explain xkcd - User contributions [en]

Talk:2974: Storage Tanks

2024-08-22T22:02:26Z

Mjackson:

The symmetry of the truss intrigues me. Struts that are diagonal across the faces of the cuboids is normal, but is it a real thing to also use the body diagonal? Never seen that IRL, not sure if it makes sense from the statics. --[[Special:Contributions/172.70.247.82|172.70.247.82]] 22:16, 19 August 2024 (UTC)
: Struts as shown provide some left-right stability, but not as effectively as struts across the face would. They also provide some redundant front-back stability with the struts running along the faces. [[Special:Contributions/172.68.71.90|172.68.71.90]] 14:47, 21 August 2024 (UTC)
: I mentally modeled the flexibility modes, and it very much depends upon whether the verticals are solid (with their resistence to bending playing a big part alongside the incident horizontals'/diagonals' exactvmethod of attachment) or are just sections of rod between a suitable receiver-'node' at each junction.
: in particular, the strength of any one of the three 'boxes' (each level between adjacent horizontal cross-sectional perimeters) is somewhat less secure, as a single level can 'fold' sideways over each side's vertical-diagonal strut (along with the respective front/back horizontals, held 'square' by the internal cross-brscing). Only the continuation and linking with the other 'boxes' really guarantees any innate stability, and if each node is free-twisting then the likely first result of any failure is that the tower topples forwards and/or backwards as it folds up due to the unbraced facing and hindside quadrilaterals.
: But it does depend a lot upon the exact nature of the linkages (which can only be guessed at), and other failure-modes could involve node-slippage if they merely grip the cross-braces to the entirely top-to-bottom poles and there's potential for sliding there instead of primarily rotation (or over-stressed failure in any given length of rod).
: The support (or additional pressure) provided by the access staircase is also probably a factor. It could even be the most important bit in holding it up! ...if firmly anchored at the other end and robust enough in itself.
: I'd definitely add other diagonals (including opposite-type body-diagonals, perhaps tied to the existing one as they pass right across each other), just to be sure. The more the better, of course, but there's probably a limit through diminishing concerns. And too many diagonals primarily in a helical pattern could concentrate forces into a particular type of rotational failure if you also add too much brace-weight in doing so. [[Special:Contributions/172.70.163.120|172.70.163.120]] 15:07, 21 August 2024 (UTC)

Seems like a pretty menial job for the "head of security". I think he would delegate this to a security guard. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 00:47, 20 August 2024 (UTC)
: They may be head of a department of one.[[Special:Contributions/172.70.85.139|172.70.85.139]] 08:50, 20 August 2024 (UTC)
:: That's part of the joke, that the #1 concern of the Head of Security is calculus teachers wielding power drills for class demonstrations. [[User:Laser813|Laser813]] ([[User talk:Laser813|talk]]) 17:33, 20 August 2024 (UTC)

The explanation mentions there might be more complex calculus examples where the shape might not be a cylinder. I think some further explanation could be added that this does not change the pressure (hydrostatic paradox) but indeed change the rate of emptying the object. If differing cross sections are relevant at all. [[Special:Contributions/108.162.221.103|108.162.221.103]] 05:40, 20 August 2024 (UTC)
: Non-prismatic geometries are I think the ones being alluded to here, i.e a frustrum with the pointy end down will have a greater reduction in pressure for a given volume of flow towards the end than at the start, which may offset the reduction in absolute pressure. I've also seen examples where the flow rate is considered constant and the problem is to work out the fluid depth as a function of time, e.g. filling a pyramidal pool from a hose. [[Special:Contributions/172.70.58.4|172.70.58.4]] 16:44, 20 August 2024 (UTC)

Its the most difficult job in history, even the best workers couldn't stand 1 day as head of security.[[User:I HAVE NO NAME|I HAVE NO NAME]] ([[User talk:I HAVE NO NAME|talk]]) 05:55, 20 August 2024 (UTC)

I have to admit, I thought I knew calc as I had two semesters of it, but I had to look up what he meant by this. Ouch [[Special:Contributions/172.70.242.55|172.70.242.55]] 13:01, 20 August 2024 (UTC)student

If anyone could suggest something I can do for my class now that I can no longer drill holes in tanks, I'd appreciate the advice, thanks. [[User:Fephisto|Fephisto]] ([[User talk:Fephisto|talk]]) 16:18, 20 August 2024 (UTC)

Someone should do the math on the calculus problem as presented, as well as the algebra version. [[User:Laser813|Laser813]] ([[User talk:Laser813|talk]]) 17:33, 20 August 2024 (UTC)
: Randall, like all good mathematics textbook authors, left the problem as an exercise for the reader. Does this happen often enough to warrant a tag? [[User:Paddles|Paddles]] ([[User talk:Paddles|talk]]) 05:57, 21 August 2024 (UTC)
:: Yes... [[User:Transgalactic|Transgalactic]] ([[User talk:Transgalactic|talk]]) 10:10, 21 August 2024 (UTC)

Is there anyone else who thought the calculus teacher was abusing the tank as a model for the complex plane, demonstrating how to [https://en.wikipedia.org/wiki/Removable_singularity remove a singularity] from a holomorphic function by puncturing the plane? I wasn't confronted with that particular tank-emptying problem in high school, so my first encounter with "holes" in maths was in complex analysis. The title text was a mystery. [[User:Transgalactic|Transgalactic]] ([[User talk:Transgalactic|talk]]) 10:10, 21 August 2024 (UTC)

As a mathematician, I'm surprised I didn't know about this idea. (It's definitely not my field!) I actually thought the flow would be constant, an algebraic problem. Oh, I'm sure I saw these types of problems in Calculus (and I remember problems like this in Differential Equations), but I thought those were just to make the math more complicated, not based in reality... So is it the weight of the liquid remaining above the hole that is the source of the pressure (i.e., would it be the same if the top of the tank were open), or is it the air pressure in the tank as the volume of liquid decreases and volume of air increases? [[User:Mathmannix|Mathmannix]] ([[User talk:Mathmannix|talk]]) 11:08, 21 August 2024 (UTC)
:A sealed-top would change the dynamics (like trying to pour the contents of a 2 litre (or whatever the US equivalent is) pop/soda bottle, it will tend to 'glug glug glug' intermittently unless you: a) incline the bottle to allow an optimum amount lf free akr back into the emltying bottle or, b) initialise the up-ended emptying with a spin sufficient to create a 'waterspout' effect up through which the replacement air can (more) freely pass.
:Though there are other possible factors, in that example, including the potential pressure of any self-releasing carbonation pressure (e.g. giving the bottle a shake, or a foreign body, before releasing the 'pour') and/or squeezing/'milking' the soft plastic container strategically to create another form of pressurised expulsion.
:For the 'classical' problem, one should probably assume sufficient inward venting (either an open/part-open top or a second hole drilled near the top to effect this purpose) as well as a reasonably unexotic liquid (neither molasses, cornstarch-mixture, anything that is actually a very fine dry powder, anything that reacts significantly with/upon air, any liquid very close to its vapour-point nor ''specifically'' supercooled helium) or any additional elements (stirrers, baffles, spongey inners, inner membranes or the contents being a layered combination of imiscable liquids of different densities that may or may not react slightly all across the interface plane). Most things that aren't actually exotic (and even a few that are, and might warrant a warning /¡\) are close enough to water to treat as if just that, at least under the further assumption that we're working at or around Standard Temperature and Pressure. But a slightly different density, viscosity and surface tension (plus the nature of the container, e.g. extreme hydrophilic or hydrophobic inner coatings where water is involved) ''could'' (in combination) drastically change the actual outcome given enough of the right kind of simultaneous differences imparted. [[Special:Contributions/172.70.86.37|172.70.86.37]] 14:28, 21 August 2024 (UTC)
In order to remove calculus from the scenario one needs a pressurization system that keeps Pair + Pliquid, constant at the hole. This requires sensing the height of the liquid surface and increasing the air pressure as the surface drops, the relationship depending on the density of the liquid. [[User:Mjackson|Mjackson]] ([[User talk:Mjackson|talk]]) 22:02, 22 August 2024 (UTC)

2243: Star Wars Spoiler Generator

2019-12-19T01:10:47Z

Mjackson: SSC was *not* a linear accelerator!

{{comic
| number = 2243
| date = December 18, 2019
| title = Star Wars Spoiler Generator
| image = star wars spoiler generator.png
| titletext = The heroes seem to be gaining the upper hand until Darth Juul manages to flip the switch on the car wash control panel from 'REGULAR' to 'PREMIUM.'
}}

==Explanation==
{{incomplete|Created by DARTH KYLE}}
On December 20, 2019 (2 days after the publication of this comic), the final movie of the "Skywalker saga" of ''Star Wars'' films, ''{{w|Star Wars: The Rise of Skywalker}}'', will be released. It received a world premiere in Los Angeles on December 16, so there are lots of spoilers online, and also lots of people who want to avoid spoilers. Randall has created a flowchart that generates "spoilers" to the film, but as Randall probably has not seen the film (or, if he has, he doesn't actually want to spoil us), all of the so-called spoilers are nonsensical.

The formula for each spoiler is as follows: "In this Star Wars movie, our heroes return to take on the First Order and new villain '''[villain name]''' with help from their new friend '''[friend name]'''. Rey builds a new lightsaber with a '''[color]''' blade, and they head out to confront the First Order's new superweapon, the '''[superweapon name]''', a space station capable of '''[evil plan]'''. They unexpectedly join forces with their old enemy '''[character]''' and destroy the superweapon in a battle featuring '''[strange event]'''. P.S. Rey's parents are '''[character]''' and '''[character]'''".

The {{w|First Order (Star Wars)|First Order}} is the main antagonist group in the ''Star Wars'' sequel trilogy series. In ''{{w|Star Wars: The Force Awakens}}'', they use a superweapon in their base, Starkiller Base, to destroy the planetary system housing the headquarters of the New Republic, the democratic government which was formed after the Empire's defeat in ''{{w|Return of the Jedi}}''.

"Building a {{w|lightsaber}}" is one of the rites of passage for becoming a Jedi Knight. In the prequel trilogy, new Jedi build lightsabers as an official part of the journey towards Knighthood, and in the original trilogy, Luke Skywalker builds a lightsaber between ''The Empire Strikes Back'' and ''Return of the Jedi'' as part of his training with Yoda. Rey has used the lightsaber that Anakin Skywalker made and used (which Luke also used when he was a new Jedi) for the first two movies of the sequel trilogy, and so it would be thematically appropriate for her to build her own prior to the trilogy's final entry. Most Jedi's lightsabers are either blue or green, with a few notable exceptions (e.g. Mace Windu's purple lightsaber signifies his incredible combat prowess). Kyber crystals are aligned with the Light Side of the Force, so Sith must overpower and "bleed" their crystals before they will function for them, which causes their distinctive red color. Having a lightsaber of a color other than blue, green, or red is often seen in the ''Star Wars'' fandom as a sign of being a "Mary Sue", which is an accusation which has been made of Rey.

Another common plot point in ''Star Wars'' media is the construction, use, and destruction of a superweapon. These are inspired by stories and media of World War II, in which militaries sought to find, attack, and destroy critical elements of their enemies' resources and infrastructure, and meanwhile would construct elaborate defenses for themselves. The attack on the Death Star in particular is inspired by {{w|Operation Chastise}}, the "bouncing bomb" attack on Germany's hydroelectric power plants; Operation Chastise was dramatised in the 1951 book and 1955 film ''The Dam Busters'', which was [https://www.youtube.com/watch?v=lNdb03Hw18M very thoroughly homaged] by ''A New Hope''. The original trilogy of movies only had two Death Stars, but superweapons quickly became a staple of the Expanded Universe fiction, to the point that one book had Han Solo make fun of the Empire's tendency towards building superweapons, proposing such ridiculous names as "Galaxy Destructor" and "Nostril of Palpatine".

Redemption and making allies of old enemies is also a common plot point in ''Star Wars''. Anakin Skywalker fell to the Dark Side and became Darth Vader, but eventually returned to the Light Side to protect his son, and Han Solo was initially a morally ambiguous character who was eventually convinced to join the Rebellion.

{{w|Rey (Star Wars)|Rey}}, one of the main characters in the sequel trilogy series is an orphan, who was left behind on the planet Jakku as a child. As Rey is Force-sensitive and adept at using a lightsaber, there is much speculation among Star Wars fans as to the identity of her parents. In ''{{w|Star Wars: The Last Jedi}}'', villain Kylo Ren tells her that she is the child of "filthy junk traders", but many fans speculate that he was lying to her.

This is the second false fact generating comic, after [[1930: Calendar Facts]].

==Table==
{| class="wikitable"
! Entry
! Explanation
|-
! colspan="2" | New villain
|-
| Kyle Ren
|Kyle Ren is one letter away from {{w|Kylo Ren|''Kylo'' Ren}}, the adopted "Sith name" of Ben Solo, son of Han and Leia Solo. Kylo is one of the antagonists of the first two movies in the sequel trilogy, and presumably will be so in the third, but there's nobody in the films named "Kyle". (There are a handful of ''Legends'' characters named Kyle, most famously Kyle Katarn, protagonist of the ''Star Wars: Jedi Knight'' video game series.)
|-
| {{w|Malloc}}
| Malloc is a function used in the C programming language to allocate more memory in the running of a program. Malloc may sound similar to {{w|Darth Maul|Maul}}, one of the villains in ''{{w|Star Wars: The Phantom Menace}}'' and in other Star Wars series.
|-
|Darth Sebelius
| {{w|Sebelius}} is the last name of several US people. {{w|Kathleen Sebelius}} is a former state representative and governor of Kansas who was Secretary of the Department of Health and Human Services under President Obama. Randall may have chosen this surname as it sounds similar to {{w|Darth Sidious}}, the overarching villain in the first 6 Star Wars films, who is rumored to return in the upcoming film.
|-
|{{w|Theranos}}
|Theranos was a medical technology company founded by {{w|Elizabeth Holmes}} which claimed to have developed revolutionary blood tests that could produce more data from limited volumes of blood than ever before. They were eventually found to have engaged in fraudulent activity, having tricked investors into thinking their technology was performing better than it actually was or ever could, which resulted in fines for Holmes and Theranos president {{w|Ramesh Balwani}} and the bankruptcy of Theranos. Theranos also sounds similar to {{w|Thanos}}, the main villain of the Infinity Saga in the Marvel Cinematic Universe.
|-
|Lord Juul
|{{w|Juul}} is a brand of e-cigarettes. In addition to the broader controversy surrounding electronic cigarettes, Juul has been investigated for its sale of flavored additives for their cigarettes, which are alleged to be particularly attractive to minors.
|-
! colspan="2" | New friend
|-
| Kim Spacemeasurer
| May be a parody of the name {{w|Luke Skywalker}}, one of the main characters in the original trilogy of films. Other "Nounverber" names in ''Star Wars'' include Starkiller, Luke's original last name which was later applied to Starkiller Base in ''The Force Awakens'', and Biggs Darklighter, Luke's childhood friend and fellow Rebel pilot who died in the attack on the original Death Star.
|-
|Teen Yoda
|{{w|The Child (Star Wars character)|The Child}}, commonly called "Baby Yoda" by fans and the media, is a breakout character from the Disney+ series ''{{w|The Mandalorian}}''. Randall envisions a "teenage" version of this character teaming up with the main characters.
|-
|Dab Tweetdeck
| A {{w|Dab (dance)|dab}} is a dance move which is many decades old but was made popular by that name in the late 2010's. {{w|TweetDeck}} is an application for managing Twitter accounts. Taken together, "Dab Tweetdeck" could be a character name proposed by clueless Disney executives to attract "the kids" to see ''The Rise of Skywalker'', although one would think that this name would be heavily promoted and thus not a spoiler in that case.
|-
| Yaz Progestin
| Yaz sounds like the first name of {{w|Maz Kanata}}, a supporting protagonist in the sequel trilogy. {{w|Progestin}} is a type of medication which imitates the effects of {{w|progesterone}}, a female sex hormone. They are used for various purposes, including birth control, fertility, and appetite stimulation.
|-
| TI-83
| Droids in the Star Wars universe typically have names with letters and numbers, such as R2D2, C-3PO, BB-8, etc. Randall has created a new character called "TI-83". In real life, the {{w|TI-83}} is a common model of graphing calculator manufactured by Texas Instruments. This mirrors the origin of the name "R2-D2", which was inspired when Lucas was working on ''{{w|American Graffiti}}'' and was asked for Reel 2, Dialog Track 2, which was abbreviated "R-2-D-2". He remarked that it would be a "great name" and included it in his then-in-development script for ''Star Wars''.
|-
! colspan="2" | lightsaber colors
|-
| [beige/ochre/mauve/aquamarine/taupe]
| These are different types of colors, none of which is a "traditional" color for a lightsaber. {{w|Beige}} is a pale-grayish yellow. {{w|Ochre}} is a clay earth pigment ranging from yellow to deep orange or brown. {{w|Mauve}} is a pale purple color. A purple color has been used for a lightsaber in the prequel trilogy series, by Jedi Master {{w|Mace Windu}}. {{w|Aquamarine (color)|Aquamarine}} is a blueish green color. {{w|Taupe}} is a dark brown color between brown and gray.
|-
! colspan="2" | superweapon names
|-
|Sun Obliterator
| There was an Expanded Universe superweapon called the "Sun Crusher", which would infiltrate a star system and shoot a special torpedo into the star to make it go supernova.
|-
|Moonsquisher
| There were no ''Star Wars'' superweapons with the word "Moon" in their title (or "squisher"), but in the no-longer-canon ''New Jedi Order'' series, Chewbacca was squished ''by'' a moon that was intentionally de-orbited by invading Yuuzhan Vong.
|-
|World Eater
| Possibly a reference to {{w|Alduin}}, the main villain of the popular game {{w|The Elder Scrolls V: Skyrim}}. In the Expanded Universe, the Empire used World Devastators, massive machines that would strip-mine planets with tractor beams and make weapons and spacecraft from the extracted resources.
|-
|Planet Zester
| A {{w|zester}} is a cooking tool for zesting citrus fruit, that is, scraping off the outer layer of a citrus fruit to obtain the flavorful outer layer of its skin. Zesting a planet would be devastating to anything built or living on its surface.
|-
|Superconducting supercollider
| A {{w|supercollider}}, or particle accelerator, is a machine used to accelerate charged particles to very high speeds, for testing in particle physics. The {{w|Superconducting Super Collider}} was a proposed accelerator which was to be constructed in Texas, but was cancelled partway through construction.
|-
! colspan="2" | station capabilities
|-
|blowing up a planet with a bunch of beams of energy that combine into one
|This is how the {{w|Death Star}} was depicted in ''{{w|Star Wars: A New Hope}}''. Many beams converged together to form one energy beam. The superweapon was used to destroy the planet Alderaan, as an intimidation tactic against Princess Leia.
|-
|blowing up a bunch of planets with one beam of energy that splits into many
|This is how the superweapon on Starkiller Base was depicted in ''{{w|Star Wars: The Force Awakens}}''. A single energy beam split into several beams, allowing it to attack many planets. The superweapon was used to destroy the planets in the Hosnian system, the headquarters of the New Republic.
|-
|cutting a planet in half and smashing the halves together like two cymbals
|Jango Fett's "seismic charge" weapon, which he used in a dogfight against Obi-Wan Kenobi in ''Attack of the Clones'', produced a plane wave that cut asteroids in half; presumably a larger weapon of this kind could do the same to a planet.
|-
|increasing the CO<sub>2</sub> levels in a planet's atmosphere, causing rapid heating
|This seems to have occurred on the planet {{w|Venus}}. Venus is 97% carbon dioxide, and is also the hottest planet in the Solar System, due to a greenhouse effect, preventing the planet from cooling.
|-
|triggering the end credits before the movie is done
|The {{w|closing credits}} or end credits of a film is the list of cast and crew who were involved in the making of the film. It would be quite strange to show the end credits of the film before it has concluded. This entry is considerably less damaging to a planet{{Citation needed}} than the other 4 entries in this section, but if early audiences are left unsatisfied by the movie, they might tell everyone else not to see it, which would put the ''Star Wars'' franchise in a perilous financial situation. This would negatively impact the villains as well as the heroes, but they might consider this a worthwhile trade if it is their best option at harming the heroes.
|-
! colspan="2" | Old enemy/new friend
|-
|Boba Fett
| Boba Fett is a famous bounty hunter introduced in the ''Star Wars Holiday Special'' and made popular by ''The Empire Strikes Back''. On the Empire's orders, he helped capture Han Solo as part of a plot to capture Luke Skywalker, and tried to prevent Luke from rescuing Han, but was defeated and knocked into a sarlacc pit, where he was presumed eaten. In the Expanded Universe, he survived and did eventually join the protagonists against extragalactic invaders; his survival has not been confirmed by Disney's new canon, but he would be a plausible character to bring back in ''The Rise of Skywalker''.
|-
|Salacious Crumb
| Salacious B. Crumb is a Kowakian monkey-lizard who was Jabba the Hutt's jester. He wasn't exactly a major adversary, but he did pull one of C-3PO's eyes out. He was last seen on Jabba the Hutt's sail barge, which was made to explode after Han, Luke, and the rest of the heroes escaped from it, and is presumed dead.
|-
|The Space Slug
| In ''The Empire Strikes Back'', Han Solo pilots the Millennium Falcon into a giant cave to evade pursuit and get time to effect repairs. He is interrupted when the cave turns out to be the mouth of a giant space slug, which the Falcon barely escapes. A giant space slug might be a powerful ally in a battle against a giant space station.
|-
|The bottom half of Darth Maul
| Darth Maul was cut in half by Obi-Wan Kenobi at the end of ''The Phantom Menace''. His upper half, plus mechanical legs, has returned as a villain in the ''Clone Wars'' TV series and ''Solo''. Given that Maul was a Sith and Kenobi a Jedi, who trained Luke, who trained Rey, it would be extremely unexpected for his bottom half to join forces with the heroes, although presumably his bottom half would have to be attached to something, which might be better disposed towards Jedi.
|-
|YouTube Commenters
| The sequel trilogy has received more mixed reviews from watchers than Disney might like, and many vocal non-fans have taken to commenting on YouTube (via videos and comments) on what they don't like about the new movies and new characters. If ''The Rise of Skywalker'' fully wins the crowd, an alliance between the heroes and their former critics would be extremely powerful.
|-
|}

==Transcript==
{{incomplete transcript}}
:<big>Star Wars Spoiler Generator</big>

:[Shown below is a branching flowchart of sorts that begins at the phrase "In this Star Wars movie, our heroes return to take on the First Order and new villain...", then flows through various paths to build up a story.]

:In this Star Wars movie, our heroes return to take on the First Order and new villain...
::Kyle Ren
::Malloc
::Darth Sebelius
::Theranos
::Lord Juul

:...with help from their new friend...
::Kim Spacemeasurer
::Teen Yoda
::Dab Tweetdeck
::Yaz Progestin
::TI-83

:Rey builds a new lightsaber with a...
::beige
::ochre
::mauve
::aquamarine
::taupe

:...blade, and they head out to confront the First Order's new superweapon, the...
::Sun Obliterator
::Moonsquisher
::World Eater
::Planet Zester
::Superconducting Supercollider

:...a space station capable of...
::blowing up a planet with a bunch of beams of energy that combine into one
::blowing up a bunch of planets with one beam of energy that splits into many
::cutting a planet in half and smashing the halves together like two cymbals
::increasing the CO<sub>2</sub> levels in a planet's atmosphere, causing rapid heating
::triggering the end credits before the movie is done

:They unexpectedly join forces with their old enemy...
::Boba Fett
::Salacious Crumb
::The Space Slug
::the bottom half of Darth Maul
::Youtube commenters

:...and destroy the superweapon in a battle featuring
::a bow that shoots little lightsaber-headed arrows
::X-Wings and TIE fighters dodging the giant letters of the opening crawl
::a Sith educational display that uses Force Lightning to demonstrate the dielectric breakdown of air
::Kylo Ren putting on another helmet over his smaller one
::a Sith car wash where the bristles on the brushes are little lightsabers

:P.S. Rey's parents are...
::Luke
::Leia
::Han
::Obi-Wan
::a random junk trader

:...and...
::Poe
::BB-8
::Amilyn Holdo
::Laura Dern
::a random junk trader
::that one droid from the Jawa Sandcrawler that says ''Gonk''

{{comic discussion}}

[[Category:Charts]]
[[Category:Star Wars]]
[[Category:Comics featuring real people]] 
[[Category:Programming]]

2087: Rocket Launch

2018-12-19T23:21:48Z

Mjackson: /* Explanation */ Max-CB reference?

{{comic
| number = 2087
| date = December 19, 2018
| title = Rocket Launch
| image = rocket_launch.png
| titletext = NASA tries to coordinate launch timing with the Care Bears' cloud castle, but unfortunately sometimes collisions with stray Care Bears are unavoidable, so they just try to make the fairings sturdy and hope for a glancing impact.
}}

==Explanation==
{{incomplete|Created by a CARE BEAR STARE. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}

This comic was posted on a week with a notably high number of {{w|rocket launch}}es. Originally, there were to be four {{w|Orbital spaceflight|orbital rocket}} launches from the United States on December 19, 2018 (the publish date for the comic), which would have tied with the prior record for number of orbital rocket launches in one day. While these launches were ultimately delayed, breaking the event, the comic was doubtless under production by then.

Only some of the steps listed are actually typical.

* Liftoff: the traditional start of a launch, when the rocket leaves the ground. The engines will typically have been ignited a short time before, but need to throttle up to produce enough thrust to overcome the rocket's weight. "Liftoff" refers to the moment this happens, making the rocket lift off the ground.
* {{w|Max q|Max-Q}}: Peak aerodynamic stress. A rocket accelerates from the moment it leaves the ground. The faster a rocket goes, the more air it pushes through per second - but the higher a rocket goes, the less air there is to push through. (Before liftoff, the rocket is not moving, and thus is not pushing through air. Once in orbit, there is essentially no air to push through, so the rocket is not pushing through air. Between those two times, the rocket is pushing through some amount of air, the exact amount increasing before Max Q and decreasing after Max Q.) "Max Q" is the moment where these two factors produce a maximum, and is the point where the rocket's structure must withstand the most air pushing back against it.
* Booster separation: rockets are designed in {{w|Multistage rocket|stages}}, so they do not have to carry the empty fuel tanks all the way to orbit. (Carrying any mass to orbit is expensive, so the more that can be dropped off earlier, the better.) 3 stages is typical. "Booster separation" marks the point where the first of these stages (the "{{w|Booster (rocketry)|booster}}"), its fuel expended, is typically ejected.
* Max-CB: Highest chance of collision with {{w|Care Bears}}. This is entirely fictitious. Care Bears are fictitious characters, which have a toy line, television series, and movies. The existence of a basketball sneaker named the "Nike Air Force Max CB" may or may not be relevant.
* Main stage separation: see "booster separation" above. This marks the point where the second stage (the "main stage") is ejected.
* {{w|GPS}} silenced so it will stop saying "Make a U-turn". Again, this is fictional. While some rockets do make use of signals from the Global Positioning System ("GPS"), no rockets are known to use the navigational devices that incorporate GPS readers and street maps, providing directions - often with optional text-to-speech - along the Earth's surface. Some such devices are notorious for getting confused in extreme situations (such as the high Mach numbers that rockets achieve); constantly uttering "make a U-turn" would be one such confusion, and any device in such a confused state might well be silenced for being more annoying than helpful. Navigation of this nature is neither necessary nor useful on a rocket, which will have its entire route from ground to orbit computed before launch, and piloting typically left entirely to computers given the precise timing required.
* Reunification (of boosters): another fictional step. Discarded stages fall back into the Earth's atmosphere, either hitting the ground (or, more often, water) or burning up from the friction of falling at extreme speed. The booster and main stage would not be on a course to come anywhere near each other, and would not have enough fuel to change their course (running out of fuel being why they were discarded in the first place). Even if they did, landing for reuse (as {{w|SpaceX reusable launch system development program|SpaceX has attempted}}, sometimes successfully) would be far more likely than a mid-air reunion.
* Pilot panics, copilot takes command after struggle: another fictional step. Astronauts are not the sort of people who panic easily, nor struggle with their crewmates. More importantly, in any modern rocket the "pilot" is not a human being, but a computer incapable of panic (as in the human emotion). It is possible that part of the flight computer could fail, causing redundant failsafes to take over, but the process could not correctly be described as a "struggle", and in any case this sort of failure is uncommon enough that it is not part of a "typical" rocket launch.
* Pursuit phase: fictional. This assumes the (nonexistent) reunified booster would have enough fuel to pursue the top stage of the rocket, and a reason to do so. See "Reunification".
* Inter-stage {{w|dogfight}}: fictional. See "Pursuit phase". This at least provides a potential motive. A dogfight is an aerial battle between fighter aircraft, conducted at close range. This step claims that the rocket booster and the top stage of the rocket engage in a battle.
* Winner proceeds to space: fictional. As noted above, in a real rocket launch there is no dogfight for there to be a "winner" of. A kind reading would note that the top stage "wins" by default, and it is certainly the case that in a real (orbital) rocket launch, the top stage typically does proceed to space.

The title text refers once again to the Care Bears franchise. The Care Bears live in a castle made of clouds, so the comic claims that NASA aims to avoid launching into their castle, but sometimes cannot avoid hitting "stray" Care Bears.

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

{{comic discussion}}

Talk:1862: Particle Properties

2017-07-12T15:19:16Z

Mjackson:

oh dear, they copied the alt text wrong
[[Special:Contributions/173.245.50.108|173.245.50.108]] 14:58, 12 July 2017 (UTC)

More significantly, color charge is carried by gluons as well as quarks. [[User:Mjackson|Mjackson]] ([[User talk:Mjackson|talk]]) 15:19, 12 July 2017 (UTC)