Talk:2780: Physical Quantities

Explain xkcd: It's 'cause you're dumb.
Jump to: navigation, search

Planck Length here actually refers to the length of Planck himself. The same may apply to other names. 2659: Unreliable Connection (talk) 03:02, 25 May 2023 (UTC)

And here I was thinking it meant the length of Planck planking. Thisfox (talk) 22:00, 25 May 2023 (UTC)

I wonder if this is alluding to the Smoot, a unit of measure devised by MIT students to represent the height of Oliver R. Smoot. Probably worth a mention in the description nonetheless. Trimeta (talk) 03:45, 25 May 2023 (UTC)

Hawking radiation: ~100 W (through heat)

I'm pretty sure he loses most of his heat through conduction and convection. Radiation should be much smaller. DanielLC (talk) 06:24, 23 March 2024 (UTC)

Planking is a thing. One pretends that one is a board, or plank. Are some funny pics. The opposite of planking would be good god how? How can even a cat!?!! [Special:Contributions/|]] 06:26, 25 May 2023 (UTC)

Hubble length is 13.2 m. 10:30, 25 May 2023 (UTC)

The m³ unit for Broca's area is surely a typo, right? 14:55, 25 May 2023 (UTC)

That would be my guess. I sent a note to Randall to ask. BunsenH (talk) 21:24, 25 May 2023 (UTC)
The comic has been corrected to m2 now. ~underhat

Just a couple of others: 1 Watt is what it takes to invent the condensing steam engine and Euler's number doesn't exist, because he died before telephones were invented. 15:08, 25 May 2023 (UTC)

There are lots of <someone>'s Number constants. We could have an entire phonebook of these. Barmar (talk) 17:53, 25 May 2023 (UTC)
I tried phoning Graham's Number, once. I'm still not yet finished dialling! 19:22, 25 May 2023 (UTC)
I thought you meant Alexander Graham Bell's number. 23:04, 25 May 2023 (UTC)
Shouldn't AG Bell's number be 1? Barmar (talk) 16:03, 27 May 2023 (UTC)
Or 2. (Thomas Watson being on 1.) 18:14, 27 May 2023 (UTC)
Chandresekhar's Limit = 3 pints? Barmar (talk) 17:53, 25 May 2023 (UTC)
Don't forget that numbers are now Euler letters! 20:41, 25 May 2023 (UTC)

From a friend, regarding Fermi's current temperature: The typical ground temperature of a burial plot in Chicago depends on the depth and the season. According to the Illinois State Climatologist Office, the average soil temperature at 4 inches depth ranges from about 25°F in January to about 75°F in July. The average soil temperature at 8 inches depth ranges from about 30°F in January to about 77°F in July. These measurements are made under grass, so the soil temperature under other ground covers or under bare ground may vary somewhat from those shown here. In the winter, when the ground is frozen, cemeteries are able to continue burying the dead by using special equipment such as frost rippers or steamers to break through the frozen layer of soil. They also use heaters or blankets to keep the graves open until the burial service is completed. RandalSchwartz (talk) 23:09, 25 May 2023 (UTC)

Assuming his grave is 6 feet deep and his body is at 5 feet deep, he's going to be below the frost line, which is 40" in Chicago, so the temperature is never going to drop below 32°F. Based on the charts at, he should see temperatures ranging from 40° to 62°. Interestingly enough, at that depth, the soil temperature will lag behind the surface temperature enough that the coldest temperatures will be in March and the warmest will be in September. 03:36, 26 May 2023 (UTC)

Pretty sure the Schwarzschild radius is the radius of a curled up child, not of Mr. Schwarzschild. 08:49, 26 May 2023 (UTC)

68cm diameter of a person curled up seems about right. 15:23, 26 May 2023 (UTC)

Besides Smoot, there's Erdős number.

The Erdős number (Hungarian: [ˈɛrdøːʃ]) describes the "collaborative distance" between mathematician Paul Erdős and another person, as measured by authorship of mathematical papers.
The Erdős number or Paul Erdős is 0. Anyone who collaborated with him has Erdős number 1, and anyone who collaborated with someone with Erdős number 1 (but not Paul Erdős himself) has Erdős number 2 - and so on. Taking this comic's interpretation, the Erdős number should be either 1, 'cause there was only one Paul Erdős, or 0, because he's dead. 15:23, 26 May 2023 (UTC)
What is the Erdős number of Kevin Bacon? 15:21, 30 May 2023 (UTC)
I believe infinite, as he has published no relevant papers. (talk) 16:17, 26 October 2023 (please sign your comments with ~~~~)
That'd be 'undefined', then. 23:52, 27 October 2023 (UTC)
There's also the Helen: a unit of beauty named after Helen of Troy [1]
I believe Système international d'unités wishes, in a reversal from the kilogram, treat the millihelen (mH) as the fundemental base unit. But they are having trouble finding a better definition prototype than the original platinum-iridium ship. 08:51, 31 May 2023 (UTC)

Actually, anyone using Celsius degrees on daily basis, would write 36.6 degrees as human body temperature. 37 is slightly elevated. So 37 looks like "American converted known value from Farenheit scale" -- (talk) 12:18, 29 May 2023 (please sign your comments with ~~~~)

Well, 33.2–38.2°C (or 91.8–100.8°F, if you prefer, give or take the rounding in both) can actually be normal, given acceptible changes in conditions (environmental) and condition (physiological). And of course it depends on which way you measure the core/surface temperature, even for the same person at the same instant. But it's the oft-quoted value. And just because it normally drifts doesn't mean that it hasn't abnormally drifted, so can still be taken as a cue to check why it's a degree or three off the 'standard'.
I suspect you could be more exacting with an uncomplaining long-dead corpse, but perhaps you don't need quite so much analysis when you already know that it's a long-dead corpse you're dealing with, once you've gotten past the need to assess the rate of insect pupation/etc. ;) 13:08, 29 May 2023 (UTC)