this post was submitted on 12 Mar 2024
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Science Memes

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temperature (mander.xyz)
submitted 10 months ago by [email protected] to c/[email protected]
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[–] [email protected] 1 points 10 months ago* (last edited 10 months ago) (1 children)

No it doesn't, unfortunately.

What makes 0F (-18C) special? How do you estimate survivability at such temperature? If I'd be out on the street naked, I would die there in a matter of minutes. At the same time, there is plenty of places where winter temperatures go -40F (-40C) and even below, yet people very much survive and live there.

Similar with 100F (38C). There are places with higher temps in the summer, up to 120F (49C) in some places, yet people survive. Still, if you're not equipped with anything, 100F (38C) will burn you alive.

All that not to mention that 50F (10C) is actually cold, not comfortable.

Fahrenheit is only intuitive and "feeling-descriptive" because you're used to it. From a person born in Celsius country, it's really not less intuitive. I know I can be comfortable in my birthday suit at around 25C. Less than 20 is chilly, less than 10 - cold, less than 0 - freezing. More than 30 is hot, more than 40 is deadly.

[–] [email protected] -1 points 10 months ago (1 children)

0F is the temperature a freezer needs to be to keep food fresh.

50F is the point that you can't survive without clothes, your body will not generate enough heat.

100F (38C) will not burn you alive. You can survive for a long time in a sauna at 200F.

100F is perfect hot tub temperature

[–] [email protected] 0 points 10 months ago (1 children)

Freezer normally operates at -4F

You can't survive without clothes at 55-60F, either.

100F will not burn you in an instant, but the comment went into long-term survival, and good luck surviving at that.

[–] [email protected] 1 points 10 months ago (1 children)

Not sure where you got -4F from.

USDA, United States Department of Agriculture, recommends 0°F or -17.8°C

100°F in the shade isn't extreme, and you'd be able to survive normally (With more water, everyone can use more water)

100°F is hot tub water

120°F is recommended hot tap water

140°F water will pretty much burn you instantly

[–] [email protected] -1 points 10 months ago (1 children)

Guess what, Canada sets the freezer at -15 Celsius. The USDA just chose 0F because it's good enough and a nice easy to remember number, there is nothing special about it.

Same with all your other numbers, your just using whatever the closest even F value is that's easy to remember there's nothing special about any of them and we have equivalents in Celsius

[–] [email protected] 0 points 10 months ago (1 children)

your freezer at -18 °C (0 °F) or lower. This will keep your food out of the temperature danger zone between 4 °C (40 °F) to 60 °C (140 °F) where bacteria can grow quickly.

According to Canada.ca

Every 2 F is basically 1 C. You have more whole numbers with F.

Like -15°C is 5°F

6°F is -14.4444°C

-14°C is 6.8°F

So 5, 6, and 7°F are about equal to -15, -14.5, and -14°C.

And it's not just a random number. You know how much more energy would be used if everyone kept their freezer just a couple degrees colder? It's the optimum recommended temperature.

[–] [email protected] 1 points 10 months ago* (last edited 10 months ago)

No it's random and arbitrary. Those couple degrees improve shelf life and allow for better extermination of many organisms, and higher temperature gradient allows the water to freeze faster, which is reflected in the quality of the product after thawing as it is less affected by wrongly formed and expanded ice. There is no "golden temperature", and so everyone flips it how they like it, and instead of what's actually right this is often dictated by convenience.

There are strong benefits to keeping your freezer at -80°C (-112°F), even, but at this point it crosses the line of practicality by both freezer cost and electricity consumption.

Also, the whole numbers argument is extemely weird. Like, do you know the difference between 71 and 72°F? Is it pronounced in any way? I can assure you, I cannot tell the difference between 21°C and 22°C. And where it actually matters (precise measurements etc.) you'll need decimals for both (and there's nothing wrong with them!)