Search found 127 matches

by Himself
Sun Nov 05, 2017 7:38 am UTC
Forum: Fictional Science
Topic: Most realistic magic system and areas for improvement
Replies: 7
Views: 2403

Re: Most realistic magic system and areas for improvement

I'd say a good candidate is what Patrick Rothfuss came up with for the Kingkiller series with Sympathy. It basically accounts for a decent amount of physics with much of it based on applying the right amount of energy from the right source. A close second would probably be the pymary in the webcomic...
by Himself
Sun Nov 05, 2017 12:39 am UTC
Forum: Science
Topic: Uranium more Common than Zinc
Replies: 10
Views: 1442

Re: Uranium more Common than Zinc

Yes, solubility is a key thing. Uranium will form compounds and go into rock more readily than gold. Since it doesn't fit well in many crystal lattices it is also one of the last components to crystallize in a cooling magma. As a result it tends to get concentrated in continental crust.
by Himself
Tue Sep 19, 2017 4:37 pm UTC
Forum: Science
Topic: Popping a Balloon
Replies: 2
Views: 680

Popping a Balloon

I've had this question in my head for some years now. Back when I was in high school a guy in my homeroom brought in a balloon for his birthday. It was clearly overinflated. A friend of his started lightly punching the balloon. After we had settled down and were listening to the day's announcements ...
by Himself
Fri Sep 08, 2017 8:14 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1887: "Two Down, One to Go"
Replies: 20
Views: 2159

Re: 1887: "Two Down, One to Go"

Well, here's to 2024 for the eclipse.
by Himself
Wed Aug 23, 2017 2:24 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1880: "Eclipse Review"
Replies: 51
Views: 4432

Re: 1880: "Eclipse Review"

I wouldn't expect there'd by much to see with a supernova. It would be so bright that you wouldn't see what was happening.
by Himself
Mon Jul 10, 2017 10:41 pm UTC
Forum: What If?
Topic: FEEDBACK: what if ? GLOBAL WINDSTORM
Replies: 4
Views: 3537

Re: FEEDBACK: what if ? GLOBAL WINDSTORM

I'd we go with the idea of all the gasses keep moving while all solids and liquids stop presents some interesting details to look at. Consider the air inside people's lungs or inside buildings. In the latter case it might not make much difference except in underground structures and caves.
by Himself
Tue Jun 20, 2017 10:42 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1852: "Election Map"
Replies: 30
Views: 4206

Re: 1852: "Election Map"

The interpretation depends on the position of the observation point. There may very well be some sort of convergence or divergence occurring along a SW-NE axis.
by Himself
Thu May 25, 2017 10:35 pm UTC
Forum: What If?
Topic: What-If 0004: "A Mole of Moles"
Replies: 89
Views: 65214

Re: What-If 0004: "A Mole of Moles"

I am resurrecting this thread to pose a new question: Would the mole moon convect? If we go with purely compressional heating then the temperature profile (molotherm?) would depend solely on pressure. Any parcel of meat moved up or down would change temperature at the same rate as the ambient adiaba...
by Himself
Wed May 10, 2017 10:46 pm UTC
Forum: Science
Topic: Storing Nuclear Waste on the Moon
Replies: 57
Views: 8178

Re: Storing Nuclear Waste on the Moon

The ocean trench idea is one to think about. Depending on the subduction zone and how deep we bury the waste, it may not even end up in the mantle, but would rather be scraped off the subducting plate along with the upper sedimentary layers and become part of the accretionary prism. In that case the...
by Himself
Fri Apr 21, 2017 1:57 pm UTC
Forum: Science
Topic: Safe electrolytes for electrolysis.
Replies: 14
Views: 2304

Re: Safe electrolytes for electrolysis.

I'll try the magnesium hydroxide and see how that works.
by Himself
Thu Apr 20, 2017 2:57 pm UTC
Forum: Science
Topic: Safe electrolytes for electrolysis.
Replies: 14
Views: 2304

Re: Safe electrolytes for electrolysis.

Even given the low solubility of magnesium hydroxide? Though I see the appeal of limiting what anions are present.
by Himself
Thu Apr 20, 2017 1:42 pm UTC
Forum: Science
Topic: Safe electrolytes for electrolysis.
Replies: 14
Views: 2304

Re: Safe electrolytes for electrolysis.

I wasn't sure about SO 2 . I had read somewhere that sulfuric acid was commonly made by oxidizing SO 2 to SO 3 , so I guess I was concerned about that reversing. I'm not concerned about magnesium hydroxide considering it is used as an over the counter antacid. I was even considering using it as a bu...
by Himself
Wed Apr 19, 2017 5:20 pm UTC
Forum: Science
Topic: Safe electrolytes for electrolysis.
Replies: 14
Views: 2304

Re: Safe electrolytes for electrolysis.

I expect the CO2 would form around the anode.
2H2O --> O2 + 4H+ + 4e-
So the pH around the anode would drop.

What of magnesium sulfate, then? It could release SO2 or form small amounts of sulfuric acid or magnesium bisulfate I imagine.
by Himself
Wed Apr 19, 2017 1:33 pm UTC
Forum: Science
Topic: Safe electrolytes for electrolysis.
Replies: 14
Views: 2304

Re: Safe electrolytes for electrolysis.

I was thinking of wiring up parallel batteries anyway. I had thought of using sodium bicarbonate as well, but I am wasn't sure if I might get adverse reactions from the anion such as reduction to CO or something like that, though that might not be a problem if the area is well ventilated.
by Himself
Wed Apr 19, 2017 3:42 am UTC
Forum: Science
Topic: Safe electrolytes for electrolysis.
Replies: 14
Views: 2304

Re: Safe electrolytes for electrolysis.

So would common batteries in distilled provide enough voltage for distilled water without being painstakingly slow?
by Himself
Tue Apr 18, 2017 1:19 am UTC
Forum: Science
Topic: Safe electrolytes for electrolysis.
Replies: 14
Views: 2304

Safe electrolytes for electrolysis.

I am interested in producing hydrogen gas but I would like to minimize the hazardous materials I would have to deal with. My main concern is what electrolyte I could use without having to worry about hazardous byproducts. Sodium chloride is out because, as I understand, it would likely yield some ch...
by Himself
Mon Jul 04, 2016 1:58 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1702: "Home Itch Remedies"
Replies: 33
Views: 4860

Re: Home Itch Remedies

What of scalding hot water?
by Himself
Wed Jun 29, 2016 7:20 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1700: "New Bug"
Replies: 30
Views: 5926

Re: 1700: "New Bug"

Yeah though given the theme of late it would be interesting if this guy's inept programming would lead to insects infesting his computer.
by Himself
Wed Jun 29, 2016 1:03 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1700: "New Bug"
Replies: 30
Views: 5926

Re: 1700: "New Bug"

For a moment I thought the punchline would be that the bug was an actual insect.
by Himself
Mon May 23, 2016 9:35 pm UTC
Forum: What If?
Topic: What-If 0150: "Tatooine Rainbow"
Replies: 52
Views: 25648

Re: What-If 0150: Tatooine Rainbow

Intrabinary seems to make sense to me as well since such a planet would be within the binary system and would be dominated by the one star it does orbit.
by Himself
Mon May 16, 2016 10:36 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1681: "Laser Products"
Replies: 30
Views: 4833

Re: 1681: "Laser Products"

Isn't laser jet removal already in development?
by Himself
Fri May 13, 2016 3:12 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1680: "Black Hole"
Replies: 31
Views: 5448

Re: 1680: "Black Hole"

I'd be worried about the micromicroquasar that would result from placing it in Earth's atmosphere.
by Himself
Wed May 04, 2016 10:55 pm UTC
Forum: Science
Topic: Does potential energy have mass?
Replies: 78
Views: 12703

Re: Does potential energy have mass?

Sorry, I had meant to say increases, not diminishes.
by Himself
Wed May 04, 2016 10:04 pm UTC
Forum: Science
Topic: Does potential energy have mass?
Replies: 78
Views: 12703

Re: Does potential energy have mass?

I was using the formula U=-gMm/r, directly, not any logarithm. Using a 1 kg mass and a 4 million solar mass black hole I get: ~-2*10^6 J at 25 k light years ~-6*10^10 J at 1 light year ~-4*10^15 J at 1 AU So the potential energy diminishes rapidly with increasing distance at close proximity and more...
by Himself
Wed May 04, 2016 12:29 am UTC
Forum: Science
Topic: Does potential energy have mass?
Replies: 78
Views: 12703

Re: Does potential energy have mass?

I was under the impression that the potential energy increased with distance with U=-GMm/r simply giving negative values. I understand, for example, that the majority of the ~25k light years between us and Sagittarius A* accounts for a very small portion of our potential energy relative to it, but w...
by Himself
Mon May 02, 2016 10:08 pm UTC
Forum: Science
Topic: Does potential energy have mass?
Replies: 78
Views: 12703

Re: Does potential energy have mass?

So here's where I'm confused. I have read in a few places that the energy radiated by a quasar is equivalent to a significant portion of the mass of the infalling material. All of that must have originally been gravitational potential energy. But that material would still have gravitational potentia...
by Himself
Mon May 02, 2016 1:11 am UTC
Forum: Science
Topic: Bad science jokes!
Replies: 100
Views: 28641

Re: Bad science jokes!

My friend showed me his granite counter top. It was really gneiss.
by Himself
Sun May 01, 2016 2:34 am UTC
Forum: Science
Topic: Does potential energy have mass?
Replies: 78
Views: 12703

Re: Does potential energy have mass?

The scenario of the rocks falling inward is still relevant to reality, though, right? The radiation from quasars ultimately comes from gravitational potential energy, doesn't it?
by Himself
Sun Mar 20, 2016 2:24 am UTC
Forum: Site/Forum issues
Topic: Let's Point and Laugh at Those Who Don't Read Announcements
Replies: 2
Views: 3277

Let's Point and Laugh at Those Who Don't Read Announcements

I have not been on the forum for a while and while going over one post I noticed some strange text substitutions. Among other things "What if" is displayed as as "Remember when" and seemingly random words are rendered as "six." It doesn't seem to affect other sites, so ...
by Himself
Sun Jul 05, 2015 5:26 am UTC
Forum: Science
Topic: Challenge: Create a living machine
Replies: 15
Views: 3575

Re: Challenge: Create a living machine

I guess I'm resurrecting this, but would the Replicators from Stargate count?
by Himself
Wed Apr 29, 2015 3:08 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1518: "Typical Morning Routine"
Replies: 126
Views: 14923

Re: 1518: "Typical Morning Routine"

I see a surprising amount of people with floor vents in this thread. They are actually rare in construction for obvious reasons. Given the people who have mentioned they did not know there were homes with floor vents, it seems this thread would naturally attract such comments. Though I think you're...
by Himself
Wed Apr 15, 2015 4:33 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1512:"Horoscopes"
Replies: 43
Views: 6983

Re: 1512:"Horoscopes"

If you're born 9 months before you're conceived, do you age backwards?
by Himself
Wed Feb 25, 2015 5:29 pm UTC
Forum: Science
Topic: Living in a earth-like moon orbiting a planet
Replies: 58
Views: 22380

Re: Living in a earth-like moon orbiting a planet

Another thing I've been thinking of in regard to atmosphere is the atmospheric circulation of Beta. Since we are talking about an object with the same mass, radius, and rotation as Earth, it seems likely that it would have similar wind belts. In other words, the atmosphere would be largely dominated...
by Himself
Wed Feb 25, 2015 6:06 am UTC
Forum: Science
Topic: Living in a earth-like moon orbiting a planet
Replies: 58
Views: 22380

Re: Living in a earth-like moon orbiting a planet

As far as the appearance of the eclipse goes, I suspect the darkness might not even be complete, since we'd get refraction/scattering through Alpha's atmosphere.
by Himself
Tue Feb 24, 2015 1:25 am UTC
Forum: Science
Topic: Teleporting inside a wall
Replies: 16
Views: 4044

Re: Teleporting inside a wall

Not sure if my back-of the envelope calculations were right, but it seems energy due to electrostatic nuclei would actually be quite small. On the order of 0.1J if we consider nuclei that end up within 10 pm of each other. Someone may want to check that, though.
by Himself
Fri Feb 20, 2015 9:03 pm UTC
Forum: Science
Topic: Teleporting inside a wall
Replies: 16
Views: 4044

Re: Teleporting inside a wall

What is the difference between teleporting someone into a wall and teleporting them into air? There is still a random distribution of atoms, chances are good there is overlap in either case. The difference of a few atoms overlapping vs billions doesn't seem to matter when we're talking nuclear fusi...
by Himself
Fri Feb 20, 2015 7:25 pm UTC
Forum: Science
Topic: Teleporting inside a wall
Replies: 16
Views: 4044

Teleporting inside a wall

For a bit of time now the idea has been bouncing around of what would happen if someone were to teleport inside a wall. Let's ignore how the teleportation would take place. I've only seen or read of this happening in a couple scifi/fantasy scenarios, which have either result in some unfortunate pers...
by Himself
Sat Nov 22, 2014 6:07 am UTC
Forum: What If?
Topic: What-If 0120: "Alternate Universe What Ifs"
Replies: 94
Views: 34785

Re: What-If 0120: "Alternate Universe What Ifs"

Regarding scuba divining human blood. Randall talks about having to account for differences in density, but what about differences in viscosity? Could that affect anything?
Getting a bit of a Cave Johnson vibe here.
by Himself
Mon Nov 03, 2014 8:36 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1442: "Chemistry"
Replies: 63
Views: 15585

Re: 1442: "Chemistry"

Under sufficient pressure, though, couldn't oxygen link together with itself into chains? We have to consider the implications of elements with closed loops.
by Himself
Wed Oct 29, 2014 9:24 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1440: Geese
Replies: 52
Views: 9486

Re: 1440: Geese

Jumping to that topic again: are the objects, that are visible to the naked eye in the night sky, only stars (within a few hundred lightyears) or are there also vast galaxies (millions of lightyears away, like the image above reads, but not actually a star) that show up as a bright dot? Galaxies lo...

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