Search found 71 matches

by Zak McKracken
Wed Jan 11, 2012 10:57 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0887: "Future Timeline"
Replies: 192
Views: 58260

Re: 0887: "Future Timeline"

Looks like the first prediction was incorrect... Actually, the whole 2012 predictions are incorrect, the first one being closest to truth - World population has reached 7 Billion in December 2011, thus pretty close to 2012 (but of course not quite there) - Flying cars reach market: There's a model ...
by Zak McKracken
Tue May 31, 2011 5:33 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0905: "Homeownership"
Replies: 84
Views: 20852

Re: 0905: "Homeownership"

Hmm... in Germany (at least where I live) it's no problem to drill holes in rented apartments' walls. In the last two apartments I even drilled completely through, to get the ethernet cable into the next room :) Usually, all that the owner demands is that you fill the holes with putty before you mov...
by Zak McKracken
Tue Apr 26, 2011 1:28 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0887: "Future Timeline"
Replies: 192
Views: 58260

Re: 0887: "Future Timeline"

It's also quite interesting that apparently many people claim that investing money in ways to kill people helps the economy while investing money to help people damages the economy. The more you suffer, the more it shows you really care? Government contractors and weapons manufacturers hire a lot o...
by Zak McKracken
Tue Apr 19, 2011 3:34 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0887: "Future Timeline"
Replies: 192
Views: 58260

Re: 0887: "Future Timeline"

Dammit, I think you could open a sub-thread for any of those predictions. This comic is just sooo full of stuff to discuss. Great one, I'll print that out and put it in the coffee-break room. We'll have topics for the next year. What I find interesting is what e.g. the debt predictions (paid off/exp...
by Zak McKracken
Tue Apr 19, 2011 3:16 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0887: "Future Timeline"
Replies: 192
Views: 58260

Re: 0887: "Future Timeline"

2025: 62MPG cars introduced This may be a Google result, but the prediction is a bit late. If you live in Europe, and don't mind a slightly underpowered car, Volkswagen has all ready made this happen. http://en.wikipedia.org/wiki/Volkswagen_Polo#Polo_Mark_V_.28Typ_6R.2C_2009.E2.80.93present.29 The ...
by Zak McKracken
Fri Mar 18, 2011 11:14 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0874: "Time Management"
Replies: 56
Views: 14650

Re: 0874: "Time Management"

This comic and this one: http://xkcd.com/862/ pretty much sum up my life recently. But the alt text really really topped that. Although that may be only because it gives me an excuse to not make a schedule in the first place ... dammit! More serious and slightly off topic: I think many people* are m...
by Zak McKracken
Tue Mar 08, 2011 12:21 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0869: "Server Attention Span"
Replies: 90
Views: 26072

Re: 0869: "Server Attention Span"

I use Opera now. They tend to be able to fool most servers into thinking you have a full HTML pc like browser. Fun fact: I know some sites that will serve Opera the reduced-content mobile version regardless of the device it's running on. Which looks kind of funny on a 23" screen ... try this o...
by Zak McKracken
Thu Nov 04, 2010 12:04 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

Note well that in a 2D flow diagram the net downwash is exactly zero, Ha, gotcha! That's wrong. It's not zero, and it shouldn't be. The flow leaves the trailing edge of the airfoil at an angle, so there must be a certain downwash. If you draw parallel streamlines, they should end up slightly lower ...
by Zak McKracken
Thu Oct 21, 2010 12:53 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

I hope this explanation makes more sense to you ... if not, feel free, this is actually really good exercise 8) I'll just need to find out how to use fewer words. Excellent exercise, combing greasy knots out of my brain. Now I understand... (everything)^2 !!! I'm sorry to disagree there. But the fu...
by Zak McKracken
Fri Oct 15, 2010 10:21 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

Ahhh.... I think I understand your problem. A bit. No, the force that the air you pushed around exerts on the ground does not "suddenly" go to zero. It gradually goes to zero. Bingo, that's the problem ...because in a 2D world the net force on the ground doesn't gradually go to zero. It d...
by Zak McKracken
Fri Oct 15, 2010 3:46 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

And then it gets WORSE: It's impossible to understand airplanes by only employing 2D flow diagrams. These diagrams depict an odd sort of "flatland flight" where no work is performed on the air, and an airfoil could ideally coast along forever. While it's true that most 2D flow diagrams yo...
by Zak McKracken
Fri Oct 15, 2010 2:07 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

Can anyone here actually answer that student's question? How is lift generated? There are many explanations for the generation of lift found in encyclopedias, in basic physics textbooks, and on Web sites. Unfortunately, many of the explanations are misleading and incorrect. I could not agree more T...
by Zak McKracken
Sun Oct 10, 2010 1:04 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

I don't know if its been mentioned or not but physics is not an exact science. Physics is based on the concept of mass, but what is mass? How is it measured? Physics is an exact science, but aerodynamics stopped being about physics a long time ago. All the laws required for aerodynamics are known. ...
by Zak McKracken
Sat Oct 09, 2010 9:04 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

And I was all like "But what about Negative Numbers?" And she was like "Fuck you." So by this argument we should introduce imaginary number as soon as we introduce the root function. Actually, no. I had my share of these things in school, and I often got answers along the lines ...
by Zak McKracken
Sat Oct 09, 2010 8:44 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

Even in flight school they still try to pass this off... yep. I saw a documentary the other day, and they asked a test pilot (and former aerobatic national champion) to explain how an airfoild generates lift. He gave exactly this stupid explanation. Then they went and measured the upper suface of a...
by Zak McKracken
Sat Oct 09, 2010 1:34 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

We've all been taught that the force of friction equals Normal Force times coefficient of friction, right? And that the height, width, and length of the object don't factor into that calculation, right? Well then why is it that wider tires on cars and trucks provide better braking power? Or is the ...
by Zak McKracken
Sat Oct 09, 2010 12:59 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

Bernoulli reverses cause and effect in any case. The air goes faster because it ran down a pressure gradient from high to low pressure; the speed didn't cause the pressure change but rather responds to it. No. It's just frequently misunderstood that way. And yes ... air does respond to pressure. 1....
by Zak McKracken
Sat Oct 09, 2010 12:41 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

In fact, I wonder whether any structural components on the wing are sized by the negative-g condition, i.e. are stressed more highly by negative gs than, say, by a high positive-g turn. Yes, there are. If the wing was massive, that'd be zero problem, but it's made up of stringers and ribs (and skin...
by Zak McKracken
Sat Oct 09, 2010 12:19 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

does anyone know the Cooefficent of lift for a NASA or NACA0015 airfoile with a reynolds number of about 40-50,000? all the published data I can find starts at 80k or higher You can use XFLR5 to get a really good approximation. (available at sourceforge) With free transition, I understand why there...
by Zak McKracken
Fri Oct 08, 2010 3:48 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

There is false biology being taught to defend evolution, like a human fetus having gill slits and the human tail bone is of no use, when it's an anchor point for some muscles. Yes, I'm the creationist joining the debate. Ok, so when someone explains lift on an airfoil wrong, you don't think airplan...
by Zak McKracken
Fri Oct 08, 2010 3:20 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

From the viewpoint of western civilisation, and thus the viewpoint of the majority of schoolbook-makers in America, it was in fact discovered by Columbus, because before that noone that he knew (and noone anyone knew that he knew and so on) knew it existed. The viewpoint of Western Civilization isn...
by Zak McKracken
Fri Oct 08, 2010 1:27 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

the one that got me: elementary school: columbus discovered america. jr high: vikings discovered america. me: wait, they're teaching us lies on purpose? Asians discovered America about 8000 years (+/- 6000 years BECAUSE I DO NOT REMEMBER) before the Vikings. In my view that's just nitpicking, not d...
by Zak McKracken
Fri Oct 08, 2010 1:14 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Re: 0803: "Airfoil"

http://amasci.com/miscon/miscon4.html has some pretty shocking stuff. That entire page seems to be one giant misconception. Every article I looked at before giving up spent a long time building a wicker man, then they didn't even disprove the subject. Instead they seemed to like taking some small, ...
by Zak McKracken
Fri Oct 08, 2010 12:44 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0803: "Airfoil"
Replies: 243
Views: 102074

Thank you

This comic is a gift. I'll print it out and stick it right to our wind tunnel. I'm involved in a project where we teach Schoolchildren (and their Teachers!) about aerospace stuff, and this "theory" has been a huge nuisance, alhtough most Teachers don't mind being told how it really works, ...
by Zak McKracken
Fri Sep 17, 2010 8:36 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0794: "Inside Joke"
Replies: 131
Views: 34530

Re: ''Inside Joke'' Discussion (#794)

Kids these days, y'know? I mean... those days. No wonder the world is so messed up, if kids like those ended up in charge. It's the same thing, happening over and over, and it's been going on for centuries! Maybe all the 'in our day, kids were taught to behave better' is just a bluff to guilt your ...
by Zak McKracken
Thu Jul 22, 2010 2:25 pm UTC
Forum: Serious Business
Topic: The US Abolishes its Military: What would happen?
Replies: 80
Views: 13228

Re: The US Abolishes its Military: What would happen?

People who hold that trade is the key to world peace should remember a couple of key things: Alright, you have a point. But not as many as you think :) 2.) Prior to WWII, Germany's biggest trading partners were places like France, the USSR, the USA an the UK. The USSR and Germany had a particularil...
by Zak McKracken
Thu Jul 22, 2010 1:15 pm UTC
Forum: Serious Business
Topic: The US Abolishes its Military: What would happen?
Replies: 80
Views: 13228

Re: The US Abolishes its Military: What would happen?

You can't see the US paying down it's debt with the budget currently set aside for military spending. If you suddenly unemploy all 700,000 civilian and 1,418,542 military employees of the Defense Department, that $651 billion dollar budget is going to need to go to finding vocations for all of the ...
by Zak McKracken
Thu Jul 22, 2010 12:33 pm UTC
Forum: Serious Business
Topic: The US Abolishes its Military: What would happen?
Replies: 80
Views: 13228

Re: The US Abolishes its Military: What would happen?

Building tanks, bombs and other stuff that will only ever be used to destroy other things is not a productive thing (productive in the sense of "economically productive, i.e. not producing anything nor increasing living standards). Granted, people make a living on it, but assuming (which in th...
by Zak McKracken
Sun Jul 18, 2010 9:14 pm UTC
Forum: Serious Business
Topic: The US Abolishes its Military: What would happen?
Replies: 80
Views: 13228

Re: The US Abolishes its Military: What would happen?

Since most of the discussion focuses on military consequences, here's something about the economy: The US government spends an awful lot of money on the military. Not just on weapons, also on personnel. Now, if that would stop, lots of companies who are producing for the military (not just weapons, ...
by Zak McKracken
Fri Jan 01, 2010 10:30 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0683: "Science Montage"
Replies: 85
Views: 53192

Re: "Science Montage" Discussion

The comic has some small but important flaws: 1. In real life, there'd be only one person doing the investigation (has the other guy nothing to do?) 2. a. During the hours the device takes for the analysis, she would be elsewhere, work on papers, grant applications, project reports and whatnot. b. T...
by Zak McKracken
Mon Dec 07, 2009 8:43 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0672: "Suggestions"
Replies: 90
Views: 22729

Re: "Suggestions" Discussion

Sometimes I'd like to get a facebook account only to be able to understand these jokes. But then something about facebooks jokes tells me not to, so I think I'll happily continue living in ignorance.

Zak
by Zak McKracken
Wed Dec 02, 2009 1:02 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0670: "Spinal Tap Amps"
Replies: 110
Views: 32126

Re: "Spinal Tap Amps" Discussion

L O L

This strip hits the nail on the head, not much more to say


... but that needed saying, really.
by Zak McKracken
Mon Nov 02, 2009 10:30 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0657: "Movie Narrative Charts"
Replies: 337
Views: 151482

Re: "Movie Narrative Charts" Discussion

Hooookay, now I have to go and get that "Primer" movie. It doesn't seem to be avaulable on the European mainland, so I'll have to order from the UK, which means I'll pay twice the price. ... but thanks for pointing me to it! Also: The hobbits meet Aragorn in Bree, at the Prancing Pony. Qui...
by Zak McKracken
Wed Mar 11, 2009 9:03 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0554: "Not Enough Work"
Replies: 129
Views: 26246

Re: "Not Enough Work" Discussion

Correlation between reading XKCD and efficiency of work? Most probably, but I wouldn't know whether it's good or bad for work. Causation? Hmm.. who knows ... Randall, I hope your not rying to make people stop reading your comics at work, are you? And about web design there is only one reference: htt...
by Zak McKracken
Tue Jan 13, 2009 8:39 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0529: "Sledding Discussion"
Replies: 74
Views: 17421

Re: "Sledding Discussion" Discussion

I'm pretty sure that's not how plasticity works--I think that you can still learn a language fluently for pretty much the rest of your life, it's just that you won't have that great of an accent. I started learning Romanian at the age of 30, and after half a year, when I was still barely able to sa...
by Zak McKracken
Mon Sep 22, 2008 6:46 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0479: "Tones"
Replies: 239
Views: 40899

Re: "Tones" Discussion

When I read the cartoon, I thought "yep, me too". But right now I'm not even sure what noise my mobile phone makes. It's on vibration 99% of the time, and when it's not, It's either turned off or I'm at home right beside a "real" telephone, so noone needs to call me on the mobile...
by Zak McKracken
Fri Aug 15, 2008 9:58 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0463: "Voting Machines"
Replies: 108
Views: 33060

Re: "Voting Machines" discussion

Voting should be the poster child for STUFF YOU DON'T SEND THROUGH THE INTERNET!!! I can't think of any other viable way to do this easily, but sending it through the internet is low on my list. If you're talking about a situation where voting machines need to report back to headquarters in a secur...
by Zak McKracken
Wed Jun 25, 2008 7:44 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0437: "SUV"
Replies: 181
Views: 30051

Re: "SUV" Discussion

Yes, and the cartoon features a green vehicle. So the subject of discussion is green vehicles and the environment. We would not have even gotten onto the topic of government regulation if not for the fact that government regulation has made green vehicles popular and had detrimental effects as a re...
by Zak McKracken
Tue Jun 24, 2008 11:17 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0437: "SUV"
Replies: 181
Views: 30051

Re: "SUV" Discussion

The Topic is this Cartoon here... Yes, and the cartoon features a green vehicle. So the subject of discussion is green vehicles and the environment. We would not have even gotten onto the topic of government regulation if not for the fact that government regulation has made green vehicles popular a...
by Zak McKracken
Tue Jun 24, 2008 7:03 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0437: "SUV"
Replies: 181
Views: 30051

Re: "SUV" Discussion

On my side of the Atlantic Ocean the government isn't just tolerated but expected to provide certain services So why can't people opt out of the system, and why can't private competitors exist? If people all want a service to be provided by the government, I'm sure they'll elect officials to those ...

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