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submitted 1 month ago by Champoloo@hexbear.net to c/memes@hexbear.net
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[-] Ram_The_Manparts@hexbear.net 39 points 1 month ago* (last edited 1 month ago)

It's literally the default setting on phones and computers in most of the world, right?

[-] Krem@hexbear.net 27 points 1 month ago

yeah but I think americans pronounce it differently for some reason

instead of just saying 16, they say 16 hundred hours. this is despite the fact that very few days are even 25 hours long, most days averaging around 24 or so. the american people are not intellectual, to put it mildly

[-] bunnossin@hexbear.net 21 points 1 month ago

16:00 = 16 hundred because the us military are all crayon eaters

[-] chgxvjh@hexbear.net 6 points 1 month ago

It's 60s not 100s ffs

[-] Enjoyer_of_Games@hexbear.net 4 points 1 month ago

you hear "16 " on a radio was it 16:00 or 16:30 but the signal got cut?

[-] quarrk@hexbear.net 2 points 1 month ago

It’s culture-dependent and set when you specify English (US) on the first boot.

[-] huf@hexbear.net 29 points 1 month ago

our ultra-militarized societies push everyone through intensive mandatory training in 24h clocks by virtue of presenting the tv programme in 24h format.

[-] chgxvjh@hexbear.net 28 points 1 month ago
[-] TrustedFeline@hexbear.net 21 points 1 month ago* (last edited 1 month ago)

I want a watch face that still only has 12 hours, but it goes: 24,13,14,15...,22,23. Then I could be like, I gotta get up early. I work at 19AM tomorrow morning. a 9-5 job would start at 21AM and end at 17PM

[-] miz@hexbear.net 16 points 1 month ago

my head is spinning

[-] ChaosMaterialist@hexbear.net 13 points 1 month ago

you are a sticker and hole punch away from making your dreams come true...

[-] chgxvjh@hexbear.net 12 points 1 month ago

Should just pause for 12 hours

[-] Kopfrkingl@hexbear.net 27 points 1 month ago

24 hr vs 12 hr format is the most pointless debate of all time

[-] chgxvjh@hexbear.net 18 points 1 month ago

π vs τ

(π is correct btw)

[-] mathemachristian@hexbear.net 30 points 1 month ago* (last edited 1 month ago)

border-arc-quad-2border-arc-quad-1        border-diagonal-tl-br         border-arc-quad-2
border-arc-quad-3border-arc-quad-4        border-diagonal-tr-bl         border-arc-quad-3

peppino-square-up

[-] chgxvjh@hexbear.net 10 points 1 month ago

What's the area of a circle?

[-] mathemachristian@hexbear.net 27 points 1 month ago* (last edited 1 month ago)

phoenix-sweat It is πr^2^ or, equivalently, 1/2 τr^2^

phoenix-think But wait since π is defined in terms of the diameter it should be 1/4 πD^2^ .

phoenix-evidence In fact look at all these quadratic forms

  • distance fallen in a gravitational field: 1/2 gt^2^
  • energy of motion: 1/2 mv^2^
  • speed 1/2 at^2^
  • area of a circle 1/2 τr^2^

phoenix-objection-1phoenix-objection-2 Because when you step up from the linear, one dimensional circumference, and integrate, then the antiderivative should have a 1/2 factor to account for the square when differentiating back. The fact that π cancels this factor, and hides it is to its detriment!

phoenix-smug Read https://www.tauday.com/tau-manifesto again, specifically section 3. τ is how the circumference of a unit circle should be defined since we use the radius and never the diameter. Anything else is revisionism comrade, do better.

[-] Muinteoir_Saoirse@hexbear.net 14 points 1 month ago

I have never seen this before, but one of the courses I have to develop curriculum for includes high school level trigonometry, and I am pretty fucking convinced that for learners (especially with LDs in math), the τ circle constant is conceptually easier to understand. The page is absolutely correct that showing a new learner the special angles with τ is a much simpler point of entry than the special angles relative to π (Figures 8 and 10).

Thanks for sharing!

[-] mathemachristian@hexbear.net 8 points 1 month ago

A class full of young tauists sounds sick and I fully agree that it's conceptually much easier (simply by virtue of being the trivial definition). In application however pi still reigns supreme, so if they use calculators for instance there will be a constant translation effort (remember to multiply with 2, or was it halve it??) that could be frustrating.

You have the coolest job ever though much props rat-salute

[-] chgxvjh@hexbear.net 11 points 1 month ago
[-] mathemachristian@hexbear.net 10 points 1 month ago

wholesome A new disciple is born

[-] chgxvjh@hexbear.net 8 points 1 month ago

since π is defined in terms of the diameter it should be 1/4 πD2 .

That's just Tau propaganda

[-] Blakey@hexbear.net 5 points 1 month ago* (last edited 1 month ago)

Um, uh. WH40k!

[-] codexarcanum@lemmy.dbzer0.com 8 points 1 month ago

I bow in honor to your arguments and flawless custom emoji usage. I'm a tauist, but you are a true sage of the Way!

[-] ChaosMaterialist@hexbear.net 7 points 1 month ago

a-little-trolling :beanis: Folks, we have the best ~~posters~~ :deep-nesting: Everybody in the :fedposting:iverse is saying it! :freedom-and-democracy: sicko-hexbear-woke

[-] pierre_delecto@lemmygrad.ml 2 points 1 month ago

thanks for sharing, I've never heard of this before but it does seem easier to understand intuitively.

[-] FALGSConaut@hexbear.net 13 points 1 month ago

24 hr is better but I'm forced to use 12 hr because everyone around me doesn't know 24 hr and the only people who do are military chuds.

Similar reason why I use mm/dd/yy for dates even though dd/mm/yy makes way more sense to me

[-] SkingradGuard@hexbear.net 8 points 1 month ago

I'm sorry but how do people not know? You just add numbers from 12. It's not that hard for most people, surely?

[-] FALGSConaut@hexbear.net 5 points 1 month ago

You would think, but in my experience you try to use 24 hr time and people suddenly can't comprehend numbers larger than 12, and its not worth explaining every time that 17:00 = 5pm. I just do the adjustment myself since 9/10 times they'll ask for clarification anyway

[-] quarrk@hexbear.net 3 points 1 month ago* (last edited 1 month ago)

Mental arithmetic is in fact not universal. People who grew up on 24h time have the benefit of rote memorizing the relationship between 17 and 5 from childhood.

Like, the fact that 9:00 (or 21:00) points leftward / “west” with the hour-hand is something that kids just have to learn and remember. At first it is a lot of mental overhead. But I bet it was immediate for you when you read this, no?

[-] segfault11@hexbear.net 21 points 1 month ago

i use an 8 hour clock because to a grindset sigma like me, a 24 hour "day" is actually three 8 hour days very-smart

[-] came_apart_at_Kmart@hexbear.net 19 points 1 month ago

i count the years in relation to CHRIST.

i count the hours in relation to HIS MERIDIAN.

[-] LaughingLion@hexbear.net 14 points 1 month ago

realtalk

im a burger and i set my phone to celcius like 4 years ago to learn it and itrs taken that long for me to get the hang of it

[-] Enjoyer_of_Games@hexbear.net 6 points 1 month ago

Time to take the next step and set it to kelvin.

[-] LaughingLion@hexbear.net 2 points 1 month ago

who's kelvin?

[-] ikilledtheradiostar@hexbear.net 3 points 1 month ago

as a scientist that uses c, f is superior to what the weather feels like.

[-] Krem@hexbear.net 11 points 1 month ago

no it's not

20°C feels like 20°C. what does 60°F feel like? only americans know. it's "superior" because you're used to it.

[-] ikilledtheradiostar@hexbear.net 2 points 1 month ago

Yeah i guess all temp scales are the same, good point

[-] Kefla@hexbear.net 1 points 1 month ago

Yes

Idk why you thought this was some kind of gotcha, it's just correct. It doesn't matter which one you use.

[-] livestreamedcollapse@lemmy.ml 1 points 1 month ago

As another scientist I do like the granularity of °F over °C for weather, but for anything else C makes more sense. It's almost certainly just having been raised using burger units, but somehow 68°F being pants weather while 72°F is shorts weather makes more sense than interpreting 20°C vs. 22.2°C for the same decision. It's probably cope though.

A very helpful conversion is 10°C = 50°F & every ±5°C from that equals ±9°F.

[-] Krem@hexbear.net 3 points 1 month ago

somehow 68°F being pants weather while 72°F is shorts weather makes more sense than interpreting 20°C vs. 22.2°C for the same decision.

why are you picking 20 vs 22.2 and not 21 vs 23 or 19 vs 22? still completely arbitrary. and shorts weather still depends on sunshine and humidity as much as pure temperature, a cloudy, wet 23 degrees is still cold, but a nice sunny 19 can be fine. i don't think anyone can actually feel the difference between 1°C, much less 1°F

[-] quarrk@hexbear.net 1 points 1 month ago* (last edited 1 month ago)

i don't think anyone can actually feel the difference between 1°C, much less 1°F

On the contrary I think 1C is a perfect temperature increment for meaningful perceived difference. In some applications 0.5C is welcome, but when describing the weather, 22 vs 23 is meaningful.

[-] Bloobish@hexbear.net 4 points 1 month ago

It's standard practice for hospitals and healthcare to document in 24hr timelines, like it's not that hard bro...

[-] livestreamedcollapse@lemmy.ml 2 points 1 month ago

This is me and the NATO phonetic alphabet...

this post was submitted on 13 Apr 2026
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