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Cake day: May 31st, 2024

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  • where’s this “freezing water” you can stick your thermometer into, that’s reliably == 0 degrees? Ice keeps getting colder, and melted water can be any temperature above 0.

    A substance undergoing phase change will hold its temperature until the change is complete. That means that once water starts freezing, it will be 0°C until it is all ice. Same goes for ice thawing. Yes only pure H2O will freeze at exactly 0°, but unless you deliberately put some shit in it it will be very, very, very close. Boiling is a bit more sensitive, but still a lot less than the natural variance between body temperatures in normal conditions.

    You’re taking the procedure literally, but it was just to get a point across. Also, using the freezing and water boiling points of water was used to define Fahrenheit too for most of the 20th century.




  • No one “forgets” temperatures dude, 17°C might be meaningless to you but to me it’s just shirt and light jacket weather. Nobody forgets what the body temperature in Celsius is. It’s two digits, your brain can do it.

    Fahrenheit simply puts the human at the center where physical phenomena like water freezing and boiling happen at “random” points on its scale, while Celsius takes two simple, constant (as long as you’re not on a mountain), verifiable points based on physics, where the temperature of a human body falls on a “random” place on it.

    The point is very simple: if you have an unlabeled thermometer and need to calibrate it, you stick it in freezing water, mark 0, stick it in boiling water, mark 100, divide into equal segments, and it will be exactly right. If you want to do the same for Fahrenheit, you need another reference thermometer. (Unless you happen to have the same unspecified mixture of water, ice, and ammonium chloride that Fahrenheit supposedly originally used to mark the 0 point)