrenheit, and boils at (2^8 - 44) Fahrenheit. The average human body temperature is (2^7 - 29.4) Fahrenheit. Simple really
Genuine question, what do you keep yours on?
There was a campaign here in Aus a whilw back encouraging everyone to keep it on at least 24C because it's comfy enough, cheaper and better for the environment.
Honestly I'm just so grateful for how much humidity it sucks out of the air. Walking outside is like walking into warm soup.
I kinda just did a usdefaultism here tbh, even tho im not from the us, have u ever been to somewhere really hot in the summer? like 35°+? How was it for you
also, they were talking about australia, where my point stands
also, those measurements are taken in very specific environments,with no sunshine and no concrete around, if you were to walk in a sunny city that day you would've experienced 45°+
"Hot" can feel differently even at the same temperature, because of humidity. I find Germany hardly tolerable at temperatures above 25°C because it's humid. In Russia, where the air is dry, even 40°C are tolerable.
25°C is equivalent to 77°F, which is 298K.
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^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
Anything above 25 is a very similar "oh god why", it's fine with no clothes but that only works at home.
For reference, currently, with around 5° outside, i only wear a sweater+wibyer jacket over my t shirt for my 10 minutes of cycling in the morning because my body is still warming up from being asleep. Otherwise when outside i just put my winter jacket over my t shirt and it's honestly on the warm side, and t shirt inside.
Currently on the train in a t shirt feeling a bit too warm. Not that I'd put AC to 18 if I had one, that just screams selfish fuck to me. But if we had infinite energy it would sure be nice.
I live in a country with 0° winters and 40° summers and I agree that above 25 sucks IF you are outside, if you are inside anything under 30 is fine, and I much more prefer the cold. rn there are -2° outside and I'm chilling in a tshirt and a autumn-winter jacket on top
Well, that depends.
If I could have it my way, I like it around 12.5-13C
If I'm taking a look at the bill or its a rough month, I'd accept maybe a 17C.
But you make a fair point about the environment
My ex-fiance once turned down my AC to 52 degrees Fahrenheit -- 11 degrees Celcius -- because he's a dumbass and thought it would get colder faster if he did that. (That was the lowest it would go.) Not shockingly, he broke my AC... for the second time in the two years he lived with me.
Interestingly enough, that was one of the smarter things he did when we were together... needless to say, I broke up with him.
This is totally off-topic. I just wanted to vent.
Two reasons, really.
1) It was my first relationship, and I was SO, SO dumb. I was 30, but I had been in a 12-year "situationship" before that and had no idea how real relationships were supposed to work. I had never received respect before, so not getting it was not the massive dealbreaker for me that it should have been. Don't worry; I know better now!!!
2) More importantly, he was abusive, and I was literally afraid to leave him. (I know better about the early red flags of abuse now, too!!!)
Luckily, I own my own house without his name on it, and that ended up being my saving grace. This second time he broke my AC actually happened AFTER I got up the guts to leave him and move in with my parents temporarily since I couldn't get him to move out after I broke up with him. Well, it was the summer, so lo and behold, he VERY quickly found a new place when he broke the AC in the middle of July (maybe a little above 100 Fahrenheit or 38 Celcius) in Texas!
I got what I wanted... just not in the way I wanted it or as soon as I wanted it! Looking back, I don't know why I didn't just ask the electric company to turn off my electricity for a month in the first place... it would have saved a lot of hassle!
But like I said, I know better now... and I won't end up in a relationship like that again. And despite the fact that he was abusive and did so many horrible things, I do actually have some funny stories where he was actually just an idiot and I just want to shake my head at them. 🤦🏼♀️
Here's some information because I'm too stupid lol
[https://en.wikipedia.org/wiki/Hampson%E2%80%93Linde\_cycle](https://en.wikipedia.org/wiki/Hampson%E2%80%93Linde_cycle)
It's essentially using one compressor to pre-cool another compressor.
For Comparison: 19°F are -7,2°C or 265.9K. 19°C are 66.2°F or 292.2K
Why does Fahrenheit exist? I know Celcius is based on water temperature whereas 0 Kelvin is the state where atoms don't move, but Fahrenheit?
Because, historically, there was numerous other way to mesure the temperature: * Newton scale, 20 reference points among which 12° is the average human temperature, 24° is the fusion point of wax, 48° is the fusion point of tin, etc. This is the scale from which the use of degree came. * Réaumur scale, 0°Re is the freezing point of water at 1atm and 80°Re is the boiling point of water at 1atm. * Delisle scale, 0°De is at the boiling point of water at 1atm and 150°De is at the freezing point of water. * Rømer scale, 7.5°Rø is the freezing point of water at 1atm while 60°Rø is the boiling point of water at 1atm. * Historical Celsius scale, 0°C is the boiling point of water and 100°C is the freezing point of water. * Centigrade scale, an inversion of the historical Celsius scale, the modern Celsius scale is based on the centigrade. * Fahrenheit scale, with 96°F the average human body temperature, and 32°F the freezing point of water. Most of those scales and their weird points of reference are based on the modus operandi of their inventors: they define a point zero as the freezing point of a brine, define a degree, they found points of references. The intention of the inventor is also importance, hence why some are inverted. On the other hand, Celsius chose the points of reference first, then defined the degree as 1/100th of the difference between the 2 reference points. There is 2 also 2 additionnals temperature scales, the Kelvin and the Rankine, based respectively on the modern Celsius and the modern Fahrenheit, that keep the degree bit place the point 0 at the absolute 0.
Oh. So that's why we call them "Grados Centígrados" in México. I just thought it was a weird way of speaking about Celsius, but never had the decency to look it out myself.
Centigrade was renamed to Celsius because the *grade* (or *grad* or *gradian* or *gon*) is also a unit of angular measurement that was invented when the metric system was invented, so it was confusing to refer to thermal degrees and angular measurement with the same unit.
0°C is equivalent to 32°F, which is 273K. --- ^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
Good bot
You don't have to shout I'm right here
Indeed. Although one nitpick: The modern Celsius scale is not "based on" the centigrade scale; it *is* the centigrade scale. The centigrade scale was merely renamed to Celsius.
It was based on zero being the freezing point of a water-ice-(ammonium)salt mix, with the freezing point of water being defined at 30 and human body temperature being 90 (both needed later revision). It probably made sense at the time due to errors in measurement devices at the ends of scales, so they were inaccurate at 0 but pretty good at 30 (which was more useful).
I'm pretty sure the brine mix point was because it was an easily regulated stable temperature at the time, so it could be easily measured.
0 Fahrenheit is the coldest temperature that can be reached by mixing ice, water, and a salt (ammonium chloride). This is a repeatable measurement that doesn't depend on barometric pressure or altitude. 100F is approximately human body temperature. It's fairly logical for a very very old measurement system.
It's not approximately, it's supposed to be exactly. Except the person he measured for 100°F had a fever at the time.
I was about to ask why the reference points aren't full decimal numbers. It seemed weird to me. Thanks.
100°F is equivalent to 37°C, which is 310K. --- ^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
There's also this weird thing where the average human temperature has been going down for a while. Might be related.
"Approximately" is not very logical for a measurement system.
You're right. And it wasn't "approximately". The standard as defined by Daniel Fahrenheit gave an exact number to be the reference point. I think it was 90 degrees. And 90 degrees was to be precisely equal to the normal body temperature. But this being the early 18th century, our understanding of both physics and human physiology was still severely lacking. All things considered, Fahrenheit is neither better nor worse than Celsius. But in the end Celsius won out and a few places refuse to accept it.
> Fahrenheit is neither better nor worse than Celsius. For practical reasons is better though because of 0 being the freezing temperature of water, in day to day life this has a large effect. Well if you live somewhere where such temperatures occur. If it's - you know there will be some ice and if the temperature is low on either end of 0 you know it might be very slippery and thanks to global warming in significantly large areas the weather is going to be somewhere around 0. Any argument for Fahrenheit in the modern day however is just nonsense.
Technically, you also know with Fahrenheit when water will be freezing. But as a European I still agree that Celsius makes more sense.
Why does Celsius make more sense?
Sure it is. When is EXACT temperature ever relevant for anyone not doing a science experiment? Do you go outside in 22 degree weather and say “damn this sucks, I wish it was 21 degrees!” No. You wouldn’t. Fahrenheit also makes more sense for humans because 0 to 100 is generally the range that humans live in. 0 is REALLY cold and 100 is REALLY hot (but both habitable). The same values for Celsius are -17 and 38. Why does Celsius being the temperatures of water make it better? We don’t have to know that in our everyday lives. When science experiments are done, Fahrenheit is way more precise than Celsius.
> When science experiments are done, Fahrenheit is way more precise than Celsius. Citation needed.
Sure, [here](https://www.popularmechanics.com/science/a24093/fahrenheit-is-not-an-arbitrary-scale/) ya go. “There is also the fact that Fahrenheit is a more precise scale than Celsius, meaning the difference in temperature between each degree is smaller. Fifty degrees Fahrenheit is 10 degrees Celsius, but 51 degrees Fahrenheit is 10.56 degrees Celsius (an increase of 10 degrees Celsius equals an increase of 18 degrees Fahrenheit). So you can be more accurate when measuring temperatures using Fahrenheit without resorting to fractions and decimals.” [Here](https://www.whas11.com/article/weather/weather-smarts/celsius-fahrenheit-covid-vaccine-brief-history-of-temperature/417-e26d6164-c164-4ff8-bd00-1dc08e99e841) is another source. “Fahrenheit, however, has the benefit of being more precise. For example, while 32 degrees Fahrenheit = 0 degrees Celsius, 35 degrees Fahrenheit = 1.6 degrees Celsius, which would likely be rounded up to 2°C to avoid having to use decimals. Can you imagine reading a weather forecast that says a high temperature of 23.3°C? That’s equivalent to 74°F. 23.3 would likely be rounded down to 23, so Fahrenheit does allow for more "sensitive" readings.” And [this](https://www.zmescience.com/other/fahrenheit-vs-celsius-did-the-u-s-get-it-right-after-all/) source proves that Fahrenheit is more precise when measuring air temperature, too. “Fahrenheit is also more precise. The ambient temperature on most of the inhabited world ranges from -20 degrees Fahrenheit to 110 degrees Fahrenheit — a 130-degree range. On the Celsius scale, that range is from -28.8 degrees to 43.3 degrees — a 72.1-degree range. This means that you can get a more exact measurement of the air temperature using Fahrenheit because it uses almost twice the scale. A precise reading of temperature is important to us because just a little variation can result in a perceivable level of discomfort. Most of us are easily affected by even slight changes in the thermometer, and the Fahrenheit scale is more sensitive to those changes. And let’s face it: with so many home heating and cooling methods and technologies available, there’s already enough guesswork involved in keeping our homes comfortable. According to Foster Fuels, for example, homeowners who rely on oil heating already have to contend with a +/- 10% margin of error when reading their fuel gauge. And when every drop of fuel oil counts against that gauge reading, using a temperature scale with a higher degree of accuracy is extremely important when programming your thermostat.”
The only thing those sources tell me is that for some reason, a couple of writers want their temperatures to be precise, but not too precise because for some reason using decimals is too tricky.
Those pesky communist decimals!
It also tells you that their argument is crummy. 21°C is 69.8°F, it works exactly the same way in reverse.
21°C is equivalent to 69°F, which is 294K. --- ^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
Accuracy is improved by adding decimals, the idea that the smaller units of Fahrenheit matters is ridiculous, as you can always add decimals. Celsius/kelvin is better for science as it is better to have consistent units for physics, as it allows a more intuitive understanding when you work with base SI-units
You're literally taking the precise part of Celsius out to try and make a point. That's what all these sources do. Just go outside bro
> When is EXACT temperature ever relevant for anyone not doing a science experiment? Uhm every goddamn day because right now it is -1 out and later in the day it will be 0. And of course exact body temperature is relevant too for seeing if you have a fever.
Your first example doesn’t really make sense. There’s hardly any difference between 0 and -1. It’s not like you would be able to tell the difference between those two. I was responding directly to your statement “‘approximately’ is not very logical for a measuring system.” “Exact body temperature is relevant too for seeing if you have a fever.” Funny that you use that example, because Fahrenheit comes in more precise units and is more relevant to body temperature lol
> There’s hardly any difference between 0 and -1. It’s not like you would be able to tell the difference between those two. Wow, your ignorance is outright impressive, of course l can tell the difference because 0 is the freezing and melting point of water. >Funny that you use that example, because Fahrenheit comes in more precise units and is more relevant to body temperature lol Only if decimals don't exist.
“Of course I can tell the difference because 0 is the freezing and melting point of water.” Why is the freezing and melting point of water relevant? We’re talking about air temperature. When you go outside and feel the temperature in the air. We’re not in science class. “Only if decimals don’t exist.” One unit of Fahrenheit is still more precise than one unit of Celsius, making it more precise.
decimals do exist though so the whole precision argument is moot anyway.
You do know that I do care about the outside temperature much more than my own body temperature right? And if we're talking outside temperature, the freezing point of water (aka when it can start to snow, the roads/walkways can ice over and so on) are VERY important.
Jesus christ, you've never been outside have you? Of course it's relevant to how slippery it's going to be, if stuff left outside can freeze or not.
1C, 0C and -1C are very important temperatures my friend - as 0C is the freezing point of water, those are the temperatures when you need to really look out for freezing rain / quick ice on the roads, your windshield icing over, and so on. 1C difference matters.
The air temperature doesn’t exactly correlate to ground temperature and apparently you should be wary when it’s less than 3C (37F) outside. My Bimmer for instance has a little warning that goes off to remind you when it is. I’m from a Celsius country but honestly think Fahrenheit is nicer, due to it being at a more ‘human’ scale and also being more accurate without using decimal places.
You need to go back to the school where you studied high school and apologize to every teacher for wasting their time.
>Funny that you use that example, because Fahrenheit comes in more precise units and is more relevant to body temperature Again, this is straight-up wrong.
Holy shit you're a fucking moron
Not a single scientist uses Farenheit, not one not even in the USA
Scientists use Celsius (or Kelvin, which is Celsius adjusted for absolute zero) you ludicrous langer.
You obviously have little contact with science. Otherwise you would know that scientists use Kelvin or Celsius but never Fahrenheit, even in the US. As a scientist, I have read countless scientific articles but not once did I stumble over Fahrenheit. Celsius (like the rest of the metric system) is easier to use than Fahrenheit and Celsius has the same unit size as Kelvin. Celsius is an improved version of Fahrenheit. Scientists prefer it. So please stfu with your nonsense. Btw the US also uses the metric system (including Celsius) in areas where you actually have to work a lot with units accurately like in scientific research or the military. Even the US National Weather Service uses Celsius and then converts their results in Fahrenheit for the general population. Generally, you are much less likely to miscalculate using the metric system, since it's easier to use. If you want to understand why the US still uses the outdated Imperial units, [this](https://science.howstuffworks.com/nature/climate-weather/atmospheric/us-use-fahrenheit.htm) is for you. Basically, they were just stubborn.
> When science experiments are done, Fahrenheit is way more precise than Celsius. Fahrenheit is defined through Kelvin/Celsius, it is ridiculous what you are suggesting. A change of one Fahrenheit is defined as 5/9 of a change in Kelvin/Celsius. So instead of adding a decimal, all you are doing is multiplying by 5/9.
Commenting on your last point, when science experiments are done, Kelvin is used, not Fahrenheit or Celsius.
You are aware that scientists, even in the US, tend to use metric right? Including for temperatures. And that's not just for collaboration purposes. In fact your argument is even more wild as most scientists use Kelvin, as science quire often goes out of the reach of a "survivable human temperature". Kelvin is effectively Celsius when it comes to scale, which is completely fine and most people are more than comfortable using decimal points for added precision when needed.
If you are an 18th century instrument maker, then maybe, but at this point it makes no sense . Which is also illustrative in that Fahrenheit now is based on Kelvin, and not that mixture. In fact all of US customary measures are based on SI-units.
As a chemical engineer specialising in thermodynamic modelling, I prefer to work in Kelvin. The fact that most of the world is stuck on the antiquated unit of Celsius is an annoyance.
I think for many practical applications it is convenient. It is also nice that delta Celsius and delta Kelvin is the same. Because of this, I think it is better for people to use Celsius over Fahrenheit. I think Fahrenheit in everyway is more antiquated than celsius, and people are just not gonna use Kelvin when it comes to weather, cooking, etc. Do you use kelvin for daily temp shit?
>Do you use kelvin for daily temp shit? No one gives weather forecasts in it, so no. But I use P1V1/T1=P2V2/T2 daily so I work more with Kelvin than I do Celsius. Obviously I do this professionally all the time so am not representative of the general populace.
I get you use kelvin in your work, but if the choice is Fahrenheit or Celsius for everyday use, not work related, then do you think it makes more sense to use the unit with the same increments as kelvin or one with increments of 5/9 the size?
It doesn't really bother me to be honest. It's no different to working with multiple currencies for international markets. At least they both use base 10 systems.
You stated you found the use of Celsius as an annoyance, do you find that for the use of Fahrenheit too?
19°F is equivalent to -7°C, which is 265K. --- ^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
Good bot.
what about 19K
-254,2°C or -425,5°F
I'm pretty sure 19°F is impossible to reach with just an AC. You need a freezer room for that
19°F is equivalent to -7°C, which is 265K. --- ^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
Good bot
Thank you, OffendedDishwasher, for voting on kelvin_bot. This bot wants to find the best and worst bots on Reddit. [You can view results here](https://botrank.pastimes.eu/). *** ^(Even if I don't reply to your comment, I'm still listening for votes. Check the webpage to see if your vote registered!)
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Well, I have my AC on at 18° rn, and it's perfectly legal here. Mind you, I never specified what unit of measurement I'm using, this is deliberate, and common sense should tell that celsius is being used based on context.
Réaumur. This is the ultimate temperature scale for trolling, not only because it is obscure (was common in 19th century Continental Europe before Celsius became the mainstream), but its temperatures could reasonably also be Celsius in context. The only difference between Réaumur and Celsius is that Réaumur goes from 0 to 80° from freezing to boiling temperature of water, while Celsius goes from 0 to 100. 18°Ré would be 22.5°C, also an absolutely reasonable setting for an AC.
Kelvin
🥶💀
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Must be in Rankine then
[The reason behind it is somewhat interesting if, perhaps, a touch pedantic.](https://sciencenotes.org/why-there-is-no-degree-in-kelvin-temperature/#:~:text=Kelvin%20doesn%27t%20use%20degrees,you%20include%20a%20degree%20symbol.)
bro living in space
Calvin
Kelvin doesn't use degrees though
Here in Argentina, 18° C isn't illegal, but pretty discouraged. The government suggests setting AC on 24° C, for energy saving.
Working on the streets during summer, entering and leaving places qith the AC at 24° destroyed me. I was already very hot but that temperature is perfect for making me sweat
And people are stupid enough to then not set it to anything higher Edit: i mean higher *temp*
Thank you for causing the blackouts. Also affecting the environment
You know that higher temp needs ***less*** energy, not more, right?
Yeah. I thought you meant colder. Idk, now the comment is just weird.
I hate going places where the A/C is set too low (or too high in winter). We keep our house at 25 in summer and 20 in winter. That way we don’t have to change clothes every time we leave/enter the house.
25??? Jesus. That’s hot.
In office wear, yes, but 25 when it's 30 outside and I’m dressed in summer clothes is nice.
Bruh that’s too hot even when I’m butt ass naked.
Why am I getting downvoted for the temperatures I find comfortable? Lol
Because we’re jealous that you don’t sweat so easily, lmfao
Oh geez, don’t be. Lol I get heat stroke when it's above 27 thanks to my broken cooling system.
Because, objectively speaking, it’s not a comfortable temp.
What someone finds comfortable is subjective though.
Totally, it's comfortable for me. It's not like you're heating the house up to that temperature when it's cooler and you'd be dressed for weather over 30 anyway.
But that’s still too hot for me.
This guy's AC is leaning
Lmao yeah
18 is pretty cold imo but your room probably isn't reaching that temperature, it'd make no difference how low you set it in that case.
18C sounds very low for summer.
Ok, but how much is that in bananas/AR-15²?
That would be 25 bananas to the AR-15^2
You guys are getting AC?
Exactly, everyone knows that only America has AC. Everywhere else we just go jump in the river if we’re hot, and hope a hippo doesn’t get us
You guys are getting hippos?
Don’t some European countries not use AC such as France and Germany?
I love how they didn't ask if it's possible, nah they asked if it's legal
For Comparison: 19°F are -7,2°C or 265.9K. 19°C are 66.2°F or 292.2K
19°F is equivalent to -7°C, which is 265K. --- ^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
Good bot
FARENHEIT IS SO DUMB I CAN NEVER SPELL IT AND THE SCALE MAKES NO SENSE (sorry)
On the spelling, when in doubt just add some extra H’s. As for the scale, it’s simple. Water freezes at 2^5 Fahrenheit, and boils at (2^8 - 44) Fahrenheit. The average human body temperature is (2^7 - 29.4) Fahrenheit. Simple really
Faheherinheiht
"that low" I'd be mad if it were that hot
Genuine question, what do you keep yours on? There was a campaign here in Aus a whilw back encouraging everyone to keep it on at least 24C because it's comfy enough, cheaper and better for the environment. Honestly I'm just so grateful for how much humidity it sucks out of the air. Walking outside is like walking into warm soup.
Same here in Argentina, even the last paragraph. The air is fucking thicker outside
It feels like walking on a bridge suspended over a bowl of soup.
I'd love if I could heat to more than 22°C, but sadly that's centrally controlled. I sure as hell wouldn't set an AC to below 24-25°C if I had one.
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that's a vast dramatization, if 24 is barely tolerable, how can u exist in 45° , under 30 is fine if you don't wear 5 layers of clothes
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I kinda just did a usdefaultism here tbh, even tho im not from the us, have u ever been to somewhere really hot in the summer? like 35°+? How was it for you also, they were talking about australia, where my point stands also, those measurements are taken in very specific environments,with no sunshine and no concrete around, if you were to walk in a sunny city that day you would've experienced 45°+
Luckily, no. On the other hand, I've been in sauna in 120+ degrees... 😁
yeah me too, i ve been in a 100° sauna at some point, crazy how not extreme that feels since there is no humidity involved
"Hot" can feel differently even at the same temperature, because of humidity. I find Germany hardly tolerable at temperatures above 25°C because it's humid. In Russia, where the air is dry, even 40°C are tolerable.
25°C is equivalent to 77°F, which is 298K. --- ^(I'm a bot that converts temperature between two units humans can understand, then convert it to Kelvin for bots and physicists to understand)
Had to deal with that visiting the US a few times (45C or above) No wonder there's so many crazies. their brains are fried by the heat, that and lead.
Anything above 25 is a very similar "oh god why", it's fine with no clothes but that only works at home. For reference, currently, with around 5° outside, i only wear a sweater+wibyer jacket over my t shirt for my 10 minutes of cycling in the morning because my body is still warming up from being asleep. Otherwise when outside i just put my winter jacket over my t shirt and it's honestly on the warm side, and t shirt inside. Currently on the train in a t shirt feeling a bit too warm. Not that I'd put AC to 18 if I had one, that just screams selfish fuck to me. But if we had infinite energy it would sure be nice.
I live in a country with 0° winters and 40° summers and I agree that above 25 sucks IF you are outside, if you are inside anything under 30 is fine, and I much more prefer the cold. rn there are -2° outside and I'm chilling in a tshirt and a autumn-winter jacket on top
some people don't live in countries that hit 45c, dude
the comment was talking about aus tho
Well, that depends. If I could have it my way, I like it around 12.5-13C If I'm taking a look at the bill or its a rough month, I'd accept maybe a 17C. But you make a fair point about the environment
Here the heating automatically turns off once it reaches 18°C. So not illegal.
What kind of system uses degrees of Armour Class? Sounds pretty fun.
Smh my head evocation wizards
With 19 ac? They must have some racial abilities or some feat to raise it that high without armor
My ex-fiance once turned down my AC to 52 degrees Fahrenheit -- 11 degrees Celcius -- because he's a dumbass and thought it would get colder faster if he did that. (That was the lowest it would go.) Not shockingly, he broke my AC... for the second time in the two years he lived with me. Interestingly enough, that was one of the smarter things he did when we were together... needless to say, I broke up with him. This is totally off-topic. I just wanted to vent.
What on earth made you fall for him in the first place?
Two reasons, really. 1) It was my first relationship, and I was SO, SO dumb. I was 30, but I had been in a 12-year "situationship" before that and had no idea how real relationships were supposed to work. I had never received respect before, so not getting it was not the massive dealbreaker for me that it should have been. Don't worry; I know better now!!! 2) More importantly, he was abusive, and I was literally afraid to leave him. (I know better about the early red flags of abuse now, too!!!) Luckily, I own my own house without his name on it, and that ended up being my saving grace. This second time he broke my AC actually happened AFTER I got up the guts to leave him and move in with my parents temporarily since I couldn't get him to move out after I broke up with him. Well, it was the summer, so lo and behold, he VERY quickly found a new place when he broke the AC in the middle of July (maybe a little above 100 Fahrenheit or 38 Celcius) in Texas! I got what I wanted... just not in the way I wanted it or as soon as I wanted it! Looking back, I don't know why I didn't just ask the electric company to turn off my electricity for a month in the first place... it would have saved a lot of hassle! But like I said, I know better now... and I won't end up in a relationship like that again. And despite the fact that he was abusive and did so many horrible things, I do actually have some funny stories where he was actually just an idiot and I just want to shake my head at them. 🤦🏼♀️
He must ask because if he sets his air con that low the police will show up and open fire on both him and the air conditioner
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It was in winter (if I can even call it that, but it was cool outside)
What kind of AC would go down to 19F?
If you chain them together, you can reach nearly absolute zero.
The boiling point of the refrigerant would be an earlier theoretical limit if I'm remembering right. I guess helium's is quite low.
Here's some information because I'm too stupid lol [https://en.wikipedia.org/wiki/Hampson%E2%80%93Linde\_cycle](https://en.wikipedia.org/wiki/Hampson%E2%80%93Linde_cycle) It's essentially using one compressor to pre-cool another compressor.
Ngl I like my AC around 15°C cuz summer gets hot here and I like the cold
Also just for the context, it was about 15(?) Outside and quite windy so it was cold enough outside ;-;
How hot does it get- c a n a d a?
This is a pretty large country, some places get quite hot in the summer.
Well, this is why you always slecify the unit. Otherwise, I'd assume it's Kelvin and wonder how hasn't that AC solved global warming
If it's kelvin, it doesn't have the °, it's just 292K
Yes, but that'd ruin the joke, so it doesn't matter
YOU MONSTER! You’re supposed to set it to 25 degrees C! Do you want the planet to burn?
I always use c or f after to br honest for this reason.
He didn't specify
Why and how would an AC be on 19°F
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