Search found 202 matches

by Heimhenge
Tue Jul 10, 2018 3:47 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2017: "Stargazing 2"
Replies: 5
Views: 865

Re: 2017: "Stargazing 2"

If you use 5000 for the number of naked-eye stars, and the triangle formula given here: https://math.stackexchange.com/questions/206762/how-many-triangles-can-be-formed-from-n-points-on-a-circle They say: n = N(N-1)(N-2) / 6 then the number of visible triangles is like 20,820,835,000. But that's the...
by Heimhenge
Mon Jul 09, 2018 1:30 am UTC
Forum: Science
Topic: Cooling gas by expansion
Replies: 17
Views: 1170

Re: Cooling gas by expansion

Moving relative to what? A single particle "gas cloud" would have all particles stationary relative to the cloud. An interesting point. So what you're saying is that E K is only meaningful if speed is measured with respect to the COM of a gas cloud within which some collisions might still...
by Heimhenge
Sun Jul 08, 2018 11:26 pm UTC
Forum: Science
Topic: Cooling gas by expansion
Replies: 17
Views: 1170

Re: Cooling gas by expansion

If the absolute temperature of a gas is proportional to the average particle kinetic energy, then how can a moving particle (regardless of whether it will ever collide again or not) represent zero kelvin? I don't get why the mean free path is such a big deal.
by Heimhenge
Sun Jul 08, 2018 7:35 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2013: "Rock"
Replies: 42
Views: 2384

Re: 2013: "Rock"

And everyone knows that a solipse has only a single focus.
by Heimhenge
Sat Jun 30, 2018 2:59 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2013: "Rock"
Replies: 42
Views: 2384

Re: 2013: "Rock"

I can't even quite work out if this describes how I skim stones. I mean, I just do it, and it works. (And a mere five splashes is a failure on barely-rippled water, as depicted, though sea-shore/large-lake-shore skimming often has the added issue of waves to contend with, except on the stillest of ...
by Heimhenge
Tue Jun 26, 2018 12:38 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2011: "Newton's Trajectories"
Replies: 13
Views: 1206

Re: 2011: "Newton's Trajectories"

Well here's the original from Principia: https://i.imgur.com/dzSLWaa.png?1 It's a horizontal cannon on a (to scale 1000 mile altitude and well above the atmosphere) mountaintop, so yeah, with the right projectile speed it's shooting itself. And yes, Newton must have been "assuming away friction...
by Heimhenge
Fri Jun 22, 2018 11:16 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2010: "Update Notes"
Replies: 13
Views: 1488

Re: 2010: "Update Notes"

Geez, what about all the people who have both those apps? Gonna make them feel left out of the conversation ... or like they're eavesdropping.
by Heimhenge
Sat Jun 16, 2018 2:52 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2007: "Brookhaven RHIC"
Replies: 32
Views: 2134

Re: 2007: "Brookhaven RHIC"

Sableagle wrote:
freezeblade wrote:There can be worse, look at this! https://goo.gl/maps/L5UGmQyNycy

I'm sure the fish shall find it interesting.


Wow! Just 30 m of sea level rise and Arizona gets an oceanfront beach.
by Heimhenge
Thu Jun 14, 2018 4:04 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2006: "Customer Rewards"
Replies: 39
Views: 2210

Re: 2006: "Customer Attention"

The funny thing is that this is better than the "fashion" community where you're expected to give them free advertising for nothing. Every time I'm at the beach and I see someone with a Nike "swoosh" on their swim trunks, I think "how would you react if I asked you to pay m...
by Heimhenge
Wed May 23, 2018 8:37 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1997: "Business Update"
Replies: 21
Views: 2480

Re: 1997: Business Update

It would have been funnier (or grosser) if the toilet had been producing original content.
by Heimhenge
Wed May 16, 2018 3:09 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1994: "Repairs"
Replies: 29
Views: 4097

Re: 1994: "Repairs"

Man, this comic so describes me right now. Trying to fix an old Fidelity Chess Challenger (talking board computer) to get it up on eBay. I'm about at hour 2 on Randall's chart, 'cept it took me close to 8 hours to get there. And there are no YouTube videos on this old machine. Parts have been scatte...
by Heimhenge
Fri May 11, 2018 8:31 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1992: "SafetySat"
Replies: 28
Views: 3991

Re: 1992: "SafetySat"

Firsts thought was that wet sand is great for extinguishing a variety of chemical fires, but why would that be a safety hazard? Second thought: loose fluids and fine-grained particulates get into fucking everything when floating around in zero G. I tend to agree with your second thought. The part t...
by Heimhenge
Tue May 08, 2018 3:29 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1990: "Driving Cars"
Replies: 86
Views: 6251

Re: 1990: "Driving Cars"

Got my license in Wisconsin. We took a drivers ed course in high school ... I think sophomore year. Included this cool "box" you sat in for a car simulation with a rudimentary dashboard. Not a real simulator though. It was just for measuring reaction speed. When the red light on the dash c...
by Heimhenge
Wed Apr 25, 2018 6:15 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1985: "Meteorologist"
Replies: 54
Views: 6639

Re: 1985: "Meteorologist"

jabrown371 wrote:This is amazing. My brother:
- Has an applied mathematics degree
- Is getting his Masters in Linguistics
- Spent 1 year in between doing software development
My brother could be all three people at once!


Geez, I hope he never takes a job as a meteorologist. :)
by Heimhenge
Wed Apr 25, 2018 4:50 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1985: "Meteorologist"
Replies: 54
Views: 6639

Re: 1985: "Meteorologist"

This one is funny. Reminded me of when I learned the difference between "partly sunny" and "mostly cloudy" (not synonyms as I thought). The new NWS website actually has a glossary to help with translating this jargon: http://w1.weather.gov/glossary/ Spoiler: They do not define &q...
by Heimhenge
Mon Apr 09, 2018 10:16 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1978: "Congressional Testimony"
Replies: 21
Views: 3615

Re: 1978: "Congressional Testimony"

In order to maintain the No-Cameron reality, the No-Cameron future Skynet sends back a terminator to force the No-Cameron reality. It can't not do it, as it always had already will-have-done-it and created the chronology in which it was always going to do so in order to have-done-it-already. I thin...
by Heimhenge
Wed Mar 28, 2018 8:29 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1973: "Star Lore"
Replies: 33
Views: 4690

Re: 1973: "Star Lore"

With that many status LEDs, there's bound to be one device with an unreasonably bright one lighting up the entire room, thus torpedoing any attempt ato sleep. You must be talking about the light on my Panamax power conditioner. People who stayed over and slept on the couch complained how bright it ...
by Heimhenge
Wed Mar 21, 2018 5:55 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1970: "Name Dominoes"
Replies: 30
Views: 4875

Re: 1970: "Name Dominoes"

Matching Garnet with Ruby and Safire seems a bit of a stretch. Under those rules Chevy Chase would be a match for Harrison Ford. Judges?
by Heimhenge
Wed Mar 07, 2018 7:18 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1964: "Spatial Orientation"
Replies: 77
Views: 8241

Re: 1964: "Spatial Orientation"

When someone asks me for directions the first thing I assess is whether I should use "turn left" or "turn north" (or whatever direction). Wow, I've never heard anyone say "turn <cardinal direction>" before in my entire life, so it's interesting to me that you would con...
by Heimhenge
Wed Mar 07, 2018 6:12 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1964: "Spatial Orientation"
Replies: 77
Views: 8241

Re: 1964: "Spatial Orientation"

When someone asks me for directions the first thing I assess is whether I should use "turn left" or "turn north" (or whatever direction). Some people handle the former better, and others prefer compass directions. Not sure exactly how I make that assessment ... might have somethi...
by Heimhenge
Wed Feb 28, 2018 11:54 pm UTC
Forum: Serious Business
Topic: More efficient airplane boarding protocols
Replies: 66
Views: 5224

Re: More efficient airplane boarding protocols

I guess it's about time to weigh in again as OP. I was not expecting this amount of discussion from a thread started the night after a bad boarding experience. Seems like this is a common gripe. I was mainly venting, but also really wondering why the system can't be improved. After reading all the f...
by Heimhenge
Tue Feb 27, 2018 12:58 am UTC
Forum: Serious Business
Topic: More efficient airplane boarding protocols
Replies: 66
Views: 5224

More efficient airplane boarding protocols

Just got back on a flight from Chicago O'Hare to Phoenix Sky Harbor. They told us ahead of time the flight was totally booked with no vacant seats. I tried to mentally adjust for what I knew was going to be a less-than-pleasant flight. FYI, this was American Airlines, but other airlines have the sam...
by Heimhenge
Wed Feb 14, 2018 4:20 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1955: "Robots"
Replies: 25
Views: 3074

Re: 1955: "Robots"

Less worried about malevolent humanoid robots, more worried about malevolent drones:

https://www.youtube.com/watch?v=9CO6M2HsoIA&t=
by Heimhenge
Tue Feb 06, 2018 4:46 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1951: "Super Bowl Watch Party"
Replies: 23
Views: 4533

Re: 1951: "Super Bowl Watch Party"

I'm sure there is a list of hey we'll pay you x if there is time to air this ads. More than likely, there's a waiting list for which, if time permits, the advertiser gets the privilege of paying the full $5M for 30 seconds of air time. Knowing the NFL's propensity for extracting as much cash from t...
by Heimhenge
Tue Feb 06, 2018 12:06 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1951: "Super Bowl Watch Party"
Replies: 23
Views: 4533

Re: 1951: "Super Bowl Watch Party"

OK, the title text seems to imply there was 28 seconds (18 hours / 2300) of dead air somewhere around the middle of the broadcast. I was watching but didn't notice anything like that. Did I miss something during a halftime restroom break? Maybe they blanked out Timberlake? :)
by Heimhenge
Fri Jan 19, 2018 7:47 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1944: "The End of the Rainbow"
Replies: 48
Views: 5478

Re: 1944: "The End of the Rainbow"

Munroe wrote:The retina is the exposed surface of the brain, so if you think about a pot of gold while looking at a rainbow, then there's one at BOTH ends.


Then the taste buds on the tongue must also be the exposed surface of the brain ... think about that next time you're deep kissing someone.
by Heimhenge
Thu Jan 18, 2018 7:41 pm UTC
Forum: Science
Topic: Science Websites
Replies: 70
Views: 200711

Re: Science Websites

I humbly submit my own weekly blog http://www.sky-lights.org. Focus is mainly on earth and space science. And I take questions.
by Heimhenge
Wed Jan 17, 2018 5:19 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1943: "Universal Dreams"
Replies: 39
Views: 3945

Re: 1943: "Universal Dreams"

Have to say I've had all those universal dreams (except BHG's of course). I've also had another that, according to friends and family, is also quite common. You're trying to cross a road and you can see a large truck / steam roller / whatever bearing down on you, but as you try to cross the road mor...
by Heimhenge
Sun Dec 31, 2017 4:51 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1935: "2018"
Replies: 66
Views: 6517

Re: 1935: "2018"

Um, "Except only every 4th '00 is a leap year" is easier to remember. 400,800,1200,1600,2000,2400 are still leap years. So we really dodged a bullet in the year 2000. I might have had to waste time learning about the exception. Except I just did... dammit. Something tells me this still is...
by Heimhenge
Thu Dec 28, 2017 2:51 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1934: "Phone Security"
Replies: 22
Views: 3433

Re: 1934: "Phone Security"

The main caveats I can think of are (A) constructing a homemade EMP might be illegal How do you even create an EMP, other than by detonating a nuclear bomb? Huge capacitor discharged through an inductor. Very directional but effective. Was going to build one to take out large sub-woofers in cars I ...
by Heimhenge
Thu Dec 21, 2017 12:01 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1931: "Virtual Assistant"
Replies: 27
Views: 3741

Re: 1931: "Virtual Assistant"

Damn, I had no idea so many people fucked with their Windows sounds. Windows startup on my W2K box was the short and sweet "working" from Trek TOS. Still using the Trek communicator chirp for incoming calls on my cell. Exhaustive Trek audio library here: http://www.trekcore.com/audio/
by Heimhenge
Thu Dec 14, 2017 8:08 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1928: "Seven Years"
Replies: 52
Views: 11841

Re: 1928: "Seven Years"

Lots of speculation over the years whether Randall reads these threads. Probably too busy most of the time, but damn ... sure hope he reads this one. There is much love here.
by Heimhenge
Wed Dec 13, 2017 8:09 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1928: "Seven Years"
Replies: 52
Views: 11841

Re: 1928 Seven Years

Yeah, inspiring indeed. Thanks for sharing Randall, and you both have a great holiday.
by Heimhenge
Fri Dec 01, 2017 5:25 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1923: "Felsius"
Replies: 78
Views: 7127

Re: 1923: "Felsius"

Why stop with averaging just Celsius and Fahrenheit? Throw Rankine and Kelvin into the mix too. Call it RKCF. I leave the formula as an exercise for the reader.
by Heimhenge
Fri Nov 17, 2017 3:50 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1917: "How to Make Friends"
Replies: 35
Views: 4849

Re: 1917: "How to Make Friends"

Worst advice anyone ever gave anyone, in any context: "Just be yourself". I dunno, it seems like a tautology to me. Who else am I going to be? Someone who feigns interest in a topic to buy some time. Then you can look for "cracks" in the discussion that segue you to a true commo...
by Heimhenge
Mon Oct 30, 2017 5:52 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1909:"Digital Resource Lifespan"
Replies: 61
Views: 6578

Re: 1909:"Digital Resource Lifespan"

And why does Randall think that the PDF format will be eternal? I'm pretty sure he's just saying they currently still work, not that anything listed there will necessarily be eternal. I was interpreting his right-facing arrow to mean "forever into the future" as he implied with books and ...
by Heimhenge
Mon Oct 30, 2017 4:34 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1909:"Digital Resource Lifespan"
Replies: 61
Views: 6578

Re: 1909:"Digital Resource Lifespan"

And why does Randall think that the PDF format will be eternal? I have some older PDFs that can still be opened with the latest Adobe Reader, but the formatting is all messed up and embedded graphics show up as gray boxes. How long till they're completely broke?
by Heimhenge
Wed Oct 18, 2017 8:55 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1904: Research Risks
Replies: 62
Views: 6097

Re: 1904: Research Risks

I immediately got that this was another Randall graph. But when I saw the vertical axis labeled as "RISK OF YOUR RESEARCH BEING USED BY A SUPERVILLAIN FOR WORLD DOMINATION" I had to wonder if "RISK" meant "DAMAGE" or if it meant "LIKELIHOOD" or "PROBABILI...
by Heimhenge
Thu Oct 12, 2017 11:15 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1901: "Logical"
Replies: 24
Views: 3749

Re: 1901: "Logical"

Otherwise how did anyone know ANYTHING before the scientific method was invented? This seems a tad silly to me. Things did get better after the scientific method, but that's because people are sometimes wrong, not ALWAYS wrong, without science. If you're referring to THE scientific method as attrib...

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