explain xkcd - User contributions [en]

3044: Humidifier Review

2025-01-30T05:50:20Z

172.70.210.52: Modified top of transcript

{{comic
| number = 3044
| date = January 29, 2025
| title = Humidifier Review
| image = humidifier_review_2x.png
| imagesize = 285x287px
| noexpand = true
| titletext = They should add a little sticker that certifies that the humidifier supports water conservation, but in the sense of energy conservation or momentum conservation.
}}

==Explanation==
{{incomplete|Created by a BOT THAT USES TOO MUCH ELECTRICITY. Do NOT delete this tag too soon.}}
This comic shows a review of a {{w|humidifier}}, which complains that it uses too much water to increase the humidity of the room to 45%. However, aside from small efficiency improvements (and [[2710: Hydropower Breakthrough|machinery made by Beret Guy]]), it is impossible to reduce the amount of water used to humidify the room, as the law of {{w|conservation of mass}} states that the amount of matter in the universe must stay constant. Therefore, the amount of water used by the humidifier must be at least the amount gained by the air.

This analysis is oversimplified, since humidity (when given as a percentage measure such as the stated 45%) is relative to the water capacity of the air at its current temperature. Thus, a humidifier could also increase relative humidity by cooling the air, even using no water at all.

Other examples of commonly used, commonly reviewed household devices whose operational efficiency is limited by the laws of physics themselves include {{w|space heater|space heaters}}, {{w|electric water boiler|electric kettles}}, {{w|air conditioning|air conditioners}}, and {{w|refrigerator|refrigerators}}. For instance, a space heater cannot produce more heat than the electrical energy it consumes, as dictated by the laws of thermodynamics. Similarly, an electric kettle cannot heat water with less energy than the amount required to raise its temperature, due to the specific heat capacity of water. Air conditioners and refrigerators operate by transferring heat rather than creating "cold," and their efficiency is constrained by the {{w|Carnot cycle}}, which defines the maximum possible efficiency of a heat engine.

The joke in the title text is based on different senses of the word "conservation". To most people this refers to reducing wasted use of some material, e.g. "water conservation" means avoiding waste of water. But to physicists, it means that some quantity in a system stays the same; for instance, conservation of energy means that energy can neither be created nor destroyed. For many years, most appliances have had {{w|Energy Star}} stickers that indicate their impact on the environment; by adopting the physicists' sense, they can trivially say they support water conservation.

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

:[A product review appears within a panel. At the top left is a small drawing of a humidifier within a rectangle. To the right of that rectangle, the following text appears:]
:HydroPro Humidifier
:[A line of illegible text appears below the product name, followed by a shorter line of illegible text within a rectangle.]
:Reviews
:[A horizontal line separates the above from a small close-up drawing of Hairy in a circle, with two lines of illegible text to his right.]
:[(3/5 stars)] '''Good but inefficient'''
:It keeps the humidity at 45% pretty well. I'd give it 5 stars if it didn't use so much water.

:[Caption below the panel:]
:My favorite reviews are the ones that penalize products for not violating the laws of physics.

{{comic discussion}}
[[Category:Physics]]
[[Category:Online reviews]]
[[Category:Comics featuring Hairy]]

Talk:2967: Matter

2024-08-04T10:33:03Z

172.70.210.52: reply

This one is a head-scratcher. Do skateboarders call "anti-" things goofy? What's the deal with that Dirac statistic? [[Special:Contributions/162.158.154.31|162.158.154.31]] 23:47, 2 August 2024 (UTC)
:It's like being a 'southpaw' boxer (or at least being able to stand the opposite way, maybe in order to flip/spin the board the opposite way from what you would end up kicking it normally).
:The Dirac thing is... well, quantum physics has various uses/restrictions upon spin (and colour, etc) that isn't really physical spin (or colour) as we know it, but sort of means a kind of particle-based rotational momentum, which has to be conserved/transfered/agree in various quantum interactions (and is a quantised state, meaning that only certain spin-values can exist in a given situation).
:Both the skateboarding and the elementary physics issues are (in their own way) rather technical matters, and I know a lot more about one than the other (but think I understand the other a lot more, from just reading up on it, than I know I actually understand the original one based on what I actually was taught). [[Special:Contributions/172.70.162.186|172.70.162.186]] 00:03, 3 August 2024 (UTC)
:''"Do skateboarders call "anti-" things goofy?"'' FWIW, I first heard 'goofy' in the 1960s skateboard fad, using your left foot where the right foot normally goes. It appears this was 2 or 3 years before Mr Hawk was born, so it isn't his invention. I would wonder if surfers (Hawaii and California) got goofy even earlier. [[User:PRR|PRR]] ([[User talk:PRR|talk]])
:: Looks like a fair summary: [https://www.surfertoday.com/surfing/where-does-the-term-goofy-footed-surfer-come-from Goofy Foot] --[[User:PRR|PRR]] ([[User talk:PRR|talk]]) 02:21, 3 August 2024 (UTC)
::: I first heard the term "goofy foot" back in Skate or Die on the NES. [[Special:Contributions/162.158.212.133|162.158.212.133]] 07:59, 3 August 2024 (UTC)

I'm way over the hill, and that linked 20 minute video on spin was the first explanation of that quantum number which seemed fully satisfactory and didn't leave me feeling like I was missing something crucial. https://www.youtube.com/watch?v=pYeRS5a3HbE&t=18m30s "The spin number characterizes how fast the state of a particle changes when we rotate it in space." WHERE HAS THAT EXPLANATION BEEN ALL MY LIFE?!?! [[Special:Contributions/172.68.22.90|172.68.22.90]] 04:56, 3 August 2024 (UTC)
:Spin is a terrible name, it should be "twist factor" for example. It's a derivative unit error, like calling acceleration in terms of speed. [[Special:Contributions/162.158.90.198|162.158.90.198]] 07:58, 3 August 2024 (UTC)

Problem loading previous comic, I get MediaWiki error. [[User:SDSpivey|SDSpivey]] ([[User talk:SDSpivey|talk]]) 17:15, 3 August 2024 (UTC)
:Can't replicate that, and doesn't sound like the kind of errors I might get (504s, "sorry too busy"-style message, etc). Is it still happening for you? [[Special:Contributions/172.70.85.18|172.70.85.18]] 19:23, 3 August 2024 (UTC)

This part doesn't make any sense to me; was this section AI generated? "That is why it is very difficult to compress matter based on fermions and even to get goofy matter (which are not identical particles), as they should be brought in contact with in the comic, near enough or mixed enough with the normal matter."
[[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 21:15, 3 August 2024 (UTC)
:Reverted as an incorrect and confusing attempt to extend the panel joke into the title text explanation. That never goes well. [[Special:Contributions/172.71.150.237|172.71.150.237]] 21:47, 3 August 2024 (UTC)

So in skateboard, does goofy just mean "left foot" or does it mean "non-dominant foot". Like, would a left handed skater be skating goofy "normally", or is goofy for them, using right foot?
:Left, because it's described in the frame of reference of observers. [[Special:Contributions/172.70.214.34|172.70.214.34]] 07:35, 4 August 2024 (UTC)

Have made a new [[:Category:Skateboard]]. There have for a long time been one for Electric Skateboard but I found 10 with regular skateboards being referenced. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 09:08, 4 August 2024 (UTC)

The extra spacing in the Feynman diagram on the blackboard explains why most antimatter was annihilated. [[Special:Contributions/172.69.135.89|172.69.135.89]] 10:00, 4 August 2024 (UTC)
:Given an initial universe with equal parts matter and antimatter plus a slight asymmetry (50% + e), the mutual annihilation of matter and antimatter would leave behind a residual amount of matter proportional to the asymmetry e. In the extremely dense early universe, this annihilation would be nearly complete, ensuring that almost all antimatter and a corresponding amount of matter annihilated into energy, leaving a tiny excess of matter. Thus, the observed baryon asymmetry today can be explained by this initial slight asymmetry, as even a minuscule e would result in a predominantly matter-filled universe post-annihilation. [[Special:Contributions/172.70.210.52|172.70.210.52]] 10:33, 4 August 2024 (UTC)

2963: House Inputs and Outputs

2024-07-25T21:34:28Z

172.70.210.52: /* Explanation */ ce

{{comic
| number = 2963
| date = July 24, 2024
| title = House Inputs and Outputs
| image = house_inputs_and_outputs_2x.png
| imagesize = 740x684px
| noexpand = true
| titletext = People think power over ethernet is so great, and yet when I try to do water over ethernet everyone yells at me.
}}

==Explanation==
{{incomplete|Created by a possible reference to [[1037: Umwelt]] in panel 16 - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

This is another comic in a series depicting {{w|confusion matrix|confusion matrices}}, similar to [[2420: Appliances]], [[2813: What To Do]] and [[1890: What to Bring]]. It is arranged as a table of five columns of conduits to and from a house, by five rows of resources and people, each of which typically enter, exit or both enter ''and'' exit the house via a least one of the identified conduits. The table cells have a green background for compatible methods of transit and a red tint is used for the more problematic pairings. Each panel can be read as "[row label] [entering and/or exiting] the house via the [column label]", for example, "Fresh water entering the house via the well".

{| class="wikitable" style="background-color: lightpink;"
|+ Explanations of the "House Inputs and Outputs" table cell drawings
! !! Well !! Garage !! Power lines !! Front door !! Septic tank
|-
! Fresh water (Input)
|style="background-color: palegreen;"| The purpose of a well is usually to pump fresh water into the home, primarily for drinking or washing. It may be unnecessary in many places if a reliable {{w|water supply network}} is available. || Long gone are the days of {{w|Labours_of_Hercules#Fifth:_Augean_stables|having to clean up after your primary mode of transportation}}, for most people. || Power lines conduct electricity, not water. The two functions are inherently dangerous if carelessly combined. Water can be used to cool high-energy lines, such as fast battery charger cables[https://www.connectortips.com/where-liquid-cooled-connectors-and-connectors-for-liquid-cooling-used-in-evs-faq/] and cables supplying electric arc furnaces, but not overhead residential power lines. || Many people prefer to control the amount of water they get, and the water may damage things inside the house. || Most people don't want anything they drink to contain (or go through pipes that have contained) sewage.
|-
! Cars (Input/Output)
| Most cars can't fit inside a well.
|style="background-color: palegreen;"| Garages are in fact built for the storage of cars and other similarly-sized vehicles. Placing a car in one will both help protect it from the elements and make it easier to access from inside your own home. || As of yet, cars cannot be transferred through power lines and require roads to travel on. However, this could significantly reduce travel costs. || Most cars can’t fit through doors, apart from the garage door. || Comedian {{w|Garrison Keillor}}'s 2008 ''More News from Lake Wobegon'' includes a story where an old septic tank is discovered to actually be a buried car.[https://theseriouscomedysite.com/comedy-cd-or-download/garrison-keillor-more-news-from-lake-wobegon/]
|-
! Electricity (Input)
| Wells are not a source of electric power, and attempting to obtain electricity from a well would likely contaminate its water supply. || In the United States, lightning is responsible for causing around 24,600 structure fires annually, resulting in $8 to $10 billion in losses.
|style="background-color: palegreen;"| Power lines are designed to facilitate the connection of individual homes to the broader local power network. [[Randall]] omits the fact that electricity can also be an output; e.g. houses with solar panels regularly export electricity too. || {{w|Benjamin Franklin}} invented the {{w|lightning rod}} to prevent lightning strike damage to structures. || As Knit Cap observes, septic tanks are not a source of electric power.
|-
! People (Input/Output)
|style="background-color: lightpink"| This depicts a view from inside a well, a very dangerous place for most people.{{Citation needed}} As a [[:Category:Comics with inverted brightness|dark scene]], it is drawn <span style="background-color: black; color: lightpink;">red-on-black</span>. The motif resembles poster art for the 2002 horror movie remake ''{{w|The Ring (2002 film)|The Ring}}'', which involves a girl left to die in a well who becomes a vengeful ghost (see also [[396: The Ring]]).
|style="background-color: palegreen;"| A person can enter and exit their home through a garage door, provided the garage has an internal door to the rest of the home. Not the best way to welcome unfamiliar guests though. || Overhead power lines to homes are generally not strong enough to climb, and attempting to do so incurs a very serious risk of electrocution.
|style="background-color: palegreen;"| The front door of a home is designed for entry and exit of humans and similarly sized items. || In general, people find crawling through waste unwanted. Also, the septic tank is not connected to the street.
|-
! Sewage (Output)
| Sewage in drinking water can cause disease. It is/was the main cause for most {{w|cholera}} epidemics.
|colspan=3| Sewage spills are smelly, disgusting, hard to clean, and can destroy carpets, floors, drywall, and property value.
|style="background-color: palegreen;"| A {{w|septic tank}} is an underground chamber through which wastewater flows for basic {{w|sewage treatment}}.
|}

The title text references {{w|Power over Ethernet|power over ethernet (PoE)}}, first implemented in the early 2000s, to provide electric power along with data on twisted-pair Ethernet cabling. A welcome development, it removed the need for many separate power supplies. While networked water delivery ("running water") is also a welcome development, doing so over ethernet cables would be extremely problematic, risking the several top points of failure, while providing limited amounts of water. However, again, fast electric vehicle charging cables and arc furnace power inputs are sometimes water-cooled.

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

:[A 5x5 grid of squares. The columns are labeled: Well, Garage, Power lines, Front door, Septic tank. Each row's label has an arrow and a house next to it. The rows are: Fresh water (horizontal arrow towards house), Cars (two-directional horizontal arrow and house), Electricity (horizontal arrow into house), People (two-directional horizontal arrow and house), Sewage (vertical arrow out of bottom of house).]

:Well, Fresh water: [green]
::Voice from house: Mmm! Refreshing!

:Garage, Fresh water: [red]
::''Fwoosh''

:Power lines, Fresh water: [red]

:Front door, Fresh water: [red]
::Voice from house: Stop it!
::''Fwoosh!''

:Septic tank, Fresh water: [red]
::Voice from house: Eww.

:Well, Cars: [red]

:Garage, Cars: [green]

:Power lines, Cars: [red]

:Front door, Cars: [red]
::Voice from car: Do you think I scratched the paint?

:Septic tank, Cars: [red]

:Well, Electricity: [red]
::Cueball's laptop: ⚠Low battery

:Garage, Electricity: [red]
::''BOOM''

:Power lines, Electricity: [green]

:Front door, Electricity: [red]
::''BOOM''

:Septic tank, Electricity: [red]
::Knit Cap: Why won't my console turn on?

:Well, People: [red (and black)]

:Garage, People: [green]
::Cueball: Bye!

:Power lines, People: [red]
::Cueball: Bye!

:Front door, People: [green]
::Cueball: Bye!

:Septic tank, People: [red]
::Cueball: Bye!

:Well, Sewage: [red]
::Voice from house: ''Why do I keep getting sick???

:Garage, Sewage: [red]
::Cueball: Oh no.

:Power lines, Sewage: [red]
::Cueball: Eww.

:Front door, Sewage: [red]
::Cueball: Oh ''no''.

:Septic tank, Sewage: [green]
::''Flush''

{{comic discussion}}

[[Category:Comics with color]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring Knit Cap]]
[[Category:Confusion matrices]]
[[Category:Multiple Cueballs]]
[[Category:Charts]]

Talk:2957: A Crossword Puzzle

2024-07-10T23:16:35Z

172.70.210.52:

compare https://www.buttersafe.com/2011/02/17/crosswords/ --[[Special:Contributions/162.158.158.236|162.158.158.236]] 20:50, 10 July 2024 (UTC)

it's *A* crossword puzzle for a reason ;) -- 21:05, 10 July 2024 (UTC)

i’m trying to table-ify it but i keep getting edit conflicted. [[Special:Contributions/172.71.30.93|172.71.30.93]] 21:24, 10 July 2024 (UTC)

Surprised something like "Jagged and loose Hawaiian lava flow (2)" couldn't be fit in (unless I've missed it). Maybe because there were no two-letter answers at all, of course. (I think... Again, maybe I'm missing them.) [[Special:Contributions/172.70.86.38|172.70.86.38]] 21:30, 10 July 2024 (UTC)

unfortunate that [https://tmbw.net/wiki/Aaa "antepenultimate track of They Might Be Giants' ''Glean''"] did not make it in --[[Special:Contributions/172.70.230.200|172.70.230.200]] 21:35, 10 July 2024 (UTC)
:And where is "Fonzie's catch-phrase"? Or does that end with a Y? [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 23:02, 10 July 2024 (UTC)

Did I use the calculator wrong, or 12356631 in base 26 equals 111111, not AAAAAA? [[Special:Contributions/172.69.90.180|172.69.90.180]] 22:33, 10 July 2024 (UTC)
:anyone using base 26 is probably likely to be using all 26 letters, instead of ten numbers and sixteen letters. contextless, i would usually assume any base has standard decimal digits, but liberties have already been taken here so why not (please sign)
::I wasn’t sure enough to comment, but it looks like he miscalculated. 26^5 + 26^4 + 26^3 + 26^2 + 26^1 + 26^0 = 12355631 = 111111 in base 26. To be AAAAAA it would have to be 123556310. Of course, maybe he’s using A through Z instead of the expected 0 through 9 followed by letters A through P, the way hexadecimal is. [[Special:Contributions/172.70.210.52|172.70.210.52]] 23:16, 10 July 2024 (UTC)

I'm surprised he didn't make this interactive, so you could type into all the cells to fill out the crossword. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 23:02, 10 July 2024 (UTC)

Talk:2916: Machine

2024-04-09T14:19:10Z

172.70.210.52:

rather late for an april fools comic innit? also there doesn't seem to be anything exciting in this one lol, none of the usual cool exploration easter eggs, as far as i could tell at least [[Special:Contributions/172.71.178.76|172.71.178.76]] 16:41, 6 April 2024 (UTC)Erfaniom

: We're exploring crowdsourced human creativity here, in a way, so it can be a lot more interesting then Randall's exploration comics, at least for me, because i did take two years of GCSE psychology and enjoyed it. [[Special:Contributions/172.64.238.130|172.64.238.130]]

: looks like the egg's on my face lmao, i think i was among the first people to make anything, so everywhere was under construction for me, i didn't even understand that it was like a crowd thing [[Special:Contributions/172.70.210.52|172.70.210.52]] 14:19, 9 April 2024 (UTC)Erfaniom

Just popped over using Chrome on Android and all I see is four "missing picture" logos spinning around, plus another down the bottom right... [[Special:Contributions/141.101.68.193|141.101.68.193]] 18:13, 6 April 2024 (UTC)
:Okay, followup: it behaves quite differently on the non mobile site. You get two entry points with red balls and yellow balls and you need to place the various gizmos to direct the balls to the correct exit point. Once enough have correctly passed to turn the red X into a green tick, you have the option to submit. If you do, once you have named your design it will be added to the grid with other submissions all of which exist to push red and yellow balls around. (if you come across "Memories of Ragnarok", that's mine) [[Special:Contributions/172.71.134.207|172.71.134.207]] 18:27, 6 April 2024 (UTC)
::The number of inputs appears to vary between 1 and 4, each of a different color, with one color-coded output for each. [[User:Claire Kholin|Claire Kholin]] ([[User talk:Claire Kholin|talk]]) 18:49, 6 April 2024 (UTC)

On the "machine" section, you see lots of "under construction cells". Perhaps this will develop as more are submitted. I notice the "under construction tape" has "DJIA" and "31415", perhaps a reference to "dow jones industrial average" and the first five digits of pi. [[User:Zeimusu|Zeimusu]] ([[User talk:Zeimusu|talk]]) 18:37, 6 April 2024 (UTC)
:Whenever someone submits a cell, it fills in one of the under construction cells. [[User:Claire Kholin|Claire Kholin]] ([[User talk:Claire Kholin|talk]]) 18:49, 6 April 2024 (UTC)

I wanted to add an image for each object, but do not have the necessary access, can someone who has access add the images that I linked in the table so they can be included? [[User:Claire Kholin|Claire Kholin]] ([[User talk:Claire Kholin|talk]]) 18:49, 6 April 2024 (UTC)

I found a discussion with some guy talking about the API at https://euphoria.leet.nu/room/xkcd/ ; this could be useful for the wiki.

<code>
[c+1] now time to try fucking with the api
[c+1] https://incredible.xkcd.com/
[userwithnoaccount] 404
[c+1] it seems there are numbered machines under incredible.xkcd.com/machine/x
[c+1] returns a grid of individual machinlets
[c+1] which are uids like 3a7af27c-5389-5dcb-b660-3feab6be2ceb
[c+1] they're stored at urls like incredible.xkcd.com/folio/3a7af27c-5389-5dcb-b660-3feab6be2ceb
[c+1] there appear to be 33 machines total
[c+1] the json it returns seems to refer to these as "versions"
[c+1] $ curl -s https://incredible.xkcd.com/machine/21 | jq ".version"
21
[c+1] there is a machine/0, but it's all null
[c+1] going to https://incredible.xkcd.com/machine/current redirects to the current machine
[c+1] $ curl -sL https://incredible.xkcd.com/machine/current | jq ".version"
35
[c+1] wait, is that the *total* number of mahcines?
[c+1] i would've thought there'd be more
[c+1] this whole think is rather esoteric
[c+1] Written in rust, too: https://rapier.rs/
[c+1] Uh oh.
https://i.hypercone.us/?v=8e283d
[c+1] HMMM
https://i.hypercone.us/?v=079f8f
[c+1] it seems there is no limit
[c+1] i've uploaded a ~50M title
</code>

[[Special:Contributions/172.70.57.146|172.70.57.146]]

Had quite a lot of fun, added a few 'successful' machines to the grid. Noted that whenever I try to use the Prism that (after a short delay) the comic-pane blanks and I need to refresh the page/get a completely new 'challenge' to start from scratch, so I'm just not using the prism at all (used most of the other items, in combination or 'just the one across the whole board', whichever seems most fun). But it doesn't seem to do what I'd like it to do, which is sort multiple colours from the same inflow into different outflow directions. Which would be ''very'' useful in a 'crossroads' situation, the general solution of directing them cross-path being too prone to random collisions. Also might be useful in the 'submitted machine grid', as I note that errors propagate, whereas adding a filter on all inputs would clean out (dispose of/send off to a valid gate?) the rogue balls. Anyway, gonna have to come back to this later when there's more time... Maybe then I'll even have something useful to add to the Explanation. [[Special:Contributions/172.70.163.31|172.70.163.31]] 19:03, 6 April 2024 (UTC)

The balls appear to be different weights. I just saw a machine that used fans to separate yellows from greens and blues in a sort of 'wheat from the chaff' manner to direct them to their correct outputs. I wonder what other hidden tricks are included. [[Special:Contributions/172.68.1.159|172.68.1.159]] 19:40, 6 April 2024 (UTC)

They're not all accepted, though it makes you think they are. Or something else more complex is going on we haven't realized yet. I made a machine that was working reliably, submitted it, and saw it on the overall grid. Reloading from a different browser I found the same location of the machine, with the same surroundings, but my machine had been replaced. It's nowhere else on the grid either. The first browser still shows it (but not after a reload with a cache clear). I'm not sure if there's some kind of "save" event that needs to happen beyond seeing your machine in the broader one, or if all user collaboration is an illusion, or if the system changes its mind about us somehow.

: Yeah, i've been seeing this too. Please tell me if you find any of my machines, images at https://i.hypercone.us/?v=22d562 , https://i.hypercone.us/?v=ad8e3a , and https://i.hypercone.us/?v=8d4d6a . I want to be one of the few to have added Catalan and Spanish to the grid. [[Special:Contributions/172.71.134.164|172.71.134.164]] 20:56, 6 April 2024 (UTC)

I've added some more observations to the page. Also, a guess which is too uncertain to put on the main page: The ball launcher for the yellows on the far left side misses a lot, and the yellow container isn't the one on the left. So I think the whole machine with crossing streams will result in the colors being sorted in their container order, and possibly have the streams combined and deposited at the bottom just above the containers. --[[Special:Contributions/172.71.147.100|172.71.147.100]] 21:07, 6 April 2024 (UTC)

has anyone seen the boat at the very bottom? [[User:Mushrooms|Mushrooms]] ([[User talk:Mushrooms|talk]]) 21:21, 6 April 2024 (UTC)

trying to see it on Firefox for Ubuntu and it just tells me to "visit xkcd.com to view" - THAT'S WHERE I AM?! Tried clearing website data (but not my entire cache) and that didn't help. Is there something I'm missing?

Oooh, just had one with four ball-entries (four colours) and ''three'' exits (one caters for two arrows). Pity it's rather complicated to get entries to exits (even if I can merge two of the streams). Might have to give up on it, but I'd like to have seen how it fits in with the 'submited grid'. i.e. someone else gets a two-colour introduction spot. [[Special:Contributions/162.158.74.119|162.158.74.119]] 22:37, 6 April 2024 (UTC)
:Me again. I'm just refreshing the page, looking at the pattern of entries/exits (just a dozen or so screens in, getting some repeats of pattern, indicating that it's going back to tiles it was suggesting before, probably depends on how many others are contributing and extending...)
:Found another 'double-colour' example. Two yellows ''from the same side'', which probably means that there's a two-yellows been asked to exit from the neighbour (will check shortly).
:Quickly adapting from my spreadsheet notation, "R, Y, G, B" in order, each "(Entry, Exit)", I've been using <dir> of L/R/T/B and a number (nominally percentage, though seems to include only values of 20, 30, 50, 70 and 80, so it ''might'' be more 1/6..5/6?) relating to the distance along from L to R (for T/B) or T to B (for L/R).
:This line is therefore (0,0)(L20+L70,R30+B70)(R80,L80)(T70,L50) ... no reds, two yellow pairings, a red pairing, a blue pairing. Would require at least two path-crossings (but I was going to calculate those things later, and double-colours might confuse my intended simple line-intersection calculation).
:...anyway, spent some time on this message, which might mean I'll get into a 'new batch' of available patterns as people have succeeded some of the challenges that I've been 'swiping left'. [[Special:Contributions/172.70.162.20|172.70.162.20]] 19:28, 7 April 2024 (UTC)
:...very next click: (0,0)(T30+L20,R20+R70)(R80,L80)(R50,B50), which is clearly the actual left-neighbour of the above. [[Special:Contributions/172.70.162.19|172.70.162.19]] 19:32, 7 April 2024 (UTC)
:Ok, stopped my refreshing to [https://imgur.com/a/OMFOmzy 'solve' a screen]. First of all I routed both yellows entries (right-upper and upper-right) to one yellow exit (middle-left) and gradually teased the greens across (lower-left to middle-right), as that way I was avoiding a criss-cross of balls, but the the other yellow exit (left-lower) was, of course, invalid.
:Changed it to drop one stream of yellows down towards the lower exit, across the rapidly firing greens (added a fan to filter away the occasional yellow that gets bounced over there, not much of an opportunity to filter falling-greens out of the yellow exit, so apologies to whoever gets the sceen below). Submited as "Two Yellows, One Green!", whether or not that'll save (apparently, I should continue to contribute and not refresh/close, or else the server will not keep the solution?).
:Interestingly, all four adjacent tiles are "Under construction", and if I scroll up... *DARN* the comic has blanked out (nothing there between the upper PREV/RANDOM/NEXT buttons and the lower ones, just whitespace). This may mean that it did not save. This is the kind of 'page crash' I get when I try using a Prism or get too many balls rattling around on top of a Black Hole. Perhaps it doesn't like that I'm scrolling into an Under Construction that shouldn't be there? (But then, why ''is'' it there?)
:Anyway, all extra information for everyone.
:I'll just refresh the page and go back and do some more entry/exit mapping, maybe? [[Special:Contributions/172.70.162.20|172.70.162.20]] 20:17, 7 April 2024 (UTC)

If you combine a bunch of these silly claw things in the middle by just spamming it, it begins to lag and do some chaotic collisions, even without balls colliding on it. It's curious how it does that seemingly randomly though. I wonder how calculations are added and if there's a tiny sprinkle of RNG. (Also, errors occur and say something about damaging recursion in the Rust programming language, so I guess we know how it was made. It's also pretty weird how there's not a lot of opening combinations? It's possible that the machine loops over in chunks of gears or something (that's what I'll call them). ([[User talk:Leo|talk]]) 13:15, 7 April 2024 (UTC)

If you place a black hole in the centre of a wheel, it makes the wheel behave unpredictably between resets. Sometimes it's almost normal, sometimes it's a lot faster than usual, and sometimes it's stopped but launches balls that touch it with extreme force. I was able to use this to submit a machine which didn't actually let a single ball through after being submitted. https://i.hypercone.us/?v=928bcd [[Special:Contributions/162.158.33.149|162.158.33.149]] 01:19, 7 April 2024 (UTC)

The page says that (and I have taken note of) the ball hue is ''coded'' to certain values, but is there a logic to those values that might be derived from the colour (either as RGB triplet or HSV/other colourspace definition). For example, the two ball-types with zero green component in their makeup are 'unit density' (green is far heavier "green+red" is far lighter, so it's not a simple relationship, unless it converts from °hue, in some way) and the only secondary colour exhibits non-zero drag. There's the possibility that it just derived from "we need different properties, we need different colours, we have no reason to connect either with other deliberately" or even some non-mathematical symbology (fire=red, water=blue(?), earth=green, air(/sunlight?)=yellow). But it makes me wonder what combination of properties cyan/magenta balls might have, if added. (Or is the choice of those four colours constrained, anyway? Though R/G colorblindness is already something of an accessibility failure, if anyone suffers that.) [[Special:Contributions/172.69.194.205|172.69.194.205]] 17:02, 7 April 2024 (UTC)

[https://pastebin.com/7PAiLnyF Python script to get the URL and title of each Cell in the current machine]

[https://pastebin.com/xBhywGde Result of running that script at the moment] (encoded with ROT13 because pastebin wouldn't let me save it otherwise)
:has anybody at all whatsoever been able to find their creation using this API? [[User:Bellydrum|Bellydrum]] ([[User talk:Bellydrum|talk]]) 21:58, 7 April 2024 (UTC)

[https://pastebin.com/jN5MP2za Result of running that script on the first 42 machines], at least on these it looks like the only difference is that one cell is added each time? [[Special:Contributions/172.71.99.195|172.71.99.195]] 17:22, 7 April 2024 (UTC)

I've submitted four now, none of which was accepted. I tend to spend a lot of time getting them just right. Any hints as to what the acceptance criteria might be? Or do I just stink at this?
[[Special:Contributions/172.69.59.204|172.69.59.204]] 19:47, 7 April 2024 (UTC)

There appears to be a new object: a cat that bats things that touch it.
[[Special:Contributions/172.69.214.39|172.69.214.39]] 20:17, 7 April 2024 (UTC)

Is anyone else experiencing the bug where prisms cause the comic to disappear (leaving only the white background where it was) after a while? It makes viewing the whole machine basically impossible. (On further testing it appears to be firefox-exclusive.) [[Special:Contributions/172.70.162.38|172.70.162.38]] 20:31, 7 April 2024 (UTC)
:I've had the "Prisms break things" from the beginning (before any practical content). As in, trying to use them in a design breaks things. But I ''did'' glance upon their occasional use in the 'view submissions grid'. Right now I'm suffering from "white only" issue (see my "multi-yellow" accounts, above). I ''am'' using Firefox, if that's indeed relevant to this issue, but right now I'm not near any other up-to-date browser I care to use. [[Special:Contributions/172.70.163.31|172.70.163.31]] 21:37, 7 April 2024 (UTC)
:I'm getting the same issue with black holes (which probably makes more sense - put a black hole there and you'd expect everything else to disappear :o) - except that on one occasion I was able to put about 6 black holes in before the 7th one vanished everything.[[Special:Contributions/172.69.194.121|172.69.194.121]] 09:15, 8 April 2024 (UTC)

Has anyone seen their own cell in the machine at all yet? A manual approval system is probably necessary for obvious reasons, but if so it does seem to be moving quite slowly.
[[Special:Contributions/172.69.65.24|172.69.65.24]] 02:58, 8 April 2024 (UTC)

How on earth is everyone seeing different parts of the grid? If I request "view machine" I can only see my own square, and the edges of everyone elses. Nothing else, definitely not all of the machine. [[Special:Contributions/172.68.64.149|172.68.64.149]] 21:11, 8 April 2024 (UTC)
::You should be able to click and drag the view around. [[Special:Contributions/172.71.242.54|172.71.242.54]] 21:41, 8 April 2024 (UTC)

Whoever designed the room entirely full of fans is evil - every time I scroll near it my entire browser freezes up and becomes unresponsive. And then the comic usually blanks.[[Special:Contributions/172.69.194.81|172.69.194.81]] 08:23, 9 April 2024 (UTC)

== Level scrolling bug ==

When one views the whole machine, and scrolls down far enough, everything just disappears, and the comic is completely unresponsive. Has anyone else seen this? [[Special:Contributions/198.41.236.152|198.41.236.152]] 20:38, 7 April 2024 (UTC)

:I'm now seeing the same issue, I wasn't before. (I'm using Chrome) [[Special:Contributions/172.70.162.20|172.70.162.20]] 21:06, 7 April 2024 (UTC)

::A hard refresh appears to have fixed this for me (same person as above). [[Special:Contributions/141.101.99.101|141.101.99.101]] 10:28, 8 April 2024 (UTC)

:I've been having this issue as well (I'm using firefox). Opening the site in Edge instead seemed to work around it for me, so it might only affect Firefox (and derivatives). [[Special:Contributions/172.70.163.31|172.70.163.31]] 21:27, 7 April 2024 (UTC)
::See also the 'firefox bug' comments currently immediately above this section. (Please don't ask me to start Edge up, I hate it, won't use it any more than the system requires me to...) [[Special:Contributions/172.70.163.31|172.70.163.31]] 21:37, 7 April 2024 (UTC)

:Update - I did a hard refresh so I could play around with the new additions and I'm no longer encountering the bug, even on firefox. I think the "white screen" bug is fixed now and you just need to hard-refresh to download the fixed JS instead of using the cached one. (same person as 172.70.163.31 and 172.70.162.38) [[Special:Contributions/172.70.86.16|172.70.86.16]] 11:16, 8 April 2024 (UTC)

==New Category: Ball Pit?==

What do you think about a new category for comics with [[ball pits]]? [[150]], [[219]], [[485]], [[498]], [[2916]]? [[Special:Contributions/162.158.134.229|162.158.134.229]] 21:50, 7 April 2024 (UTC)

== Prism Use? ==

Can the prism be used to sort balls by color? (or in any other way that is useful and different?) [[Special:Contributions/172.68.34.61|172.68.34.61]] 12:11, 8 April 2024 (UTC)
:From what I've seen, no. Though may be ''extremely'' susceptible to incident angle. As far as my own use has been, they seem to randomise the trajectory (possibly also do a total-internal-reflection, I've had balls bounce around and exit at ''really'' weird angles), but it's hard to collimate a feed of balls into a single exact track, even straight down from a ceiling-feed (if you have a ceiling feed directly over the floor exit, lucky you, it'll still occasionally perturb balls off to the sides just enough to be bounced out as a gate-miss, unless you add 'funnel' architecture of one kind or another). Oh, and when balls do a lot of 'internal bouncing' it often forced me to reload the comic (overloaded the physics engine?), so could not continue to tweak the same design.
:On the other hand, perhaps this was the ''intent'', and just code/browser failings made it work erratically. Maybe would be an idea to go back and retest for this (anybody who can), do a little !!science!! to be recorded and explained on the page. [[Special:Contributions/172.69.43.183|172.69.43.183]] 12:51, 8 April 2024 (UTC)

== Bugs and Exploits ==

You can use a sword to break the physics on the hinge thingy and create your very own "magnetic hill": https://imgur.com/a/IRZ0AlL [[Special:Contributions/162.158.134.108|162.158.134.108]] 13:02, 8 April 2024 (UTC)
:Hard to tell from that what other fans (perhaps) you've got completely off-clip.
:Those hinge-thingies can definitely be shifted by horizontal (outwith ball-weight pressures), but I've not found them to be reliable components as the "Stop" button (ball reset) seems to let those 'hinges' slring back to level, which might need a re-reset by moving them back past the thing that's holding them off-level.
:I have tried a few things with them:
:*'Ticker' mechanism, almost like a clock escapement, nudged by the rotating 'waterwheel', perhaps to try to release balls through a stream of other balls whilst keeping the path clear of collisions for each set, in turn.
:*'Batch dumper', accumulating a number of balls (above the 'hinge', behind a vertical bulkhead) until there's weight enough to 'open the hatch' and roll them out. (Again, an attempt to reduce collisions, by clumping batches together).
:*Finely configured inclines, by shoving something up into a free end of hinge with better angular resolution (but, as mentioned, this doesn't seem to want to 'hold', so probably would fail upon submission).
:...I had wondered if there was supposed to be a "falling anvil creates a catapult/ballista" idea behind the piece, but we don't ''have'' falling anvils (and definitely not in a repeating manner), and ball-powered catapult (esssentially "clown/acrobat jumps on one end of seesaw, clown/acrobat on other end flies up into the air") also doesn't seem practical.
:I'll try to recreate ''your'' design, work out if there's anything new about it, but right now looks like it's a fan-powered incline-raiser. [[Special:Contributions/172.70.162.38|172.70.162.38]] 14:23, 8 April 2024 (UTC)
:: No fans! Here's a wider view: https://imgur.com/a/xPJcsor
:: It survives the reset, because the balls falling on the lever push it down to the sword and it gets stuck there every time. But you need to place the sword just right to make the gravity bug happen. And even then it depends on the number of balls in some ways. [[Special:Contributions/172.68.243.27|172.68.243.27]] 14:46, 8 April 2024 (UTC)

== The USS Buoyancy ==

Guys. The Buoyancy. She ''floats''. When all four sets of balls reach the ball pit there aren't further additions. The boat starts floating on them. I've been watching it for a while. It seems she moves left and will probably end up escaping the ball pit. [[User:DL Draco Rex|DL Draco Rex]] ([[User talk:DL Draco Rex|talk]]) 20:44, 8 April 2024 (UTC)
:Update: A new row spawned in and it reset just before the Buoyancy could escape. Here's a screenshot I grabbed a while before the reset, she'd moved further left by the time the reset occurred. https://imgur.com/gallery/8UCASCu [[User:DL Draco Rex|DL Draco Rex]] ([[User talk:DL Draco Rex|talk]]) 20:51, 8 April 2024 (UTC)

== Added key combinations, found in source ==

ctrl+alt+b
ctrl+shift+option+d
wheel: arrow keys

== Fixed Number of Possible Machinelets? ==

I was resetting my browser to try and find new machinelet configurations, but there seem to be fewer and fewer as the game progresses. Hypothesis: the 'under construction' machinelets are set, and once one of them gets approved and added to the grid, that specific configuration of entrances/exits can't show up again.

== Advanced components? ==

How does one get access to the full set of components to build from? I'm only given planks, mallets, swords, scoops, anvils, bricks and fans. I never get any pillows, bumpers, cats, stick figures et cetera. Do they need to be "unlocked" through some achievement, or what? [[Special:Contributions/162.158.222.102|162.158.222.102]] 11:04, 9 April 2024 (UTC)

This caught me for a while as well. I have since discovered that the tool box has a scroll bar and can be scrolled down; that's where the others are hiding.