Search found 158 matches

Wed Nov 27, 2013 4:32 am UTC
Forum: What If?
Topic: What-If 0073: "Lethal Neutrinos"
Replies: 132
Views: 70351

Re: What-If 0073: "Lethal Neutrinos"

Now I'm wondering about the physics of that feather knocking you over. It seems like it would be similar to the can-you-boil-tea-by-stirring question. Sure, you could take sufficient energy to boil the tea and impart it via a stirring motion... but as a consequence of other factors you're not going...
Wed Oct 16, 2013 1:00 am UTC
Forum: What If?
Topic: What-if 0067: "Expanding Earth"
Replies: 62
Views: 15246

Re: What-if 0067: "Expanding Earth"

I'm surprised no one has yet brought up the conservation of angular momentum. As Earth gets bigger, it must slow down. What would that then do to the atmosphere? I would believe that the inertia of the atmosphere is only loosely coupled with Earth's motion.so would we be beset by huge gale force wi...
Fri Oct 11, 2013 2:19 pm UTC
Topic: 1276: "Angular Size"
Replies: 98
Views: 26305

Re: 1276: "Angular Size"

Wait, wouldn't the angular sizes of the planets vary depending on their positions in their orbits relative to Earth? Particularly with Mars and Venus.
Tue Oct 08, 2013 4:48 pm UTC
Forum: What If?
Topic: What-if 0066: "500 MPH"
Replies: 61
Views: 15131

Re: What-if 0066: "500 MPH"

In regard to the original question, I believe it has been calculated that a tornado with 90 mph (145 km/h) winds could pick someone up. I'm guessing that's a windspeed which can lift an unattached body? As all kite-fliers know, having a tether line lets you get a kite airborne with almost no wind, ...
Tue Oct 08, 2013 3:12 pm UTC
Forum: What If?
Topic: What-if 0066: "500 MPH"
Replies: 61
Views: 15131

Re: What-if 0066: "500 MPH"

The wind leaning chart given would not work for a tornado, as wind in a tornado has a significant vertical component to them, though it would still probably work in a hurricane. Wind becomes so much more interesting when it isn't just horizontal. In regard to the original question, I believe it has ...
Fri Sep 06, 2013 3:30 am UTC
Forum: What If?
Topic: What-if 0061: "Speed Bump"
Replies: 72
Views: 18579

Re: What-if 0061: "Speed Bump"

One thing bothered me about this article... While I agree that there are no road speeds at which a bump would kill the driver (because the suspension and wheels will tear themselves to shred absorbing the force of the impact), most modern cars have very low aerodynamic lift. Some have zero lift and...
Fri Aug 30, 2013 5:46 am UTC
Topic: 1258: First
Replies: 72
Views: 21766

Re: 1258: First

I think I know why:
http://www.xkcd.com/493/
Tue Aug 20, 2013 3:22 pm UTC
Forum: What If?
Topic: What-If 0059: "Updating a Printed Wikipedia"
Replies: 34
Views: 28674

Re: What-If 0059: "Updating a Printed Wikipedia"

In my experience, it seems to me that reverting an edit occurs far more often than an edit that affects multiple pages. There is always an edit war going on somewhere.
Sat Aug 17, 2013 9:06 pm UTC
Topic: 1252:"Increased Risk"
Replies: 45
Views: 11692

Re: 1252:"Increased Risk"

Moose Anus wrote:I just hope there aren't any sharks with frickin' handgun wielding dogs attached to their heads.

That might be the sequel to Sharknado.
Sat Aug 10, 2013 4:20 pm UTC
Forum: General
Topic: Sleep-time holodeck experiences
Replies: 3404
Views: 766784

Re: What were your dreams last night?

I dreamed last night that I was a pegasus pony. I wanted to fly away to do something (I can't remember what) but Snape and a Wikipedia editor wouldn't let me.
Sat Aug 10, 2013 12:27 am UTC
Topic: 1249: "Meteor Showers"
Replies: 49
Views: 48525

Re: 1249: "Meteor Showers"

geospacedman wrote:You can get stationary meteors - they're called 'point source meteors' and occur when the meteor is heading straight for you.

Better hope it's not a Chelyabid, then.
Fri Aug 09, 2013 5:56 am UTC
Topic: 1249: "Meteor Showers"
Replies: 49
Views: 48525

Re: 1249: "Meteor Showers"

Wow. Quite some time since we've seen a raptor joke.
Tue Aug 06, 2013 3:50 pm UTC
Forum: What If?
Topic: What-If 0057: "Dropping a Mountain"
Replies: 61
Views: 19377

Re: What-If 0057: "Dropping a Mountain"

Assuming the one foot gap is filled with air at a desnity typical of the altitude of the mountain's base, how fast of an air blast would you get?
Thu Aug 01, 2013 4:36 pm UTC
Topic: 1245: "10-Day Forecast"
Replies: 58
Views: 22997

Re: 1245: "10-Day Forecast"

TEN day forecast? The weather dot com website can't even manage consistent predictions for three HOURS in advance. At least, not where I live, which is a mountainous region in the Appalachians, so okay, that's pretty difficult. Even so, I have to laugh when I see weather forecasts extending 7 days ...
Wed Jul 17, 2013 6:40 am UTC
Topic: 1239: "Social Media"
Replies: 34
Views: 11141

Re: 1239: "Social Media"

The asteroid was busy tweeting, so it didn't see the planet in its path.
Tue Jul 16, 2013 3:38 pm UTC
Forum: What If?
Topic: What-If 0054: "Drain the Oceans: Part II"
Replies: 60
Views: 48412

Re: What-If 0054: "Drain the Oceans: Part II"

I was considering the height of the portal above Mars' surface as well. If the portal is not place high enough the pressure at the Earth side and the Mars side of the portal would be the same and the flow would stop.
Tue May 14, 2013 3:29 pm UTC
Topic: 1211: "Birds and Dinosaurs"
Replies: 298
Views: 63886

Re: 1211: "Birds and Dinosaurs"

Birds are dinosaurs in the sense that sliders are hamburgers. If you ignore size, sliders look a lot like hamburgers. Their internal structures are nearly identical to those of hamburgers. But if I order a hamburger and you give me a slider, you'll have a dissatisfied customer on your hands. Same t...
Mon May 13, 2013 4:35 am UTC
Topic: 1211: "Birds and Dinosaurs"
Replies: 298
Views: 63886

Re: 1211: "Birds and Dinosaurs"

Djehutynakht wrote:

I wonder what a Pegasus with bat wings would look like...

Actually, bat winged pegasi have turned up in My Little Pony of all places.
http://browse.deviantart.com/art/Luna-s ... -265068437

Also seen a feathered dragon here or there.
Mon May 13, 2013 4:15 am UTC
Topic: 1211: "Birds and Dinosaurs"
Replies: 298
Views: 63886

Re: 1211: "Birds and Dinosaurs"

I've thought it was interesting that when it comes to mythological creatures, reptilian creatures, mostly dragons, are depicted with bath wings even though bats are mammals while mammals (e.g. Pegasus) are given bird wings, even though birds are more closely related to modern reptiles.
Fri May 03, 2013 4:17 am UTC
Topic: 1207: "AirAware"
Replies: 39
Views: 9654

Re: 1207: "AirAware"

Quicksilver wrote: Also curious as to whether the WRONG refers to yelling at strangers from the sky or the business making money.

I think it's the second one. A business does not have to make money if it's run by BHG. People suffering is payment enough.
Sun Apr 21, 2013 6:29 am UTC
Forum: What If?
Topic: What-If 0040: "Pressure Cooker"
Replies: 117
Views: 58151

Re: What-If 0040: "Pressure Cooker"

Well remember: The Emperor is not as forgiving as I am. -Darth Vader So fluorine is forgiving in pretty much the same sense that Darth Vader is. So you are saying that fluorine could be possibly eventually turned to the light side and convinced to sacrifice itself to kill FOOF, which is irredeemabl...
Sat Apr 20, 2013 2:03 pm UTC
Forum: What If?
Topic: What-If 0040: "Pressure Cooker"
Replies: 117
Views: 58151

Re: What-If 0040: "Pressure Cooker"

"At seven hundred freaking degrees, fluorine starts to dissociate into monoatomic radicals, thereby losing its gentle and forgiving nature. But that's how you get it to react with oxygen to make a product that's worse in pretty much every way." That is sarcasm. Right? He did not, really, ...
Fri Apr 12, 2013 6:28 am UTC
Topic: 1198: "Geologist"
Replies: 44
Views: 11358

Re: 1198: "Geologist"

Freiberg wrote:Is this the same guy who hunts tornadoes, from 640?

No, it's his brother.
Wed Apr 10, 2013 5:19 am UTC
Forum: What If?
Topic: What-If 0040: "Pressure Cooker"
Replies: 117
Views: 58151

Re: What-If 0040: "Pressure Cooker"

Is Randall reading the forums? FOOF came up in the discussion for Interplanetary Cessna.
Sun Mar 17, 2013 2:55 am UTC
Forum: What If?
Topic: What-If 0036: "Cornstarch"
Replies: 36
Views: 16582

Re: What-If 0036: "Cornstarch"

BunsenH wrote:
At the bottom, the combination of heat and pressure drive off volatiles, leaving coal.

I did a quick calculation using the density of water (I think oobleck is denser) and found that pressure at a depth would be about 47 gigpascals which I believe is more than enough to produce diamond.
Fri Mar 15, 2013 4:20 am UTC
Topic: 1186: "Bumblebees"
Replies: 90
Views: 22754

1186: "Bumblebees"

http://imgs.xkcd.com/comics/Bumblebees.png Alt Text: "Did you know sociologists can't explain why people keep repeating that urban legend about bumblebees not being able to fly!?" If I remember it correctly it all goes back to one guy getting his math wrong. Also, is this a reference to B...
Mon Feb 04, 2013 7:33 am UTC
Forum: What If?
Topic: What-If 0030: "Interplanetary Cessna"
Replies: 108
Views: 35136

Re: What-If 0030: Interplanetary Cessna

Of interest -- oxygen as "fuel" (carried / consumed) and free hydrocarbon "air" is much less efficient (per unit mass) than hydrocarbon "fuel" and free oxygen "air". What about some other fuel such as oxygen difluoride? Fluorine has an even higher atomic weig...
Sat Feb 02, 2013 7:47 am UTC
Forum: What If?
Topic: What-If 0030: "Interplanetary Cessna"
Replies: 108
Views: 35136

Re: What-If 0030: Interplanetary Cessna

BeagleFury wrote:
Of interest -- oxygen as "fuel" (carried / consumed) and free hydrocarbon "air" is much less efficient (per unit mass) than hydrocarbon "fuel" and free oxygen "air".

What about some other fuel such as oxygen difluoride?
Fri Feb 01, 2013 7:01 am UTC
Forum: Science
Topic: Worst thing you've seen in a lab
Replies: 256
Views: 232200

Re: Worst thing you've seen in a lab

My chemistry teacher from high school used to give a demonstration of acids and bases that would end with him mixing HCl and NaOH then drinking the result. He stopped doing that once he though about what would happen if he messed up the measurements. Oh we did this too (in fact in more than one ins...
Wed Jan 30, 2013 4:41 pm UTC
Topic: 1167: "Star Trek into Darkness"
Replies: 156
Views: 57949

Re: 1167: "Star Trek into Darkness"

I've seen a few lengthy discussions on wikipedia and participated in some of them. The silliest of these was where in the Hurricane Sandy article we should mention the popular name "Superstorm Sandy" and whether or not the text should be boldface. A similar debate has come up several times...
Wed Jan 30, 2013 5:26 am UTC
Topic: 1167: "Star Trek into Darkness"
Replies: 156
Views: 57949

Re: 1167: "Star Trek into Darkness"

This reminds me of the fact that Wikipedia has a list of lamest edit wars.
Though There is a difference between a discussion and an edit war.
Mon Jan 28, 2013 8:27 am UTC
Topic: 1166: "Argument"
Replies: 177
Views: 36334

Re: 1166: "Argument"

Well, found this video This whole thing is making me wonder how he actually got each device to work (other than the train as that one was hardly perpetual motion). The YouTube comments say that the flask has a pump hooked up to it And I seriously want to see that thread EDIT: However, toast does no...
Wed Jan 23, 2013 3:45 pm UTC
Forum: What If?
Topic: What-If 0029: "Spent Fuel Pool"
Replies: 167
Views: 45778

Re: What-If 0029: Spent Fuel Pool

I saw a great article about storing radiation so that we can tell people thousands of years in the future that it is unsafe about how they would convey by architecture and symbols "do not dig this up you idiot, man did some stupid stuff here and do not disturb it" I cannot find it unfortu...
Wed Jan 16, 2013 3:49 am UTC
Forum: General
Replies: 1405
Views: 240518

It was my gamertag for Star Wars: Battlefront. Whenever someone killed by the message would come up "Unit [number] killed Himself." Elsewhere, many of my usernames on other sites contain "Ridley" in some fashion as I went through a phase when I was obsessed with dragons and was r...
Sun Jan 06, 2013 5:19 am UTC
Forum: Science
Topic: Worst thing you've seen in a lab
Replies: 256
Views: 232200

Re: Worst thing you've seen in a lab

My chemistry teacher from high school used to give a demonstration of acids and bases that would end with him mixing HCl and NaOH then drinking the result. He stopped doing that once he though about what would happen if he messed up the measurements.
Sun Jan 06, 2013 3:57 am UTC
Forum: Science
Topic: Pictures of ancient life
Replies: 9
Views: 2345

Re: Pictures of ancient life

There is some good paleo art on deviantart. Some of the stuff is crap but there are some who go for scientific accuracy. Your best bet is to look for art groups once you can find a few good pics. I've been mostly interested in the feathered dinosaur pics, though so I'm not sure what there is on carb...
Sun Jan 06, 2013 3:50 am UTC
Topic: 1152: "Communion"
Replies: 124
Views: 24032

Re: 1152: "Communion"

Mammalian red blood cells don't contain DNA, so the victim must be either fish, bird or reptilian Red blood cells, true, but those aren't the only cells in blood. Oh god.. OH GOD http://userserve-ak.last.fm/serve/_/15635077/Raptor+Jesus+1372088372_l.jpg raptor jesus is upon us! And someone should r...
Wed Dec 26, 2012 6:44 am UTC
Forum: What If?
Topic: What-If 0021: "Machine Gun Jetpack"
Replies: 93
Views: 46803

Re: What-If 0021: Machine Gun Jetpack

Reminds me of the time I propelled myself down the streets of San Andreas using a tank mortar.
Fri Dec 21, 2012 7:23 am UTC
Topic: 1150: Instagram
Replies: 104
Views: 28341

Re: 1150: Instagram

Quite frankly I'm surprised it isn't an end-of-the-world related strip, given the date.
Mon Dec 17, 2012 10:04 pm UTC
Forum: What If?
Topic: What-If 0023: "Short Answer Section II"
Replies: 80
Views: 21638

Re: What If 23: Short Answer Section II

nitePhyyre wrote:If you wanted to stop a hurricane using explosives, would you want to remove its angular momentum? Shaped (nuclear?) charges. Not just big bomb in the middle?

That sounds interesting, though that could trigger an eyewall replacement cycle.