## Search found 68 matches

Mon Jul 11, 2016 5:15 am UTC
Topic: 1705: "Pokémon Go"
Replies: 57
Views: 14676

### Re: 1705: "Pokémon Go"

Damn. Ninja'd I am not ashamed that I have been playing this for the last several days. It sucks to be in a rural town though. I have to go a mile to get to the nearest Pokestop. On a different note, I wonder how easy it would be to troll people playing this game. I don't think the figurines would t...
Wed Mar 30, 2016 3:45 pm UTC
Topic: 1662: "Jack and Jill"
Replies: 106
Views: 24962

### Re: 1662: "Jack and Jill"

My neighbor up the hill has an artesian well while we have a 400-foot drilled well. My reaction when I found out was, "What is going on with the hydrology around here?" (I don't use language as strong as Randall's.) Apparently, it's something to do with the geological folding in the aquif...
Thu Feb 18, 2016 11:35 pm UTC
Forum: What If?
Topic: What-If 0146: "Stop Jupiter"
Replies: 60
Views: 33196

### Re: What-If 0146: "Stop Jupiter"

Ok so does this same principle apply to all other objects? If you were to blow up Titan (pump enough more energy than its gravitational binding energy into it), would Titan-dust scatter far and wide (getting sucked in by other nearby massive objects of course), or would Saturn just get another ring...
Thu Feb 18, 2016 9:48 pm UTC
Forum: What If?
Topic: What-If 0146: "Stop Jupiter"
Replies: 60
Views: 33196

### Re: What-If 0146: "Stop Jupiter"

I think the point Pfhorrest was making is that the gravitational binding energy is just the energy that would be required to scatter the planet if it were isolated - for a small enough body in close enough orbit around a larger body, the gravitational binding energy is much less than the object's o...
Thu Feb 18, 2016 8:03 pm UTC
Forum: What If?
Topic: What-If 0146: "Stop Jupiter"
Replies: 60
Views: 33196

### Re: What-If 0146: "Stop Jupiter"

The energy released however would not be enough to destroy the solar system. However, I cannot imagine that having bits of Jupiter rain on us would be good for the environment. Would the mass of Jupiter not just scatter out in a huge ring out at Jupiter's orbital distance? (And if so, would it not ...
Thu Feb 18, 2016 3:30 pm UTC
Forum: What If?
Topic: What-If 0146: "Stop Jupiter"
Replies: 60
Views: 33196

### Re: What-If 0146: "Stop Jupiter"

The problem is that Wolfram Alpha helpfully gives up while trying to calculate this velocity. We ultimately need a gamma value around 10^18. This value is so ridiculously large, that the probe would be traveling much, much faster than the Oh My God particle. In fact, the closest I could massage Wol...
Wed Feb 17, 2016 11:54 pm UTC
Forum: What If?
Topic: What-If 0146: "Stop Jupiter"
Replies: 60
Views: 33196

### Re: What-If 0146: "Stop Jupiter"

I still want to know the answer to the original what if question. Assume that some alien civilisation wants to cause Jupiter to impact our sun. These distant aliens have developed a mass driver that can launch an insane number of payloads that will reach our solar system with a trajectory such that...
Sun Aug 16, 2015 8:31 pm UTC
Topic: 1564: "Every Seven Seconds"
Replies: 35
Views: 8610

### Re: 1564: "Every Seven Seconds"

Ok, if it's not true, then explain why basically every response so far has focused on the sex part, rather than the made-up-sociology-statistics part! Aren't there some other xkcd strips about made-up pseudo-science we could be comparing this to? In the mean time, here's the SMBC  I was reminded of...
Fri Jul 24, 2015 8:03 am UTC
Topic: 1555: "Exoplanet Names 2"
Replies: 85
Views: 18682

### Re: 1555: "Exoplanet Names 2"

Is "Kevin Kostner" a typo, or a joke I'm not getting? Joke you're not getting. Kevin Kostner played in a movie called "Waterworld". The plot was simple. After massive global warming, the world was somehow covered in so much water that all humans are forced to sail to and from ci...
Fri May 29, 2015 6:52 pm UTC
Topic: 1531: "The BDLPSWDKS Effect"
Replies: 45
Views: 15931

### Re: 1531: "The BDLPSWDKS Effect"

Here I go explaining the joke: The Bernoulli effect states that air travels faster when pressure or potential energy drop. Used for air foils on air planes (along with Newton's third law). Doppler effect relates to compression of waves due to movement. This is where the "Tonal language" p...
Fri May 29, 2015 6:37 am UTC
Topic: 1531: "The BDLPSWDKS Effect"
Replies: 45
Views: 15931

### Re: 1531: "The BDLPSWDKS Effect"

Here I go explaining the joke: The Bernoulli effect states that air travels faster when pressure or potential energy drop. Used for air foils on air planes (along with Newton's third law). Doppler effect relates to compression of waves due to movement. This is where the "Tonal language" pa...
Wed Mar 11, 2015 7:15 am UTC
Topic: 1497: "New Products"
Replies: 53
Views: 9721

### Re: 1497: "New Products"

Damn... I was ninja'd (however that word is spelled). Here is what I wrote: Well this is clearly false. I told people that I was applying to be a glass explorer and that clearly worked out </sarcasm>. Sadly, a great many awesome products get released well before their time and then die in the market...
Fri Nov 28, 2014 4:56 pm UTC
Topic: 1453: "fMRI"
Replies: 28
Views: 9855

### Re: 1453: "fMRI"

This comic seems very timely given that I have just come back from Psychonomics 2014. I got to go to sunny and warm Long Beach so that I could sit for hours in a small, ice cold air-conditioned room while researchers talked about their research. A few of them were fMRI studies. In my field of decisi...
Thu Aug 21, 2014 6:00 pm UTC
Forum: What If?
Topic: What-If 0109: "Into the Blue"
Replies: 74
Views: 21775

### Re: What-If 0109: "Into the Blue"

And wouldn't every point in this laser become a black hole? Maybe, kind of. Any air particles in the path of the laser would become a black hole to us, unless the frequency produces a speed limit. More than likely, the frequency does pose a speed limit. At some point, the light is so heavily redshi...
Thu Aug 21, 2014 4:29 am UTC
Forum: What If?
Topic: What-If 0109: "Into the Blue"
Replies: 74
Views: 21775

### What-If 0109: "Into the Blue"

http://what-if.xkcd.com/109/ http://what-if.xkcd.com/imgs/a/109/planet.png This is probably the funniest way I can imagine ending this debate. That said, I wonder how this would scale. Lasers do not have a perfect focus. As such, I would expect that at very large distances, the radius of destructio...
Wed Jun 25, 2014 4:10 am UTC
Topic: 1386: "People are Stupid"
Replies: 256
Views: 48096

### 1386: "People are Stupid"

http://imgs.xkcd.com/comics/people_are_stupid.png title="To everyone who responds to everything by saying they've 'lost their faith in humanity': Thanks--I'll let humanity know. I'm sure they'll be crushed." I frequently have to inform my friends that I have more faith in humanity than th...
Tue Jan 07, 2014 6:25 pm UTC
Forum: What If?
Topic: What-If 0078: "T-Rex Calories"
Replies: 54
Views: 14871

### Re: What-If # 0078 T-Rex Calories

Even ignoring the costs of genetic reconstruction in a Jurassic park sort of way, at 80 hamburgers a day (approx \$80 per day) only the rich could afford them. One Tyrannosaur would cost 29,000 per year to feed. Not to mention costs of waste removal, thirty foot high electric fences, and a computing ...
Fri Aug 23, 2013 3:45 pm UTC
Topic: 1255: "Columbus"
Replies: 93
Views: 25112

### Re: 1255: "Columbus"

What's the smallest man-made object visible from space? We can take "visible from space" to mean "visible to the naked eye from the ISS when there aren't any clouds blocking the view". Could one of the ISS astronauts see a laser pointer at night if it was trained on the ISS? Ass...
Mon Jun 17, 2013 4:23 am UTC
Topic: 1226: "Balloon Internet"
Replies: 66
Views: 18694

### Re: 1226: "Baloon Internet"

Sigh... if only that were a viable buisness model. Making a 99% profit from Verizon's losses is probably very unethical, but one can dream.
Fri Mar 15, 2013 8:19 pm UTC
Topic: 1186: "Bumblebees"
Replies: 90
Views: 23514

### Re: 1186: "Bumblebees"

The way I'd always heard it at least implied that bumblebees can't fly because they're too fat for their tiny little wings. Which I don't even need to know any complicated physics to know is baloney; I can demolish it with science I learned on TV Tropes . (It should be quiet in here for a while.) Y...
Mon Mar 04, 2013 7:13 am UTC
Topic: 1181: "PGP"
Replies: 52
Views: 25360

### Re: 1181: "PGP"

I laughed because I am the security obsessed one in my family. In the past two years, I have tried to get my friends and family to support GPG encrypted and signed e-mail, scrambled cellphone calls (apparently the ability to encrypt your calls only works if the other person does it too, or you have ...
Fri Mar 01, 2013 6:20 am UTC
Topic: 1180: "Virus Venn Diagram"
Replies: 82
Views: 21688

### Re: Virus Venn Diagram

I keep my computer in good condition and with every security protocol I can activate erm... activated. I have had one virus infection in the last four years. I was one of the lucky ones to get infected on day one of the virus being written. I have first hand knowledge of how long it takes virus defi...
Wed Feb 27, 2013 7:23 am UTC
Topic: 1179: "ISO 8601"
Replies: 379
Views: 102475

### Re: 1179: "ISO 8601"

I must attack this ISO standard. It is obvious why we do not use this format (YYYY-MM-DD). We have ordered the date by quantity of information it imparts. For example, if you ask me the date, and I tell you it is 2013, you would probably be taken aback by my apparent idiocy. Obviously you wanted mor...
Fri Feb 15, 2013 7:11 pm UTC
Topic: 1174: "App"
Replies: 56
Views: 17349

### Re: 1174: "App"

As usual, this app neglects to mention a few important details: Terms and Conditions When you download our app, you agree to give us your email address (all of them, if you have more than one), real name (and all of your aliases, nicknames, and screen names if you have any), address, social securit...
Wed Feb 13, 2013 5:25 am UTC
Topic: 1173: "Steroids"
Replies: 156
Views: 35184

### 1173: "Steroids"

http://imgs.xkcd.com/comics/steroids.png title text:"A human is a system for converting dust billions of years ago into dust billions of years from now via a roundabout process which involves checking email a lot." A human is a way to increase entropy of a system by way of air conditioner...
Mon Feb 11, 2013 5:27 am UTC
Topic: 1172: "Workflow"
Replies: 57
Views: 23282

### Re: 1172: "Workflow"

This is one of the funniest XKCDs I have read in awhile. Partly because part of my job at Fry's is to convince people to not do things like this. I remember trying to convince a guy that putting a window air conditioner in your car was not a good idea. Until then, it never would have occurred to me ...
Wed Feb 06, 2013 6:42 am UTC
Topic: 1170: "Bridge"
Replies: 135
Views: 30387

### Re: 1170: "Bridge"

This has been the best reply I have ever read for anything my parents used to tell me. It is so good, and so damn obvious, that frankly I am depressed that I have not thought about it before. Good job Randall, Good job.
Mon Feb 04, 2013 6:42 am UTC
Topic: 1169: "Expedition"
Replies: 58
Views: 12705

### Re: 1169: "Expedition"

Since you beat me by a minute on the post, I suppose I should post my bit here instead before they delete my thread. I once spent an hour looking at the blue marble pics of the arctic circle imagining myself trekking along an ice shelf. Sadly I forgot where to get those pics. Additionally, the Earth...
Mon Feb 04, 2013 6:36 am UTC
Topic: 1169: "Expedition"
Replies: 58
Views: 12705

### 1169: "Expedition"

http://imgs.xkcd.com/comics/expedition.png Title text: I'm pretty sure I've logged more hours in Google Maps over the past decade than in any game. I once spent an hour looking at the blue marble pics of the arctic circle imagining myself trekking along an ice shelf. Sadly I forgot where to get tho...
Tue Dec 04, 2012 9:34 am UTC
Forum: What If?
Topic: What-If 0023: "Short Answer Section II"
Replies: 80
Views: 22456

### What-If 0023: "Short Answer Section II"

http://what-if.xkcd.com/ "If my printer could literally print out money, would it have that big an effect on the world?" "What would happen if you exploded a nuclear bomb in the eye of a hurricane? Would the storm cell be immediately vaporized?" "If everyone put little turb...
Mon Nov 26, 2012 7:26 am UTC
Topic: 1139: "Rubber and Glue"
Replies: 55
Views: 29111

### Re: 1139: "Rubber and Glue"

Being a substitute teacher was bad enough without worrying that a student might try to snipe me. I am a little too suceptible to that for my comfort.
Thu Nov 08, 2012 6:12 am UTC
Forum: What If?
Topic: What-If 0019: "Tie Vote"
Replies: 57
Views: 33575

### Re: What-If 0019: Tie vote

I figured I should add this as I am a resident fo Nevada. When a tie occurs, the winner is chosen not by coin toss, but by a game of high card. If I remember correctly, one of our AGs was elected because of this rule. It makes me wonder what would happen if the election was between say Lance Burton ...
Mon Nov 05, 2012 7:04 am UTC
Topic: 1130: "Poll Watching"
Replies: 87
Views: 17772

### Re: 1130: "Poll Watching"

I know some people like that. I kinda want to throw my 10lb stats book at them.
Tue Oct 30, 2012 7:17 pm UTC
Forum: What If?
Topic: What-If 0018: "B.B. Gun"
Replies: 59
Views: 18313

### Re: What-If 0017: BB Gun

It's been a long time since I did any physics; Would switching to lead pellets instead of BBs (this is still within the confines of "BB gun") result in greater or lesser stopping power due to the pellets not bouncing back at the shooters? Does the increased mass of the train due to all th...
Tue Oct 30, 2012 6:41 pm UTC
Forum: What If?
Topic: What-If 0018: "B.B. Gun"
Replies: 59
Views: 18313

### Re: What-If 0017: BB Gun

keithl wrote: but to date he has only built 4000 m/s guns.

Comments like this are why I love the forums. I can't think of anywhere else someone can refer to a speed in excess of Mach 12 as being 'only' that fast. You have been awarded one internet.
Fri Oct 05, 2012 4:20 am UTC
Topic: 1117: "My Sky"
Replies: 58
Views: 16535

### Re: 1117: "My Sky"

I cannot remember a time I looked up at the night sky and wasn't completely captivated by the expanse of stars. Sometimes I am depressed by the fact that dust blocks even more of that, but given that I can barely comprehend what I already see, I suppose I'm good. Living in the rurals does have some ...
Thu Aug 16, 2012 4:26 pm UTC
Forum: What If?
Topic: What-if 0007: "Everybody Out"
Replies: 350
Views: 66103

### Re: What-if 0007: Everybody Out

What does that post have to do with what you quoted? Did Manabu say anything about temperature or the primary cause of drag? His point was observational. Specifically that the atmosphere is much thinner up high yet re-entry hits 6 Gs, whereas I calculated a -.8 G force from deceleration upon exitin...
Thu Aug 16, 2012 5:11 am UTC
Forum: What If?
Topic: What-if 0007: "Everybody Out"
Replies: 350
Views: 66103

### Re: What-if 0007: Everybody Out

I assume that the launch platform could not exceed 1km (the height of a tall skyscraper). I originally calculated Df ~ 7.2156*10^7. This corresponds to a deceleration rate of about 7m/s^2. This is slightly less than one g. Finally a good reason for heavy rockets. Also the boosters could be fired up...
Wed Aug 15, 2012 8:55 pm UTC
Forum: What If?
Topic: What-if 0007: "Everybody Out"
Replies: 350
Views: 66103

### Re: What-if 0007: Everybody Out

Well, my idea is more like a mass driver... only more human friendly. As for charges of infeasablility regarding g-forces. As mentioned before, the vehicle can be inclined gradually and the track itself can be largely underground. CERN is good proof that this is technologically feasible, though i d...
Wed Aug 15, 2012 5:28 am UTC
Forum: What If?
Topic: What-if 0007: "Everybody Out"
Replies: 350
Views: 66103

### Re: What-if 0007: Everybody Out

Well, my idea is more like a mass driver... only more human friendly. I'm picturing it as an orbital elevator with a mass driver on the end. Is this right? An orbital elevator (space elevator) is a long cable and counter-weight attached to the earth at the equator. A climber (mechanical or electrom...