top | item 40890728

(no title)

jonathan_landy | 1 year ago

Re temp, I’m glad we use F for daily life in the USA. The most common application I have for temp is to understand the weather and I like the 0-100 range for F as that’s the typical range for weather near me.

For scientific work I obviously prefer kelvin.

Celsius is nearly useless.

discuss

order

SkeuomorphicBee|1 year ago

For me the best feature of Celsius, the one that makes it much better for weather, is the zero on the freezing point of water. Everything changes in life when water start to freeze, roads get slippery, pipes burst, crops die. So it is important that such a crucial threshold is represented numerically in the scale. In other words, going from 5 to -5 in Fahrenheit is just getting 10° colder, nothing special, while going from 2 to -2 in Celsius is a huge change in your daily life.

dtech|1 year ago

95% of the world uses Celcius without problems because they're used to it. You'd either also be fine with it or you belong to a sub-5th percentile which couldn't figure it out, take your pick.

rootusrootus|1 year ago

> sub-5th percentile which couldn't figure it out

Ironic, given that one of the prime arguments in favor of metric is that it is easier.

Why do non-US people even care? And do y'all care that you are wrong? The US has recognized the SI. Citizens continue to use measurements they are comfortable with, and it does not hurt anyone. We are also not the only nation that has adopted SI but not made it mandatory. The UK is an obvious example.

Again, I'm back to 'why does anyone else even give a shit'? Aren't there more interesting things to ponder?

inglor_cz|1 year ago

"Celsius is nearly useless."

http://i.imgur.com/3ZidINK.png?1

For anyone not living in the US or Jamaica or Belize, it is Fahrenheit that is completely useless. Which is something like 7,7 billion people.

0 = water freezing temp is hugely useful heuristics for anyone living in moderate climate.

rootusrootus|1 year ago

> For anyone not living in the US

So what I am hearing is that sure, it makes perfect sense for US citizens to continue using Fahrenheit.

fennecbutt|1 year ago

Perhaps it's just because you're not used to it. 17-18c is perfect, 25 is a mild summer day. 30-35 full swing summer and 40 and up is oh no global warming. 5-7 is chilly, 0 is cold, -single digit is damn it's a cold winter and -double digits is when tf did I move to Canada.

creeble|1 year ago

I agree. For ambient temp, F is twice as accurate in the same number of digits. It also reflects human experience better; 100F is damn hot, and 0F is damn cold.

Celsius is for chemists.

lye|1 year ago

There's very little difference between e.g. +25°C and +26°C, not sure why you would need event more accuracy in day to day life. There are decimals if you require that for some reason.

Celsius works significantly better in cold climates for reasons mentioned in another comment.

nephanth|1 year ago

> Celsius is for chemists

Or cooks. Or anyone who cooks, which is most people

ajuc|1 year ago

The difference between -1 C and +1 C is VASTLY more important in daily life than the difference between 26.5 and 27 C.

Farmers, drivers, people with gardens need to know if it will get subzero at night.

Nobody cares if it's 26.5 C or 26 C.

beachy|1 year ago

> Celsius is nearly useless.

That's like ... your opinion man.

Personally I like knowing that water boils at exactly 100 degrees.

prerok|1 year ago

At sea level, yes :)

I do agree, though I live in Europe and C is the norm. I could never wrap my head around F.

That said, I think 0 is more important in daily life, below or above freezing. How much is that in F again?

runarberg|1 year ago

You just use one thing and you’ll learn it. When I was a kid my country changed from archaic 12 point “wind levels” to m/s. It took everybody a few weeks to adjust but it wasn’t hard. It was a bit harder for me after moving to America to adjust to Fahrenheit, but as you experience a temperature, and are told it is so many Fahrenheit, you’ll just learn it. I have no idea at what temperature water boils in F simply because I never experience that temperature (and my kettle doesn’t have a thermometer).

That said I wished USA would move over to the unit everyone else is using, but only for the reason that everyone else is using it, that is the only thing that makes it superior, and it would take Americans at worst a couple of months to adjust.

MostlyStable|1 year ago

I agree that for weather F is better, but I don't think it's so much better as to be worth having two different temp scales, and unlike K, C is at least reasonable for weather, and it works fine for most scientific disciplines.

ryukoposting|1 year ago

I don't see enough love for feet and inches.

A foot can be divided cleanly into 2, 3, 4, and 6. Ten is a really sucky number to base your lengths on. It only divides nicely into 2 and 5.

runarberg|1 year ago

People normally just use the subunit which doesn’t divide. E.g. height is usually referred to in cm. If accuracy is important they use millimeters. Roadsigns for cars use km but downtown wayfinding signs for pedastrians use meters.

I agree it is really nice to use base-12 until it brakes, but it brakes much worse then metric. If you have to divide into 32nds everything about feet and inches is much worse (in metrics we would just use millimeters). The worst offender are wrenches which don’t order intuitively. In metric, if you 13 mm wrench is too big, you just grab an 11 mm wrench. In inches if your 13/16th inch wrench is too big, do you grab the 5/8th? or three-quarters next?

LocalH|1 year ago

At least conversion between Celsius degrees and Kelvin is easy and lossless

nephanth|1 year ago

I find it quite strange that Fahrenheit stuck in the USA with its wide range of climates of all places.

I mean, that "0F to 100F is weather temperature range" completely falls apart unless you live in a very cold climate.

ryukoposting|1 year ago

Sure, temperatures go outside those bounds, but only in the most extreme of weather conditions. Below zero? Above 100? You should probably stay inside today.

lye|1 year ago

What the hell are you talking about. If it's 0°C outside (or below that), I know that it's high time to put winter tires on because the water in the puddles will freeze and driving on summer tires becomes risky. I had to look it up, but apparently that's +32 °F. Good luck remembering that.

+10°C is "it's somewhat cold, put a jacket on". +20°C is comfortable in light clothing. +30°C is pretty hot. +40°C is really hot, put as little clothing as society permits and stay out of direct sun.

Same with negatives, but in reverse.

Boiling water is +100°C, melting ice is very close to 0°C. I used that multiple times to adjust digital thermometers without having to look up anything.

It's the most comfortable system I can imagine. I tried living with Fahrenheit for a month just for fun, and it was absolutely not intuitive.

zdragnar|1 year ago

You'll want winter tires on well before the air temperature hits freezing for water. Forecasts aren't that predictable, and bridges (no earth heat sink underneath) will ice over before roads do.

40 F is a good time for getting winter tires on.

As someone who lives in a humid, wet area that goes from -40 at night in winter to 100+ F in summer, I also vastly prefer Fahrenheit.

The difference between 60, 70, 80 and 90 is pretty profound with humidity, and the same is true in winter. I don't think I've ever set a thermometer to freezing or boiling, ever. All of my kitchen appliances have numbers representing their power draw.

ryukoposting|1 year ago

If you had to "look it up" to remember that 32°F is freezing (or that 212°F is boiling), then you clearly didn't "live with Fahrenheit" long enough to have developed even the most basic intuitions for it. That's first-grade stuff.