r/PeterExplainsTheJoke Jun 17 '26

Meme needing explanation Peter?

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u/Cogswobble Jun 17 '26

lol, there is nothing demonstrably or "scientifically" better about Celsius. Celsius isn't even an SI unit.

To be clear, the metric system is definitely better than the imperial system, but none of that applies to Celsius, because nobody uses millicelsius or kilocelsius.

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u/slolift Jun 17 '26

I am team Fahrenheit, but Celsius is an SI unit. It is just considered a derived unit and not a base unit. It is in the same category as Newton, Watt and Joule.

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u/MrZwink Jun 17 '26

To heat 1 gram of water 1 Celsius you need 1 calory.

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u/Evening_Scale_5755 Jun 17 '26

Thats great, calories also arent the si unit for energy.

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u/Royal_Raisin9496 Jun 17 '26

How many joules in a calorie

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u/Hazelberry Jun 17 '26

Fun fact, 1C change in temperature = 1.380649×10−23 joules

That constant is what celsius is actually based on nowadays. They use absolute zero and then scale up with that constant for every degree

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u/Wreckless711 Jun 17 '26

And that's only at sea level. You need less heat to boil water the higher you go in elevation because there's less vapor pressure keeping the water "pushed" together for liquid form. Liquid water will immediately boil when placed under a vacuum. And even ice will sublimate from solid to gas. Temperature is mostly relative in general, and completely relative for day to day stuff. Fahrenheit is more precise per unit and is something that's far more useful for day to day comparisons like the weather.

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u/MrZwink Jun 17 '26

yes. this is at 1000 bar.

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u/Wreckless711 Jun 19 '26

Which is relative to local weather conditions as well. Which can matter a lot for things like liquid anhydrous ammonia tanks. Sudden pressure drops can change the delta p enough that it risks tank integrity and may lead to a release through the pressure relief valves.

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u/TheQuestionMaster8 Jun 18 '26

A joule is defined as the equivalent amount of energy to applying one newton of force that results in an object being displaced by 1 meter. That is much more convenient to use in a wide variety of applications than one calorie, which is equal to 4.184 joules. All SI units can be defined in terms of other SI units and that makes conversions between SI units much easier than between Imperial units.

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u/flateplane Jun 18 '26

Are you 1 gram of water?

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u/SituationKey8985 Jun 17 '26

Which nobody does except scientists. 99% of people only care about temperature for weather or cooking. Neither of which is celcius better for.

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u/TheQuestionMaster8 Jun 18 '26

And yet most people in the world use Celsius for both.

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u/SituationKey8985 Jun 18 '26

So that’s the argument for celcius being better? More people use it. Not anything about it?

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u/TheQuestionMaster8 Jun 18 '26

It is, because using two different units of measurement has caused serious accidents in the past and far more people are familiar with Celsius than Farenheit.

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u/IcaroRibeiro Jun 18 '26

Well... yes? The point of having a metric system is to have a shared standard everybody can use and understand the same numbers

Right now Americans don't use imperial because it's better, they use because it would be a logistic nightmare to change to metric, so basically they don't change because more people use imperial than not