yetAnotherUser
@yetAnotherUser@discuss.tchncs.de
Hi!
My previous/alt account is yetAnotherUser@feddit.de which will be abandoned soon.
- Comment on What is negative voltage? 1 week ago:
If you (or anyone else) wants to check their understanding of voltage as the difference between two electric potentials, here’s a couple exercises I stole from a text book:
(Note: Electric potential is also measured in Volt.)
A battery has a constant voltage of 1.5V between its plus and its minus pole. What is the electric potential of the minus pole compared to ground potential when:
- The battery is on an electrically isolating mat?
Solution
The battery is not connected to ground. Therefore, no statements about the electric potential of either pole can be made.
- The minus pole is connected to ground?
Solution
Because of the connection, the electric potential of the minus pole equals that of the ground, which is by definition 0V.
- The plus pole is connected to ground?
Solution
Now the potential of the plus pole equals that of the ground. We know that the voltage difference between the plus and minus pole is 1.5V. Since this difference is measured by subtracting the potential of the minus pole from the potential of the plus pole the equation: 1.5V = p_plus - p_minus = 0V - p_minus => p_minus = -1.5V. Therefore the potential of the minus pole is -1.5V.
- The plus pole is connected to a generator producing an electric potential of 10,000V compared to ground?
Solution
Now the electric potential of the plus pole is also 10,000V. The potential of the minus pole must be 1.5V lower, so it must equal 9998.5V.
- Comment on Is it reasonable to tell a person you once loved about the fact years later? 1 week ago:
Genuinely think you’re arguing about semantics with the love/attraction thing. Like, you can profess your love to someone despite no romantic relationship existing yet.
It’s honestly irrelevant what term OP uses to describe their feelings.
Though I do agree with the 2nd paragraph.
- Comment on Sick as hell 2 weeks ago:
This has that weird AI thumbnail vibe I’m recently seeing everywhere.
- Comment on Flirtation 2 weeks ago:
Vinegar?
Proper pipe cleaning is done using a sodium hydroxide solution. Plus, it causes permanent blindness if it comes in contact with eyes:
Other common uses of sodium hydroxide include: […]
- as drain cleaners that convert pipe-clogging fats and grease into soap, which dissolves in water
Like other corrosive acids and alkalis, a few drops of sodium hydroxide solutions can readily decompose proteins and lipids in living tissues via amide hydrolysis and ester hydrolysis, which consequently cause chemical burns and may induce permanent blindness upon contact with eyes.
en.wikipedia.org/wiki/Sodium_hydroxide
It’s genuinely dangerous, don’t handle this stuff if you don’t wear proper eye and skin protection.
- Comment on Let it sink in. 2 weeks ago:
Use decimal but with 10 different bend angles per finger.
- Comment on brains on autopilot 3 weeks ago:
Surely that isn’t anatomically accurate, is it?
Also, do ducks even have balls?
- Comment on It's not just a comic, it's a meme 3 weeks ago:
It’s an emmm dash.
- Comment on Library Apps are GOATed 3 weeks ago:
Eh, voting is free, library cards are not (over here).
- Comment on freedom after speech 4 weeks ago:
The police don’t hunt you down unless the victim filed a criminal complaint with them first. See: en.wikipedia.org/wiki/Antragsdelikt
Except for politicians, for some reason they’re exempt though there seem to be plans to change this because it’s incredibly unpopular.
- Comment on freedom after speech 4 weeks ago:
it’s a civil violation
Over here it’s very much a criminal offense, so this only applies to some countries.
- Comment on 1 month ago:
Look at the size of that needle and you’ll understand.
- Comment on I also have one 1 month ago:
Nope. Assume the chair fits at most C clothes, with C being a constant.
The efficiency is at worst O© = O(C * 1) = C * O(1) = O(1).
Sure, the more clothes are on top, the longer it takes. But Big O notation is only useful if the N gets very big. And considering that the naximum amount of clothes is likely very small, it can be treated as O(1).
- Comment on please bro just one more try bro 2 months ago:
Thank god the East Germans did not have systemic sexual abuse of children. Phew.
- Comment on Theories on Theories 2 months ago:
Worse: If the chosen axioms are contradictory, then the theorem is effectively worthless.
And it is impossible to know whether axioms are consistent. You can only prove that they are not.
- Comment on RAMANUJAN SPECIAL 3 months ago:
Makes sense though.
The complex Riemann-Zeta function (Zeta(x) = sum from 1 to infinity of 1/n^x) only converges for Re(x) > 1, else it is infinite. We can use analytic continuation - which I understand as extending the function such that it remains holomorphic (basically continuous but in the complex numbers and for some reason well-defined) and find the value of Zeta(-1) that way.
The value of Zeta(-1) when viewed this way is -1/12.
It’s not really saying the sum of all natural numbers is equal to -1/12. It’s really just a mathematical trick, just like: lim (x -> 0) x/x = 1 but this doesn’t mean 0/0 = 1.
- Comment on 3 months ago:
I consider Wikipedia more reliable than vast portions of primary sources. I have seen the awful quality of many papers - “publish or perish” is a thing in science.
And yes, obviously the label “narcissist” is an insult. Just like calling someone “stupid”. When using it as an insult however, it is clearly meant to say this person displays high amounts of narcissism and behaves like a self-centered asshole.
This is different to insults such as “autistic” because that is not a personality style but rather a clinical diagnosis. It would be akin to using the term “disabled” as an insult.
Narcissism is a negative trait if you have too much. That is why it’s an insult. If I say someone is “smelly” I am also insulting their body odor. Doesn’t mean people who struggle with body hygiene for whatever reason should also feel insulted by that.
- Comment on 3 months ago:
The term narcissist doesn’t just refer to someone with that personality disorder.
If you are a self-centered asshole, you are a narcissist regardless of an NPD diagnosis.
See: en.wikipedia.org/wiki/Narcissism
Narcissism is a self-centered personality style
Same with calling someone stupid. It doesn’t mean they have a learning disability.
- Comment on Linux kernel maintainers are following through on removing Intel 486 support 3 months ago:
Is it?
Just use Linux 6.12 with LTS until 2029 and Super LTS until 2036.
- Comment on Crying is a free action 3 months ago:
That’s not a fair example, I know what linear algebra is but can’t tell what’s going on.
Change of basis would be my guess, but that’s pretty basic.
You could’ve provided something far worse, like a manual construction of the Jordan normal form of a large matrix.
- Comment on 3 months ago:
So does every number:
6.000000…
- Comment on Ficken Zodiacs 3 months ago:
Ah yes, Bundesdepublik Reutschland
- Comment on Spicy spicy 4 months ago:
Right?? I genuinely don’t understand this meme, I have never wanted to stack my coins and hold them. Do these people not have wallets?
- Comment on If you're going to accept art this horny please pay someone 4 months ago:
If by “treating you right” you mean imprisoning you for speaking out against the referendum that only further strengthens the “President’s” power (like unilaterally dissolving the parliament and then being allowed to create laws at will, only being allowed to be replaced when sentenced of treason [but the President assigns the president of the constitutional court lol] and so on), then yes.
- Comment on Video game PEGI age-ratings are changing in Europe from June. Four new categories added to tackle elements of addictive design, unmonitored online communication and loot boxes 4 months ago:
The rating system isn’t meant to be taken literally though. It’s expected that parents make an informed choice based on the maturity of their child. The ratings are recommendations and as far as I know only actually enforced by stores/sellers and cinemas.
- Comment on PB&J 5 months ago:
Please provide an example that fits in the Red/Blue overlap.
- Comment on When you're smarter than the teacher that wrote the test 5 months ago:
You didn’t specify the unit.
What if the unit was points^-200 ?
- Comment on Every day, boss makes a dollar, I make a dime... 5 months ago:
What a nice company, providing its employees with free product samples!
- Comment on What's it like living in 2? 5 months ago:
To elaborate, it’s really easy to forge “regular” coins and really attractive to forge high value coins.
For example, the 1 British Pound coin was, before the redesign, widely forged:
As of March 2014 there were an estimated 1,553 million of the original nickel-brass coins in circulation,[6] of which the Royal Mint estimated in 2014 that just over 3% were counterfeit.
(Note for any languages that use the comma as a decimal separator: 1,553 million is referring to 1.5 billion)
- Comment on Sad Ganymede noises 6 months ago:
Yes, that is why I mentioned the IAU’s definition was more specific.
Very large? Enough mass to have a round shape.
Dwarf everything nearby? Clear out its orbit by colliding with/capturing/ejecting shit.
- Comment on Sad Ganymede noises 6 months ago:
I propose a better definition:
Planets are very large objects orbitting a star that dwarf everything nearby
I’m pretty sure this is the intent of the IAU’s definition. It’s just more specific.