explain xkcd - User contributions [en]

Talk:730: Circuit Diagram

2025-11-23T03:01:17Z

Bicorn: forgot to sign it

So, is the arena a new kind of comparator or something? '''[[User:Davidy22|Davidy22]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 13:28, 18 February 2013 (UTC)

11:13, 10 April 2013 (UTC)11:13, 10 April 2013 (UTC)[[User:Jh6p|Jh6p]] ([[User talk:Jh6p|talk]])
The 3 liter capacitor could also be a ball approximately 6 inches in diameter if the seams on the ball were similar to the seams on a basketball. Perhaps a volleyball?

: "A squirrel. What it does as a circuit element is unsure."
Perhaps an allusion to a {{w|Squirrel-cage rotor|squirrel cage}}?
[[User:Wwoods|Wwoods]] ([[User talk:Wwoods|talk]]) 18:51, 22 April 2013 (UTC)

: The shape of the squirrel's tail reminds me of a {{w|hysteresis}} curve, although this is admittedly a bit of a stretch. —[[User:Scs|Scs]] ([[User talk:Scs|talk]]) 16:02, 17 November 2013 (UTC)

The 'to scale' motor would be about half a mile wide. Powering the rabbit on Gaia's vibrator (also included)? --[[User:StarChaser Tyger|StarChaser Tyger]] ([[User talk:StarChaser Tyger|talk]]) 08:40, 22 June 2013 (UTC)

I beg to differ on the flux capacitor thing, as cool as it sounds. Since it is right above the I-90 notation, it is more likely a fork in the road (notice the road stripes indicating that you can pass at any point in the fork). [[Special:Contributions/97.87.12.114|97.87.12.114]] 02:15, 24 June 2013 (UTC)
: Oh, I'm pretty sure it's a flux capacitor. Compare some of [http://www.google.com/search?q=flux+capacitor&tbm=isch these images]. Yes, there are several road references in this comic, but an electronic reference (especially to a ''fictional'' electronic component!) makes more sense. Also I've never seen a Y-shaped highway intersection that looked quite like that (and especially not on an interstate). —[[User:Scs|Scs]] ([[User talk:Scs|talk]]) 14:52, 17 November 2013 (UTC)

I have wasted 4 hours on the puzzle, and after wasting 9 pages of A5 paper, the resistance of that terrible resistor mess worked out to be exactly 25265/33783 ohm, or about 0.74786135 ohm. --KopaLeo [[Special:Contributions/199.48.226.89|199.48.226.89]] 15:16, 27 June 2013 (UTC)

I think that the "fishing float" might actually be a picture of an ordinary push switch (similar to foot switches used on standard lamps). [[Special:Contributions/87.194.171.29|87.194.171.29]] 16:12, 10 July 2013 (UTC)

Isn't the "YES" resistor a reference to the anecdote of how John Lennon and Yoko Ono met? That's what I thought when I saw it, but then, I kinda like The Beatles a bit. [[Special:Contributions/200.70.22.74|200.70.22.74]] 12:27, 16 September 2013 (UTC)
Another alternative for the "YES" resistor is a pun: if one was being resistant to an idea you would expect to get "NO' from them. This resistor however says "YES". [[Special:Contributions/172.70.127.53|172.70.127.53]] 07:39, 8 March 2023 (UTC)Verisimilidude

I think the attempt to explain every single piece of the comic is rather silly. The humor largely draws from the absurdity of the diagram, and that can probably be summarized without going into detail about the possible references of each individual component. [[Special:Contributions/199.27.130.180|199.27.130.180]] 03:22, 26 November 2013 (UTC)
: I disagree. The joke works on multiple levels, both the absurdity of the circuit, and the smaller parts of which it is comprised. [[User:Hydroksyde|Hydroksyde]] ([[User talk:Hydroksyde|talk]]) 02:40, 21 April 2014 (UTC)
: The whole point of this website is to explain the jokes behind the comics, so that people who don't get it will be able to get it, or people who don't understand something mentioned in the comic will understand what the thing is. It is very common to go into a lot of detail [[User:Firestar233|guess who]] ([[User talk:Firestar233|if you desire conversing]] | [[Special:Contributions/Firestar233|what i have done]]) 05:19, 16 February 2025 (UTC)

I concur with KopaLeo - I got the same answer for the resistance of the grid of resistors - about 0.748 when rounded. What a problem!
--techdude
[[Special:Contributions/108.162.215.65|108.162.215.65]] 20:45, 1 January 2014 (UTC)

I feel like I should point out that putting a ground connection in holy water probably creates {{w|Holy Ground}} [[Special:Contributions/108.162.212.197|108.162.212.197]] 11:36, 26 March 2014 (UTC)

: Might also be a reference to demineralised (demin - holy) water [[User:Toby1|toby1]] ([[User talk:Toby1|talk]]) 03:10, 12 January 2023 (UTC)

To center of Sun could possibly be another map reference. [[Special:Contributions/108.162.250.202|108.162.250.202]] 01:08, 19 November 2014 (UTC)

The 'moral rectifier' seems like it's built of diodes which prevent current flow to the left, which might mean it's making the current 'more right'? with right being a synonym for moral?
[[Special:Contributions/108.162.212.18|108.162.212.18]] 00:15, 17 December 2014 (UTC)

;3L capacitor

The capacitor reminded me of a time I asked my dad why desktop PCs (the kind we could afford at the time were 200-500 W) couldn't have capacitors to protect them from 1-second or shorter power interruptions without the cost of a UPS. He said such a capacitor would have to be as wide and tall as a 2L pop bottle. (He didn't say how much it would weigh.) [[User:Promethean|Promethean]] ([[User talk:Promethean|talk]]) 04:38, 9 September 2014 (UTC)

Where did the claim that the EKG is atrial fibrillation come from? At best it it hard to tell without a time scale what the ventricular rate is, but there is no evidence of extra P waves between QRS complexes that I see. If the diagnosis is made based on the absence of P & T waves, keep in mind that some recording conditions make those (especially T) hard to see. In an {{w|Einthoven's triangle}} arrangement, they might not show up at all above the noise. If we had a time scale that let us calculate ventricular rate, we might be able to conclude {{w|supraventricular tachycardia}}, but I'm hesitant to make a strong claim that this is abnormal at all given that it's hand drawn and we have no scale.[[User:Djbrasier|Djbrasier]] ([[User talk:Djbrasier|talk]]) 21:07, 22 January 2015 (UTC)

Does this really belong in Category:Charts? I'm moving it to Category:Maps instead. [[User:gijobarts|gijobarts]] ([[User Talk:gijobarts|talk]]) 21:38, 19 February 2015 (UTC)

Are we really explaining "vibrator" as "a motor with an off-center weight attached to it"? [[Special:Contributions/141.101.91.97|141.101.91.97]] 06:51, 13 March 2015 (UTC)

I just spent 3 hours trying to work out the resistor nest. I was unsuccessful. [[User:Mikemk|Mikemk]] ([[User talk:Mikemk|talk]]) 05:32, 19 March 2015 (UTC)

I did an LTSpice simulation or the resistor mess. It looks like the 25265/33783 ohm answer above is correct. It drew 1.3371463 amps from a one volt source. {{unsigned ip|108.162.215.133}}

Based on Randall's promotion of international standards (such as ISO 8601), it seems odd that he's using the US zigzag symbol for a resistor, rather than the IEC rectangular one. [[User:Walale12|Walale12]] ([[User talk:Walale12|talk]]) 21:37, 17 April 2015 (UTC)

Looking at the label "Tear Collector" I think it refers to the heartbeat below it, not the symbol above, suggesting that a heart (or heart break) is a likely source of tears. {{unsigned ip|108.162.216.44}}

I'm not sure why the rat's nest of resistors is considered such a difficult problem. I would like to respectfully point out that by far the easiest way to solve it is by assuming a constant current through the network. You can then assign a name to each of the nodes, set one of the end nodes to 0V, and solve by KCL. Granted, there are 13 unknowns and 14 equations, but it still took less than 30 minutes to complete since they are all 1st order! archerator [[User:Archerator|Archerator]] ([[User talk:Archerator|talk]]) 04:57, 30 August 2015 (UTC)

120×72 @ 537,847: the coil symbol next to "Take off shirt while wiring this part. Ooh, yeah, I like that." is similar in appearance to chest hair in stylized comic strips. [[User:Thaledison|Thaledison]] ([[User talk:Thaledison|talk]]) 17:19, 5 October 2015 (UTC)

144×177 @ 31,753 - Could the rats next of 1 Ohm resister be a reference the the sign that Blackhat holds up in: https://xkcd.com/356/ as you can't show an infinite numbers of 1 ohm resistors in the diagram?{{unsigned ip|141.101.98.108}}

To me, the arena calls to mind the one in the Labyrinth in the Percy Jackson book series. One of the figures resembles a centaur, which was a gladiator that was defeated in said arena in the scene it is introduced. [[Special:Contributions/108.162.245.46|108.162.245.46]] 22:16, 30 October 2016 (UTC)

And here I was thinking that the fishing float was a Pokeball... [[User:Whoop whoop pull up|Whoop whoop pull up]] ([[User talk:Whoop whoop pull up|talk]]) 19:03, 28 April 2017 (UTC)

I think that "take off shirt while wiring this" could be sexual reference- there is "ooh, i like that"

:I always thought that the 555 timer was called so because of the three 5k ohm resistors...apparently it is a myth! Does anybody know the real reason?

Regarding the resistor part - I read http://mathworld.wolfram.com/ResistanceDistance.html and implemented it in Mathematica. <nowiki>g = Graph[{1 <-> 2, 1 <-> 3, 1 <-> 4, 1 <-> 5, 2 <-> 3, 2 <-> 6, 3 <-> 6, 3 <-> 7, 3 <-> 8, 4 <-> 7, 4 <-> 5, 5 <-> 9, 5 <-> 10, 6 <-> 12, 6 <-> 11, 7 <-> 12, 7 <-> 11, 7 <-> 13, 7 <-> 14, 7 <-> 9, 8 <-> 15, 8 <-> 10, 9 <-> 14, 10 <-> 15, 11 <-> 12, 11 <-> 13, 13 <-> 14, 14 <-> 15}]; m = KirchhoffMatrix[g] + 1/15; inverse = Inverse[Table[m[[i, j]], {i, 1, 15}, {j, 1, 15}]]; omega[i_, j_] := inverse[[i, i]] + inverse[[j, j]] - 2*inverse[[i, j]]; omega[1, 13]</nowiki>. The result was 167294/195327 = 0.856482...

I feel that it needs to be electronic eel more than an electric one.

Ok, who the hell did the explanation for Magic Smoke? I even had to make a <nowiki>[</nowiki>[[285|REAL Citation needed]]<nowiki>]</nowiki> sign to indicate that the needed citation wasn't a joke.[[Special:Contributions/108.162.242.21|108.162.242.21]] 15:02, 4 November 2019 (UTC)

Isn't it 616 not 666 citation[https://en.wikipedia.org/wiki/Number_of_the_Beast]--[[User:Galactic ascencion|Galactic ascencion]] ([[User talk:Galactic ascencion|talk]]) 07:32, 17 March 2020 (UTC)
:Well the image clearly shows a 666. Also the wikipedia article you use as a citation here, states also both numbers. The number should be most famous (at least to people who do not follow the bible/quran word by word and to specific translation) due to its use by iron maiden in the song "the number of the beast" which also states it as 666, and other pop culture references. --[[User:Lupo|Lupo]] ([[User talk:Lupo|talk]]) 10:10, 17 March 2020 (UTC)

Could wimp also stands for {{w|weakly interacting massive particles}}, a candidate of {{w|dark matter}}? Then it will reasonably omit the electromagnetic interactions running in this circuit diagram.--[[User:Lamty101|Lamty101]] ([[User talk:Lamty101|talk]]) 14:13, 2 July 2020 (UTC)

; Balloon

The line of the balloon also crosses another circuit, which could be a hazard in itself (flying kites or balloons near high-voltage lines is quite dangerous, and helium-filled balloons are often forbidden in railway stations with overhead catenary). This may also be what the "caution" arrow is indicating. [[Special:Contributions/162.158.159.73|162.158.159.73]] 13:14, 22 January 2022 (UTC)
:By my reading, the ballon is anchored ''at'' the junction between the caution-bend and the vertical one. I think there's danger of the balloon rising to touch the solder-blob, or other bits above it, but I think its already electrically bonded at the non-balloon end (insofar as 'reality' can be interpreted). Yes, there's possible danger (and you IRL point is true) but it's elsewhere, if not almost everywhere else..! [[Special:Contributions/172.70.162.77|172.70.162.77]] 15:34, 22 January 2022 (UTC)

While I won't revert [https://www.explainxkcd.com/wiki/index.php?title=730:_Circuit_Diagram&oldid=225428 this minor 'correction'], I disagree that it was wrong before. "Types of junction" is a plural-phrase already. "One type of junction" vs. "(Two/Many/No) types of junction". (It is the type(s) that is/are singular/plural, what they then are ''of'' is similar to a postpositive adjective, but in propositional form. "Types of junctions" reads clunkily.

Caveat: I am approaching this as British English (I hope!) but I extensively looked to see if this was one of those cases* US English differs and failed to find anything at all about it. * - by complete fluke, I wrote "this was one of those cases", which could have been "'''one''' of those case'''s''' which '''was'''", where the plurality agreement does not not ask for "were". Well, except in a certain dialect ("He were, she were, they were, we were ...") not far from another area that goes the other way ("He was, she was, they was, we was, ..."), but that doesn't help matters. ;) [[Special:Contributions/172.70.86.68|172.70.86.68]] 16:05, 23 January 2022 (UTC)

; Pi resistor

It was conjectured but unconfirmed that the constant "4 times pi" was once called omega. As the pi resistor in the comic was missing the "Ω" symbol, this "pi" may be a pun on "0.25Ω" to the power of [[[285|citation needed]]]. The "e with dieresis" may also be related. --[[User:ColorfulGalaxy|ColorfulGalaxy]] ([[User talk:ColorfulGalaxy|talk]]) 17:04, 12 January 2023 (UTC)

; 3 liters

Might the "3 liters" label on the feedthrough be a joke on how "feedthrough" can be misread as "feed trough"? [[User:Bicorn|Bicorn]] ([[User talk:Bicorn|talk]]) 03:01, 23 November 2025 (UTC)

Talk:730: Circuit Diagram

2025-11-23T03:00:20Z

Bicorn: suggestion on the "3 liters" feedthrough

3120: Geologic Periods

2025-07-26T13:41:55Z

Bicorn: fixed malformed Wikipedia link

{{comic
| number = 3120
| date = July 25, 2025
| title = Geologic Periods
| image = geologic_periods_2x.png
| imagesize = 611x557px
| noexpand = true
| titletext = Geologists claim it's because the earlier Cenozoic used to be called the Tertiary, but that's just a ruse to hide the secret third geologic period, between the Neogene and the Quaternary, that they won't tell us about.
}}

==Explanation==
{{incomplete|This page was created by a Cretaceous raptor. Don't remove this notice too soon.}}

{| class="wikitable"
!Period
!Dates (millions of years ago)
!My Favorite Part
!My Biggest Complaint
!Explanation
|-
|Precambrian
|4500-539
|Life develops
|Snowball Earth episodes
|The {{w|Precambrian}} (italicized in the comic since it's not a {{w|Period (geology)|geologic period}}) is the first 88% of Earth's history, including the time 4.1 to 3.4 billion years ago when life on Earth began. The {{w|Snowball Earth}} hypothesis says that during some time spans in the past, Earth became nearly or entirely frozen, with no liquid water on the surface. It's related to the idea of the {{w|Greenhouse_and_icehouse_Earth#Icehouse_Earth|icehouse Earth}}, times when the planet fluctuates between glacial and interglacial periods (such as now).
|-
|{{w|Cambrian}}
|539-487
|Trilobites!
|Evolution could stand to calm down a little
|The {{w|Cambrian explosion}} was a sudden radiation of complex life forms when nearly all important animal phyla, or precursors to them, appeared.
|-
|{{w|Ordovician}}
|487-443
|Earth might have had rings
|Scary volcanic eruption in North America
|Due to the non-random location of impact of one type of meteorite, {{w|Rings_of_Earth|it is proposed}} that those have formed a planetary ring system around Earth before colliding with it.
|-
|{{w|Silurian}}
|443-420
|First land animals
|Earth's newfound mold problem
|
|-
|{{w|Devonian}}
|420-359
|Big mountains in Boston
|Yeah, sure, what those giant killer fish needed was armor
|
|-
|{{w|Carboniferous}}
|359-299
|Cool forests
|Bugs too big
|The {{w|Carboniferous#Terrestrial_invertebrates|'bugs' in this period}} included the largest-ever known land invertebrate, a {{w|Arthropleura|2.6-m (8.5-ft) millipede-like animal}}; the largest-ever known flying insect, resembling a {{w|Meganeura|dragonfly with a wingspan of ~75 cm (30 in)}}; and a {{w|Pulmonoscorpius|70 cm (2 ft 4 in) scorpion}}.
|-
|{{w|Permian}}
|299-252
|Pangea
|Google "The Great Dying"
|{{w|Pangaea}} was the most recent supercontinent containing nearly all of Earth's landmass. The Great Dying, more formally known as the {{w|Permian-Triassic extinction event}}, occurred at the end of the Permian and is the most severe of Earth's {{w|Extinction_event#The_"Big_Five"_mass_extinctions|'Big Five' mass extinction events}}. In it, 81% of marine species and 70% of terrestrial vertebrate species were wiped out.
|-
|{{w|Triassic}}
|252-201
|Tanystropheus
|Damage to Canada still visible from space at Manicouagan
|{{w|Tanystropheus}} was a basal archosaur (not a dinosaur) with a proportionally long neck. {{w|Manicouagan Reservoir}} is a ring-shaped lake, the remains of the crater caused by a 5-km (3-mi) asteroid hitting {{w|Quebec}}.
|-
|{{w|Jurassic}}
|201-143
|Birds
|Parasitoid wasps
|Birds are cool{{Citation needed}}. Parasitoid wasps are not; their reproduction cycle is such a grisly process that it caused a {{w|Ichneumonidae#Darwin_and_the_Ichneumonidae|crisis of faith}} among 19th-century European scholars.
|-
|{{w|Cretaceous}}
|143-66
|Raptors
|Raptors
|[[:Category:Velociraptors|Raptors]]
|-
|{{w|Paleogene}}
|66-23
|Pretty horseys!!!
|Paleocene-eocene thermal maximum
|The {{w|Paleocene–Eocene Thermal Maximum}} was a time where the global average temperature rose by around 5-8 °C is a relatively short period of time.
|-
|{{w|Neogene}}
|23-2.6
|Forests of Dracaena dragonblood trees
|Zanclean flood
|The {{w|Zanclean flood}} is theorized to be the flood that refilled the Mediterranean Sea.
|-
|{{w|Quaternary}}
|2.6-present
|Burrito invented
|Whoever picked the name for the third period of the Cenozoic
|Randall jokes that, in the last 2.6 million years, his favorite moment was the invention of the {{w|burrito}}, rather than many other, much more significant discoveries. The precise origin of the burrito is not known, but the {{w|Maya civilization}} used to make food resembling burritos as early as 1500 BC.
The third period of the {{w|Cenozoic}} Era is the Quaternary era, named by Jules Desnoyers in 1829. This naming is controversial, as the {{w|International Commission on Stratigraphy}} is proposing to abolish it.
|}

==Transcript==
{{incomplete transcript|Don't remove this notice too soon.}}

{{comic discussion}}<noinclude>
[[Category:Charts]]
[[Category:Geology]]
[[Category:Velociraptors]]
[[Category:Animals]]
[[Category:Food]]
[[Category:Comics featuring Cueball]]

Talk:3106: Farads

2025-06-28T21:03:23Z

Bicorn:

Who wrote this description? It's complete nonsense. A capacitor can't throw a stone. A 1 F capacitor is also not remotely dangerous unless it's charged to a high voltage — except that a 1 F capacitor and a 0.01 F capacitor can be charged to essentially the same maximum voltage!

Unlike other units of measure where a single unit is non-extreme, "The capacitance of the Earth's ionosphere with respect to the ground is calculated to be about 1 F." [https://en.wikipedia.org/wiki/Farad] Most capacitors in practical use are measured in pico, nano, or micro farads. 03:04, 25 June 2025 (UTC)

Please note that the pound, shown in panel 2, is not an SI unit. The corresponding SI unit is the kilogram; an item with a mass of one kilogram is still commonplace. [[User:Troy0|Troy0]] ([[User talk:Troy0|talk]]) 03:11, 25 June 2025 (UTC)
:I added Trivia to mention that (and another thing), sorry that I didn't read here first but I think I've covered your thoughts on the subject. [[Special:Contributions/82.132.246.160|82.132.246.160]] 13:07, 25 June 2025 (UTC)

When my father was a young engineer, the old guys would haze the new kids by asking them to fetch a "one farad capacitor". But everybody in the lab said "Sorry, I ran out, go ask Fred on the top floor", "Go ask Tom in the basement", "Try Peter's Parts on Vine St", etc--- give the kid a run-around. The joke was: at the time, 1F was likely large than a large garbage can and many hundred (non-SI) pounds. But the world changed, and in recent years you can easily buy 1F @ 16V, about the size of a soup can, to smooth car sound power feeds. --[[User:PRR|PRR]] ([[User talk:PRR|talk]]) 03:27, 25 June 2025 (UTC)

:[I used to work with a guy who'd fall for all of the gags, going off to fetch striped paint, a glass hammer (there are such things in fact), a spirit level bubble, etc. Turns out he'd just goof off, completely aware he was on a wild goose chase.] {{unsigned ip|81.109.188.229|19:47, 27 June 2025}}

This explanation would benefit from some elaboration on how and why supercapacitors are dangerous. [[Special:Contributions/195.252.226.234|195.252.226.234]] 04:41, 25 June 2025 (UTC)

Funnily enough, the wikipedia page for "Farad" (https://en.wikipedia.org/wiki/Farad) currently has a 1 farad supercapacitator as the title image. It looks pretty unassuming. [[User:Mouse|Mouse]] 08:54, 25 June 2025 (UTC)

Top of the page says June 23 even though it looks like this came out on June 25. Should it be changed? [[Special:Contributions/85.76.9.43|85.76.9.43]] 05:15, 25 June 2025 (UTC)
:Randall-time, it was 24/Jun (or Jun/24, being leftpondian with potentily mixedendian dates). It's not unnown for it to be an early-hours-of-day-after (EST) release, though late-hours-of-day-after is rather unusual. I'm guessing awkward commitments took over, perhaps even the prescheduled timer (if left 'in charge', not having even been put to the test in a while) didn't work when/how it should have.
:We've also had surpisingly ''early'' releases (noon or earlier, UTC, making it very-early-on-day-of-release), but I haven't any specific memory of it being so early that it ended up ''preceding'' the scheduled day (off-schedule additions don't count), other than perhaps when he was currently on a book-tour and (e.g.) in Europe so probably doing his prefered time-of-day (or when it was most convenient for his schedule) in UTC/UTC+1/UTC+2 'mode', though it was still "yesterday" back home.
:Best suggestion is to see when [[3107]] comes out. If it's a Wednesday(ish)-compatible time, this was just overdue for ...reasons. But if it's Friday(ish), then we can re-examine its true position (with much arguing, I suspect) in the schedule.
:It ''could'' also be an attempt to subtly shift what number pops up when (I think a past "whole week series", or two, were conjectured to alter the numbers to reasonably engineer the landing of [[404]] upon April 1st), but that's probably beyond speculation until we at least can assess what has happened by the end of this week. (''Then'' start looking for what numbers land (near) where, up to arbitrary points in the future.)
:Also something to add to Trivia, ''when'' we can rule out some of the possibilities (or be prepared to be wrong/overly-comprehensive, like here, and remove the wronger bits later). [[Special:Contributions/82.132.246.160|82.132.246.160]] 13:07, 25 June 2025 (UTC)
::The official archive at https://xkcd.com/archive/ lists it as released at 2025-6-23. We should follow that listing, as we have done before at (vary rarely) delayed comics. [[Special:Contributions/2001:16B8:C731:2E00:9AC:BBD8:8775:315D|2001:16B8:C731:2E00:9AC:BBD8:8775:315D]] 15:34, 25 June 2025 (UTC)

I agree with [[User:Troy0|Troy0]] that having a non-SI unit in there (1 pound) is incongruous, and it should instead be a sugar crystal weighing 1 gram. [[Special:Contributions/121.98.227.79|121.98.227.79]] 06:52, 25 June 2025 (UTC)

"most consumer electronics use at most a nanofarad" -> nah... Several hundreds of microfarads are quite common. But so are tens-of-picofarad, mostly in HF/RF filters etc. Calculating an average over all capacitors in all consumer electronics makes no sense anyway... But I'd say "Most consumer electronics use capacitors in the picofarad to milifarad range".
"To prevent static electricity from building lethal charge, unused supercapacitors are usually stored and transported with a "keeper", a steel or aluminum bar shorting the terminals." -> Static charge won't change the voltage of a 1 F capacitor much... V=q/C with small q and large C... The shorting is for high voltage capacitors that 'recharge' themselves trough {{w|Dielectric_absorption|dielectric absorption}}... Interesting, but completely different. -- [[User:Gautee|Gautee]] ([[User talk:Gautee|talk]]) 07:52, 25 June 2025 (UTC)
:Even a supercapacitor is not necessarily lethal. It depends on the voltage. A project I'm working on has a 6v supercapacitor (to keep the clock running for a few days when power is disconnected). And they're not even expensive parts. For example [https://www.mouser.com/ProductDetail/KYOCERA-AVX/SCMT32H755MRBB0?qs=l7cgNqFNU1iVPH0cf9oilA%3D%3D this one] is 7.5F (!) at 6v. They're not very large and only cost $9. Touching the terminals when it is charged will hurt a lot, but it will hardly kill you. [[User:Shamino|Shamino]] ([[User talk:Shamino|talk]]) 14:40, 25 June 2025 (UTC)
::It really doesn't (directly) depend upon the voltage, either. It's a function of the volts ''and amps'' (but ultimately, how much energy there is, and ''where'' it manages to go).
::Personal anecdote: Physics lesson (tertiary education level), one experiment used a High Tension Power Supply to provide a high (selectable) voltage to some equipment, already set up with a rope(-like) barrier around it that one had to stay beyond when it was powered up. HTPSU's selector-switch had a screw 'stop' to limit the selection to only 'very high' voltage (already way beyond 230+V mains, with generally up to 13A fuse). During a classroom break, I thought I'd see what results a 'ludicrously high' voltage would give, unscrewed the stop, turned the dial up beyond it, and from beyond the boundary-'barrier' turned the power on. *ZAP*, I actually got shocked! (Can't now remember if it blew a fuse/RCD, or if it was part of the experiment that a discharge naturally stopped it, it was decades ago and the finer details of the encounter are well and truly blurred, including what the activity was - but a Jacob's Ladder could well have needed thousands to tens of thousands of volts running through it, if it was that, or the HTPSU was ultimately capable of running one, rather than what 'low voltage' thing I was doing.)
::Hurridly turned it all off, possibly earthed the bit you had to remember to earrh when you were leaving it for the next person's turn, dialled it back down, reinserted the limiter-screw, went off on the break that the rest of the class (and supervising tutor) had gone off to. It would have been very low ampage (lucky for me), maybe also I only got a fraction of the discharge, sharing it with nearby lab-fixtures (sink/gas-taps?), etc, and it probably did not cross my body (the most dangerous effect) but I felt it (and remember not being sure from where the shock might have actually jumped).
::Nobody the wiser (''possibly'' the next experimenter found the fuse blown, when they tried to power up, but maybe even not that if was just temporarily RCDed at most), except maybe myself... Tended to respect 'screwstops' on dials from then on.
::And only other significant 'shock' I've ever had, apart from static ones resulting from man-made fibres in clothjng/carpets, was when I touched a plucked dandelion stalk (or similar) to an electric fence when ''much'' younger, curiosity getting the better of me in a slightly different scenario that turned out to be more shocking than I perhaps expected. Was I thinking it'd be a mere tingle, the current having to pass through a plant stem..? I think I already knew the old adage about "there are good electricians, bad electricians and dead electricians" - good ones have a current-detecting screwdriver-thingy (sufficiently high resistance), bad ones forget to bring one and have to test maybe-off wires with the back of their hand (if not off, muscles contract and contact quickly lost), dead ones ''grasp'' any mysterious wire and then ''can't let go'' until the power cuts for any other reason (high-rating household fuse, maybe, could be too late). OK, so there's some acinowledged inaccuracies (or historical assumptions) in the above, but the gist is pretty much there. [[Special:Contributions/82.132.244.34|82.132.244.34]] 15:47, 25 June 2025 (UTC)

We now have an exact answer to the question "how tall is Cueball?"--[[Special:Contributions/86.13.226.126|86.13.226.126]] 09:16, 25 June 2025 (UTC)
:Assuming that Cueball's holding the stick in a plane parallel to the comic frame. [[User:Legowerewolf|Legowerewolf]] ([[User talk:Legowerewolf|talk]]) 13:23, 25 June 2025 (UTC)
:If the stick really is parallel, Cueball's height is 1.78 m, or 5'10" for the Americans, or 9.02×106 ħc/eV for the Proxima b-ans. [[User:MinersHavenM43|MinersHavenM43]] ([[User talk:MinersHavenM43|talk]]) 15:19, 25 June 2025 (UTC)
::in my neck of the woods we usually use centimetres for people's heights. It's more convenient to not need to use a decimal separator. [[User:Bicorn|Bicorn]] ([[User talk:Bicorn|talk]])

In agreement with the first discussion point, this description remains low quality. It claims that after the unwarranted panic, Megan and White Hat "ask why he [Cueball] is carrying it [the 1-farad capacitor] around." This does not occur at any point in the comic or the Title Text, and should be removed. [[Special:Contributions/198.147.146.254|198.147.146.254]] 10:21, 25 June 2025 (UTC)

I'm sure the Farad is going to drive all sorts of commentary. My nitpick with the description: a 1F 30V+ capacitor can be held in hand (e.g. Cornell Dubilier DSM105Q030W075PB, Nichicon LNR1V105MSE). I don't recall the hazard criteria for stored energy right off, so I can only say that @30V there is no shock hazard in dry environment human handling, but the energy stored still present other hazards (e.g. fire or burns from conductors) [[Special:Contributions/12.171.61.178|12.171.61.178]] 14:39, 25 June 2025 (UTC) JourneymanWizard

Could the 1V battery be not a 1.5V alkaline battery, but a 1.1V lithium battery? Still somewhat discharged, but not nearly as much. [[Special:Contributions/2600:1009:B092:310F:4D22:1073:190A:E328|2600:1009:B092:310F:4D22:1073:190A:E328]] 17:04, 25 June 2025 (UTC)

"This litre of water is at 1 ''T''P" [[Special:Contributions/60.240.13.138|60.240.13.138]] 22:30, 25 June 2025 (UTC)

For different capacitors of a given physical size, what is the approximate relationship between capacitance and max voltage, all other factors also being equal? Simple inverse? Is it even a reasonable question to ask? Clearly, a gigantic capacitance and low voltage isn't dangerous; a tiny capacitance and extremely high voltage also isn't, if for no other reason than that it would discharge through the air. [[User:BunsenH|BunsenH]] ([[User talk:BunsenH|talk]]) 00:39, 26 June 2025 (UTC)

Although he threw in one pound, I think the point is that some base metric units are impracticaly large or small. The MKS system has a kilogram as a "base" unit rather the gram. The CGS system used grams but centimeters instead of meters. Nobody uses ares or bels. [[Special:Contributions/2600:8800:4880:66B:809:D867:2F4C:D77A|2600:8800:4880:66B:809:D867:2F4C:D77A]] 03:41, 26 June 2025 (UTC)

I'd just like to point out that the confidence with which the explanation declares the capacitor to be low energy and therefore safe is exactly the sort of confidence that gets you electrocuted.[[Special:Contributions/2602:FF4D:128:D56:8114:9FE5:5A4D:499F|2602:FF4D:128:D56:8114:9FE5:5A4D:499F]] 16:19, 26 June 2025 (UTC)
:Yes, and "low-energy" needs definition. It's easy to find caps in the ballpark of 1F, >30V rating, hundreds of milliohms ESR, under $50, and small enough to easily hold in your hand. This could have an energy around 1000 J and could supply tens of amps for a significant fraction of a second. It's not as dangerous as, say, a grenade, but enough that I would be careful to avoid accidental self-discharge, especially across the body. And this assumes that the previous user didn't charge it *above* the rated voltage! [[Special:Contributions/174.126.217.139|174.126.217.139]] 17:46, 26 June 2025 (UTC)

3083: Jupiter Core

2025-04-30T16:50:04Z

Bicorn: note on the diamond core idea

{{comic
| number = 3083
| date = April 30, 2025
| title = Jupiter Core
| image = jupiter_core_2x.png
| imagesize = 581x443px
| noexpand = true
| titletext = Juno mission data suggests that Jupiter actually contains Matryoshka doll-style nested copies of every other planet in the Solar System.
}}

==Explanation==
{{incomplete|This page was created recently by a BOT IN THE CENTER OF JUPITER. Don't remove this notice too soon.}}

{{w|Jupiter}} is the largest planet in the {{w|Solar System}}, the fifth planet from the Sun, and the closest-in {{w|gas giant}}. The core of the planet is hidden by an enormous gaseous atmosphere, and this comic lists a number of theories about the structure of the core. The first two are theories that are or have been held by reputable scientists, while the rest are ridiculous ideas from Randall's mind.

{|class="wikitable" style="margin:auto"
|-
!Number Jupiter!!Caption of Jupiter!!Explanation
|-
|1||Diffuse mix of heavy elements and metallic hydrogen||The {{w|Juno mission}} data supports this structure.
|-
|2||Rocky core with metallic, hydrogen mantle||This was one of the leading proposals prior to the Juno mission.
|-
|3||Valuable treasure|| Indecipherable objects that may be gemstones or precious metals, surrounded by dollar signs. May be a reference to the occasionally proposed idea that gas giant cores might be composed of diamond, famously used in Arthur C. Clarke's ''{{w|2010: Odyssey Two}}''.
|-
|4||Emergency backup Earth||This would be a copy of the Earth that can be put into place once we finish destroying our planet. In popular science Jupiter is often described as a "protector" of Earth since its large gravitational field attracts asteroids that could otherwise hit Earth. This could be Randall's take on this claim in that it has a backup Earth in case everything else fails.
|-
|5||Regular planet pretending to be a gas giant to avoid attention||The joke here is that there is secretly a regular planet hiding inside Jupiter that is shy and does not want attention, so it pretends to be a gas giant. Of course, planets are not shy in real life, as they do not have feelings.{{citation needed}}
|-
|6||Hard ball from avocado|| An avocado pit is the seed of the avocado.
|-
|7||Baby Jupiter, still gestating||Jupiter is so big because it's pregnant, and the core is a fetal planet.
|-
|8||No core; flat Earth conspiracists are wrong about Earth but right about Jupiter||{{w|Modern_flat_Earth_beliefs|Flat Earth}} is a debunked{{cn}} claim that the Earth is not actually spherical, but flat. This version of Jupiter proposes that while Earth may not be flat, Jupiter is, so it doesn't actually have a core. Both Earth-based astronomy and flyby missions disprove this.
|-
|9||Matryoshka doll (title text)||Since Jupiter is the largest planet of the solar system, it could contain all other planets nested inside one another. The order from largest to smallest would be Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, and Mercury. Jupiter is in fact so large that its volume is more than all other Solar System planets combined.
|}

==Transcript==
{{Incomplete|better phrasing needed}}

:Current leading theories for what's in the center of Jupiter.

:[Variations of Jupiter, except for the last are shown with about 1/8 of the planet chopped off to show the core.]

:[Jupiter]
:Diffuse mix of heavy elements and metallic hydrogen

:[Jupiter with a rocky core]
:Rocky core with metallic, hydrogen mantle

:[Jupiter with a pile of coins for a core]
:Valuable treasure

:[Jupiter with Earth for a core]
:Emergency backup Earth

:[Hollow Jupiter with a rocky planet in the middle]
:Regular planet pretending to be a gas giant to avoid attention

:[Jupiter with a smooth ball for a core]
:Hard ball from avocado

:[Jupiter with a small version of Jupiter for a core]
:Baby Jupiter, still gestating

:[Jupiter as a flat circle, with nothing chopped off]
:No core; flat Earth conspiracists are wrong about Earth but right about Jupiter

{{comic discussion}}

3057: Excusing Yourself

2025-03-02T23:42:36Z

Bicorn: Adding the alternate interpretation of BH's behaviour as suggested

{{comic
| number = 3057
| date = February 28, 2025
| title = Excusing Yourself
| image = excusing_yourself_2x.png
| imagesize = 740x334px
| noexpand = true
| titletext = The most awkward part is when you have to pause to put on your shoes before you continue rolling out the door.
}}

==Explanation==
{{incomplete|Created by AN EXTREMELY POLITE BOT - Please continue to tidy up the explanation. Do NOT delete this tag too soon.}}

This comic revolves around different degrees of 'politeness' to leave a gathering, various scenes replicating the end of a social event, possibly a dinner party, but with different outcomes.

The first panel shows [[Megan]] sitting at a table with [[White Hat]] and [[Ponytail]]. She suddenly realizes how late she's 'kept them up', and how she needs to go somewhere early in the morning. Despite this and the fact that sleep is essential,{{Citation needed}} she offers to help tidy up the house before she leaves, possibly the most polite you can be in this situation, as it does not suggest the reason for leaving is related to the quality of the gathering and suggests she would stay longer if not for other obligations.

The second panel shows [[Cueball]] at the same gathering, who says that he must leave due to the fact that he is tired and must sleep. This is considered less polite, as he does not offer to help clean up the way Megan did, and indirectly implies the gathering is no longer entertaining enough to merit staying up; or just that he is ''too'' tired to fully comply with social niceties, in an understandable manner.

Even less polite is the trickster and classhole [[Black Hat]], in the third panel, who excuses himself in typical Black Hat fashion. Instead of him saying that he alone is tired, he says that EVERYONE looks tired ''and'' bored. This is very impolite, especially in a social setting. It could be argued he is not being as rude as he ''could''since makes his departure less about his own desire to leave and more about the fact that the gathering has (allegedly) served its purpose; on the other hand, if he's just asserting that everyone looks bored based on little evidence he's actually being more rude by arrogantly presuming to speak for everyone.

The final panel shows three points in time, depicting an unfolding action. [[Megan]] kicks the table, sending the chair tipping backwards and dumping her onto the floor. She then proceeds to roll away from the table, and presumably outside the house. This is rude on multiple levels: she does not give the hosts any chance to wish her goodbye, provides no excuse as to why she is leaving (as if it should be obvious), actively makes more mess by spilling the drinks on the table, and draws significant attention to herself all the while. Moreover, it is a health risk as she may sustain a concussion from such a fall pictured in the comic where the head directly impacts the floor, unless she has {{w|Uke (martial arts)#Ukemi|specifically practiced}} {{w|Stunt#Practical effects|such maneuvers}}.

The title text adds to the general awkwardness of having to excuse yourself, when Megan has to stop rolling to put her shoes on before continuing. This interaction is also unusual since in the United States, where [[Randall]] resides, hosts are unlikely to request their guests to remove shoes at a house party, [https://www.cbsnews.com/news/most-americans-are-shoes-off-at-home/ despite a majority opting to not wear shoes in their own homes]. Therefore, there's a reasonable likelihood that Megan would have had her shoes on already and would not encounter this issue.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[Caption above the panel:]
:Ways to leave a social interaction:
:[An arrow pointing towards the right is shown below the caption. Caption above arrow:]
:Less polite

:[First Panel: From left to right, Ponytail, White Hat, and Megan are sitting at a table with half-full glasses on it. Megan is looking down at her phone.]
:Megan: Oh, gosh, I can't believe how late I've kept you up! I have to wake up early, so I should really go soon.
:Megan: Can I help tidy up?

:[Second Panel: White Hat and Cueball are sitting at a table (only the right half is shown, so Ponytail may be presumed to be in the left chair as in the first panel), on which there are half-full glasses and a plate.]
:Cueball: It's been great, but I'm tired and need to sleep.

:[Third Panel: White Hat and Black Hat are sitting at a table (again, Ponytail may be in the left chair), with two plates and a half-full wine glass at White Hat's spot. Black Hat's arm is resting on the back of his chair.]
:Black Hat: We're about done having fun, right?
:Black Hat: Everyone looks bored.
:Black Hat: And tired.

:[Fourth Panel: Ponytail, White Hat are sitting at the table. Megan is shown in a sequence of actions within the same frame.]
:[Action 1: Megan kicks the table at which she was sat, spilling the drinks on it, while simultaneously pushing her chair backwards, to topple it:]
:''Kick''
:Megan: Bye.
:[Action 2: Megan and her chair crash to the floor, with arm flung back.]
:''Crash''
:[Action 3: Megan tumbles away from the position she fell in, either in a backwards or sideways roll.]

{{comic discussion}}

[[Category:Comics featuring Ponytail]]
[[Category:Comics featuring White Hat]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Black Hat]]
[[Category:Social interactions]]

Talk:3057: Excusing Yourself

2025-03-02T18:10:03Z

Bicorn:

Hey look, a new comic! YAYYYYYYY! [[User:DollarStoreBa'al|DollarStoreBa'al]] ([[User talk:DollarStoreBa'al|talk]]) 16:39, 28 February 2025 (UTC)

Added the starts of a new explanation for people to edit in the future. It's nice being the very first stepping stone. [[User:DollarStoreBa'al|DollarStoreBa'al]] ([[User talk:DollarStoreBa'al|talk]]) 17:00, 28 February 2025 (UTC)

I have to say, I was actually at the receiving end of something similar to the last panel-sequence. At a meeting, I was reading the minutes of the previous meeting (or some other administrative thing that even bores ''me''), and one of the people sat opposite me deliberately pushed themselves back onto the floor (though didn't roll away, content to have made their 'point')... Clearly unimpressed with my contribution. But it was standard meeting stuff that needed to be done so... I can't remember quite where I went from there (it was 30 years ago!), but I probably gave 'a look' and continued. Possibly extemporised/varied my delivery as he got back up and everyone else recovered from being temporarily distracted by his antics. (Which I suspect was planned, not ''totally'' spontaneous.) [[Special:Contributions/172.71.26.36|172.71.26.36]] 01:24, 1 March 2025 (UTC)

I've found the 'shoes' thing to vary by region and culture within the USA. In Hawai‘i, "ay, no leave shoes on in da house, brah!" In New England, and perhaps in northern-tier states generally, the shoes stay on, though the polite thing is to leave the overshoes on the porch, and/or make sure that the shoe soles get passed over the door mat. [[Special:Contributions/162.158.90.24|162.158.90.24]] 05:56, 1 March 2025 (UTC)

Absolutely loving the 'citation needed' after the sleep note. --[[User:DollarStoreBa'al|DollarStoreBa'al]] ([[User talk:DollarStoreBa'al|talk]]) 06:07, 1 March 2025 (UTC)
:Was wrongly positioned, regarding punctuation, though. Fixed that. [[Special:Contributions/172.70.86.157|172.70.86.157]] 08:44, 1 March 2025 (UTC)

;Is it Danish?

I labeled the panel 4 character as Danish, since she's being more rude than Black Hat and Megan is already present. Remind me, are there definite stylistic differences between Megan and Danish's hairstyles that are/aren't present here? --[[User:Jacky720|Jack]] ([[User talk:Jacky720|t]]|[[Special:Contributions/Jacky720|c]]) 18:05, 28 February 2025 (UTC)
:I don't know. From what I can tell, there are no stylistic changes between Megan and the Mystery Woman in this comic. Edit: I've just looked at [[2608: Family Reunion]]. Both Megan and Danish are present. Danish appears to be slightly shorter than Megan. However, I can't really see any difference in height between them. In [[1014: Car Problems]], Danish is the one reacting to Megan's slideshow. Danish appears to have longer hair than Megan in this comic. I also see no difference in hair length. [[User:DollarStoreBa'al|DollarStoreBa'al]] ([[User talk:DollarStoreBa'al|talk]]) 18:29, 28 February 2025 (UTC)
: I can't see any major differences at the moment in this comic, but it makes sense for it to be Danish [[User:Firestar233|guess who]] ([[User talk:Firestar233|if you desire conversing]] | [[Special:Contributions/Firestar233|what i have done]]) 19:24, 28 February 2025 (UTC)
:well, I changed it and ... well, just look [[User:Bb777|Bb777]] ([[User talk:Bb777|talk]]) 02:28, 2 March 2025 (UTC)
:{{Quote|are there definite stylistic differences between Megan and Danish's hairstyles that are/aren't present here?}}
:Yes, there are! Here are some quotes from the [[Danish]] and [[Megan]] character pages:
:{{Quote|Megan is distinguished by her black shoulder-length hair which generally appears to be parted in the middle in front and is draped behind what are presumably her (undrawn) ears. It is shorter than the character of similar appearance, Danish.}}
:{{Quote|[Danish] is similar in appearance to Megan but has distinctly longer hair.}}
:Here, Megan has short hair in both panels.
:{{Quote|[Danish] mainly appears in comics together with Black Hat, which is the most certain giveaway that a long-haired woman is Danish rather than Megan.}}
:In this comic, she isn't accompanied by Black Hat. I have edited the page to fix this issue. --[[User:FaviFake|FaviFake]] ([[User talk:FaviFake|talk]]) 08:40, 2 March 2025 (UTC)

:: Came here to ask the same thing in the hope that the beloved Danish had returned. I agree it's double Megan, so a missed opportunity by Randall. In addition it's not caustic misanthropy in the final panel, merely introvert desperation. [[Special:Contributions/162.158.33.252|162.158.33.252]] 08:44, 2 March 2025 (UTC)
:::Agree, her last proper appearance was [[2045|3 years ago]]. Maybe he used Megan because the hair would have been too hard to draw? --[[User:FaviFake|FaviFake]] ([[User talk:FaviFake|talk]]) 08:52, 2 March 2025 (UTC)

I would argue that Black Hat claiming to speak for everyone doesn't necessarily make him less impolite. I've known people who always talk as if their opinion represented a consensus, and it can come off as very arrogant. [[User:Bicorn|Bicorn]] ([[User talk:Bicorn|talk]]) 18:10, 2 March 2025 (UTC)