<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en">
		<id>https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&amp;feedformat=atom&amp;user=Professor+Frink</id>
		<title>explain xkcd - User contributions [en]</title>
		<link rel="self" type="application/atom+xml" href="https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&amp;feedformat=atom&amp;user=Professor+Frink"/>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php/Special:Contributions/Professor_Frink"/>
		<updated>2026-04-16T00:19:47Z</updated>
		<subtitle>User contributions</subtitle>
		<generator>MediaWiki 1.30.0</generator>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2520:_Symbols&amp;diff=218497</id>
		<title>Talk:2520: Symbols</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:2520:_Symbols&amp;diff=218497"/>
				<updated>2021-09-25T15:58:06Z</updated>
		
		<summary type="html">&lt;p&gt;Professor Frink: micrometer&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;lt;!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Great work by whomever did this, but is it possible R_e is something else?  I agree that the numerical aspect makes it seem like a fluid mechanics problem, but I've never seen the Reynolds number with a subscripted e... only a regular size e, such that it is Re, not R_e. [[Special:Contributions/108.162.237.93|108.162.237.93]] 20:36, 24 September 2021 (UTC)&lt;br /&gt;
: R sub e (not Re) is Effective Reproduction Number. This is related to infection rates. I'm pretty sure it's R sub e, not Re given that infection rates are very much on his mind right now.&lt;br /&gt;
:: It would be out of place relative to all the other entries, though, which are all physics related. IMO it's more likely this was an error.&lt;br /&gt;
: Earth's radius is abbreviated &amp;quot;R sub e&amp;quot; [[Special:Contributions/162.158.107.4|162.158.107.4]] 21:30, 24 September 2021 (UTC)&lt;br /&gt;
: Could be the remainder of a series (i.e. the error when using the first terms of the series as an approximation). Determining upper bounds on this error is usually very tedious.&lt;br /&gt;
: R sub e is tire effective rolling radius (or effective radius)--a radius based on the distance traveled by one rotation of a pneumatic tire.  Re is similar to the unloaded radius (for radial tires) and normally larger than the loaded radius (distance from axle to ground).&lt;br /&gt;
&lt;br /&gt;
T to the fourth power looks like blackbody radiation, any ideas what specifically that formula represents? [[Special:Contributions/162.158.203.22|162.158.203.22]] 20:40, 24 September 2021 (UTC)&lt;br /&gt;
:There's an equation for what reflects off a spherical object that is a quartic equation (although I'd expect concave reflectors, not convex ones, to risk skin-burn. Or, more likely something to do with UV (non-)absorbtion or generation, but I imagine someone knows ''exactly'' what it is, without someone like me just guessing wildly. ;) [[Special:Contributions/141.101.99.82|141.101.99.82]] 21:05, 24 September 2021 (UTC)&lt;br /&gt;
This wiki does not seem to have a consistent formatting structure for lists&lt;br /&gt;
&lt;br /&gt;
The ''N&amp;lt;sub&amp;gt;A&amp;lt;/sub&amp;gt;'' could also soon become NAN (not a number) thus being only a step away from the dangerous arthmeric error. --[[Special:Contributions/162.158.88.43|162.158.88.43]] 21:38, 24 September 2021 (UTC)&lt;br /&gt;
&lt;br /&gt;
'''Bold Title'''&lt;br /&gt;
:Content starting with a tab&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
*'''Bold title''' content continues on same line&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
*Regular title&lt;br /&gt;
Content on a new line, but not starting with a tab&lt;br /&gt;
&lt;br /&gt;
As well as tables and mixes of these formats. Maybe someone should pick one and apply it to all the explanations. I just noticed it because of the inconsistencies as people are quickly throwing something together for this new comic. [[Special:Contributions/162.158.107.4|162.158.107.4]] 21:02, 24 September 2021 (UTC)&lt;br /&gt;
&lt;br /&gt;
I read the penultimate line as &amp;quot;Mg&amp;quot; and was trying to imagine a meaning for &amp;quot;megagrams per kilogram&amp;quot;. Sloppy Greek letter there, Randall. [[User:Nitpicking|Nitpicking]] ([[User talk:Nitpicking|talk]]) 03:17, 25 September 2021 (UTC)&lt;br /&gt;
&lt;br /&gt;
Why are partial derivatives considered graduate-level? They're typically covered in first level undergraduate science courses, along with gradients and such. [[User:FPSCanarussia|FPSCanarussia]] ([[User talk:FPSCanarussia|talk]]) 03:34, 25 September 2021 (UTC)&lt;br /&gt;
&lt;br /&gt;
The reference to &amp;quot;micrometer&amp;quot; links to the Wikipedia page for the measuring device, but it should link to the page for the unit of length: https://en.wikipedia.org/wiki/Micrometre [[User:Professor Frink|Professor Frink]] ([[User talk:Professor Frink|talk]]) 15:58, 25 September 2021 (UTC)&lt;/div&gt;</summary>
		<author><name>Professor Frink</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2192:_Review&amp;diff=178420</id>
		<title>2192: Review</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2192:_Review&amp;diff=178420"/>
				<updated>2019-08-22T15:09:50Z</updated>
		
		<summary type="html">&lt;p&gt;Professor Frink: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2192&lt;br /&gt;
| date      = August 21, 2019&lt;br /&gt;
| title     = Review&lt;br /&gt;
| image     = review.png&lt;br /&gt;
| titletext = Controls are a little hard to figure out.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a REVIEWER. Examples of video games with huge worlds and nice graphics, and possible also mention some with hard to learn controls vs easy to learn. Do NOT delete this tag too soon.}}&lt;br /&gt;
This comic is a five of five star review of planet {{w|Earth}}, by [[Randall]], depicted as [[Cueball]] in his profile picture. The review is written as a video game review, praising the size and realism of the world. The comic's humor draws from the fact that Earth is a completely real object and shouldn't be rated on the same lines as a video game, and the fact that there's no place that the Earth can be reviewed (with the possible exception of ''The Hitchhiker's Guide to the Galaxy'').&lt;br /&gt;
&lt;br /&gt;
The title text states that the 'controls are hard to figure out', possible alluding to the fact that it takes a lot of time to learn how to walk and talk, a rather basic thing in most video games, but more likely to the fact that it is hard to navigate around in one's life, as has been the subject of many comics.&lt;br /&gt;
&lt;br /&gt;
Earth (or humans and other life forms on Earth) has many problems at the moment, such as [[:Category:Climate change|climate change]], {{w|overpopulation}}, {{w|gun violence}}, {{w|sexual violence}}, {{w|censorship}}, {{w|poverty}}, and increasing {{w|Depression (mood)|depression}}, to name just a few. &lt;br /&gt;
&lt;br /&gt;
However, this comic also serves as a reminder that, overall, the world is a five-star world. It reminds us to look around: there's so much world to explore! And also that it is worth preserving for future generation to play around on. It is not a game that grows outdated and will be replaced by a new and better version next year...&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[A profile picture of Cueball in a small frame is next to five solid yellow stars. Below this is a review:]&lt;br /&gt;
:&amp;lt;span style=&amp;quot;color:orange;&amp;quot;&amp;gt;★★★★★&amp;lt;/span&amp;gt;&lt;br /&gt;
:Great graphics, huge world&lt;br /&gt;
&lt;br /&gt;
:[Caption below the comic:] &lt;br /&gt;
:My overall review of Earth&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Online reviews]]&lt;/div&gt;</summary>
		<author><name>Professor Frink</name></author>	</entry>

	</feed>