Search found 3154 matches

by Eebster the Great
Mon Jan 14, 2019 7:17 pm UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 408
Views: 130751

Re: Math: Fleeting Thoughts

A majority of US states actually also prohibit first cousin marriage. North Carolina has the odd distinction of being the only state to allow single first cousin marriages but not double first cousin marriages. Sex is more broadly legal though.
by Eebster the Great
Mon Jan 14, 2019 6:00 pm UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 408
Views: 130751

Re: Math: Fleeting Thoughts

If someone's son is their brother, they reproduced with their mother or father. Which, in addition to having a much higher rate of defects, is also fucked up in loads of other ways that often wouldn't apply to (even double first) cousins. Yeah, the kid's parent is also his grandparent. It's fucked ...
by Eebster the Great
Mon Jan 14, 2019 4:35 pm UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 408
Views: 130751

Re: Math: Fleeting Thoughts

One's son shouldn't be one's sibling... The moral injunctions of Exodus can really go take a hike. 2019, brah. Since this is the math forum, it's worth mentioning that the detrimental genetic effects from such a union are statistically significant but practically very small, in contrast to popular ...
by Eebster the Great
Mon Jan 14, 2019 10:18 am UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2904
Views: 666034

Re: Miscellaneous Science Questions

It also makes me wonder what is the defining distinction between carnivores and omnivores if even a "hypercarnivore" can get nearly a third of its energy from plants. At a guess, an omnivore can survive purely on a herbivore diet, but a carnivore must have meat. I believe that is a facult...
by Eebster the Great
Mon Jan 14, 2019 3:42 am UTC
Forum: Mathematics
Topic: Calculate Mass from Time Dilation and Radius
Replies: 4
Views: 135

Re: Calculate Mass from Time Dilation and Radius

So you are just doing 1 - 1/γ? I don't understand your objective. Anyway, the range is 0-1, not 0.1-1. You cannot calculate the mass of an object just by its radius and the gravitational field on the surface unless you know some additional things about it, like that its density is distributed with s...
by Eebster the Great
Sun Jan 13, 2019 6:06 am UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 408
Views: 130751

Re: Math: Fleeting Thoughts

I think it is well accepted that 1% = 0.01. The question is the meaning of angle measure. The terse Complex Analysis text I just conveniently lost defined the radian measure according to the Taylor series that could most conveniently fit the desired properties. Clearly one measure is way more conven...
by Eebster the Great
Sun Jan 13, 2019 4:39 am UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 147
Views: 24861

Re: Science fleeting thoughts

Exoplanar mining.png The negative 270 degree temperature might be a bummer. Where are you getting that number from? What I notice is that (1) the pits seem to be of different depths, and this might mean surface air pressures are significantly different, and (2) the "ice" must be incredibl...
by Eebster the Great
Sat Jan 12, 2019 6:27 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 147
Views: 24861

Re: Science fleeting thoughts

Sableagle wrote:Exoplanar mining.png

The negative 270 degree temperature might be a bummer.
by Eebster the Great
Sat Jan 12, 2019 6:38 am UTC
Forum: Science
Topic: Copper in vacuum thermos
Replies: 10
Views: 2704

Re: Copper in vacuum thermos

That actually makes a lot of sense. I mean, for a 14 oz mug with a simple plastic top, this sort of thing is probably mostly just marketing like you said, but for a srs thermos, maybe it would matter somewhat. Just in case you are the kind of guy to pack your soup a full day before you intend to eat...
by Eebster the Great
Sat Jan 12, 2019 6:28 am UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 147
Views: 24861

Re: Science fleeting thoughts

Sableagle's G differs from the CODATA value of 6.674 08(31) × 10 -11 m 3 kg -1 s -2 in the third decimal place. But it doesn't matter because the precision was not the point. Still, that is an astonishingly precise measurement. The sun's μ is even more precisely known, at 1.327 124 400 18(9) × 10 20...
by Eebster the Great
Sat Jan 12, 2019 6:14 am UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2904
Views: 666034

Re: Miscellaneous Science Questions

The Wikipedia article says "A hypercarnivore is an animal which has a diet that is more than 70% meat, with the balance consisting of non-animal foods [...]." So clearly it is using "meat" to refer to any animal matter, not just skeletal muscle. The term "hypercarnivore"...
by Eebster the Great
Fri Jan 11, 2019 3:14 pm UTC
Forum: Mathematics
Topic: Favorite Mathematical Equation
Replies: 87
Views: 11427

Re: Favorite Mathematical Equation

Therefore the solution set to the polynomial equation x2 - x = 0 is x ∈ {0,1} = 2.

x∈2. It just sounds wrong.
by Eebster the Great
Thu Jan 10, 2019 7:22 pm UTC
Forum: Science
Topic: quarkcosh1's miscellaneous science posts
Replies: 73
Views: 5174

Re: quarkcosh1's miscellaneous science posts

What is interesting is the possibility that, starting N digits down Pi and thence every Mth digit, you might find just 2,2,2,2… forever. For arbitrary, possibly transfinite , N and M, that mesh nicely into every other sequence being looked for. Every digit of a real number is at a finite position.
by Eebster the Great
Thu Jan 10, 2019 7:12 pm UTC
Forum: Science
Topic: What is my Exact Mailing Address?
Replies: 11
Views: 715

Re: What is my Exact Mailing Address?

It doesn't say the term is archaic. It says that generally in English, we now call North and South America distinct continents, while "The Americas" collectively refers to both, and "America" most often refers to the U.S. What is archaic is referring to The Americas / the America...
by Eebster the Great
Thu Jan 10, 2019 12:29 pm UTC
Forum: Science
Topic: Stars in background of deep-sky photos are in foreground
Replies: 21
Views: 641

Re: Stars in background of deep-sky photos are in foreground

ucim wrote:You mean, by using alternative facts? :)

Yes. Also, if the Earth were an infinite flat plane, the gravitational field would not vary with altitude.
by Eebster the Great
Thu Jan 10, 2019 4:09 am UTC
Forum: Science
Topic: Stars in background of deep-sky photos are in foreground
Replies: 21
Views: 641

Re: Stars in background of deep-sky photos are in foreground

I think his statement would be correct though if the distance to the moon were not so much greater than its diameter.
by Eebster the Great
Wed Jan 09, 2019 4:56 pm UTC
Forum: Science
Topic: quarkcosh1's miscellaneous science posts
Replies: 73
Views: 5174

Re: quarkcosh1's miscellaneous science posts

Again, trying formulas at random because you feel like some of the special functions could be connected to the topic in some way is not science . The actual way these formulas are discovered is by creating mathematical models that are meaningful on their own and then finding that the model's predict...
by Eebster the Great
Tue Jan 08, 2019 8:47 pm UTC
Forum: Science
Topic: Stars in background of deep-sky photos are in foreground
Replies: 21
Views: 641

Re: Stars in background of deep-sky photos are in foreground

Yeah, I feel like using a telescope to read a magazine might be overkill.
by Eebster the Great
Thu Jan 03, 2019 2:35 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1732: "Earth Temperature Timeline"
Replies: 536
Views: 97573

Re: 1732: "Earth Temperature Timeline"

Great info! Do we know, out of these 4 contributors to global warming, what weight do each of them carry? The focus in the general public has been on carbon dioxide emissions. Some of these are factors are getting multiplied together, so you can't describe one as "mattering more" the way ...
by Eebster the Great
Mon Dec 31, 2018 7:09 pm UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2904
Views: 666034

Re: Miscellaneous Science Questions

I'm not sure there is any consistent way to have a universe with a definite start in the infinite past. But if there is, its age would still just be "countably infinite" and the current year could not be consistently assigned any ordinal. If it were, either it would be a limit ordinal, in ...
by Eebster the Great
Mon Dec 31, 2018 9:18 am UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2904
Views: 666034

Re: Miscellaneous Science Questions

I think actual, observed physics rules this out, but nothing logically prevents this from being the year "omega + 6000", where omega is the first transfinite ordinal. For the other view, I once had my freshman philosophy professor make the claim that tomandlu asked about. No, I do not thi...
by Eebster the Great
Fri Dec 28, 2018 9:58 pm UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2904
Views: 666034

Re: Miscellaneous Science Questions

I think tomandlu is imagining starting at some particular point and then reaching an infinite future, which does seem impossible, since infinity is unreachable. It's certainly true that the universe cannot have started "infinity years ago," because if the universe is infinitely old, it had...
by Eebster the Great
Wed Dec 26, 2018 12:43 am UTC
Forum: Science
Topic: Childhood (not so) crackpot theories
Replies: 435
Views: 54210

Re: Childhood (not so) crackpot theories

It's hard for me to visualize a fly "thinking." I know that they do, in the sense that they make decisions, learn, remember, etc., but their lack of any true brain makes me suspect their cognitive processes are very different from mine. But I would be willing to believe that for a good def...
by Eebster the Great
Sun Dec 23, 2018 12:19 am UTC
Forum: Mathematics
Topic: Favorite Mathematical Equation
Replies: 87
Views: 11427

Re: Favorite Mathematical Equation

doogly wrote:
Carmeister wrote:I don't think that's an equation.

It's equal to something, just left as an exercise to the reader. Which is everyone's favorite, really.

WolframAlpha gives a solution in the form of the upper incomplete gamma function, which seems a bit like cheating.
by Eebster the Great
Sat Dec 22, 2018 8:29 am UTC
Forum: Science
Topic: quarkcosh1's miscellaneous science posts
Replies: 73
Views: 5174

Re: quarkcosh1's miscellaneous science posts

What are the morphisms in this 2-category? I don't get it at all. There is some actual physical reason the dimensionless constants have the values they do (though there might not be a good reason), but we can't figure that reason out just by looking at random lists of mathematical expressions until ...
by Eebster the Great
Thu Dec 20, 2018 11:55 am UTC
Forum: Science
Topic: quarkcosh1's miscellaneous science posts
Replies: 73
Views: 5174

Re: The fine structure constant and the quark mass ratios derived from the j invariant

Doing a bunch of random, unmotivated calculations and attempting to spot similar numbers by eye is not a derivation. It's not even really numerology. It's not even not even wrong.
by Eebster the Great
Thu Dec 20, 2018 11:54 am UTC
Forum: Science
Topic: What is my Exact Mailing Address?
Replies: 11
Views: 715

Re: What is my Exact Mailing Address?

You also should give a time range within which you would like the package to be delivered. For instance, it will do no good to deliver it in ten billion years.
by Eebster the Great
Wed Dec 19, 2018 12:34 pm UTC
Forum: Science
Topic: Biology: Wolves vs. Humans
Replies: 45
Views: 2384

Re: Biology: Wolves vs. Humans

The outer edges of the town naturally spawn young, incompetent goat-herders. So why did it take so long for the AI to learn to camp the ones near wolf spawns?
by Eebster the Great
Sun Dec 16, 2018 7:32 pm UTC
Forum: Science
Topic: Biology: Wolves vs. Humans
Replies: 45
Views: 2384

Re: Biology: Wolves vs. Humans

The difference is that the man did not fight the wolf, in the sense that he did not fight at all. He simply tried to save his arm. There is a difference between someone trying to save themself while fending off a wolf and someone trying to kill a wolf. Citing that attack is like citing a massacre to...
by Eebster the Great
Sat Dec 15, 2018 11:16 pm UTC
Forum: Science
Topic: Biology: Wolves vs. Humans
Replies: 45
Views: 2384

Re: Biology: Wolves vs. Humans

What exactly are you proposing I look up to support my claim that an inexperienced person can stab things in the back with a makeshift spear? Is there like a video out there of people doing it? Should I go and make my own spear and try it? So far, you have looked something up, a story of a person be...
by Eebster the Great
Sat Dec 15, 2018 3:57 am UTC
Forum: Science
Topic: Biology: Wolves vs. Humans
Replies: 45
Views: 2384

Re: Biology: Wolves vs. Humans

Well, stabbing things with spears is again the main way humans have hunted for hundreds of thousands of years and also the main way they fought each other. You seem to be suggesting that stabbing things in the back, famously the easiest way to kill people by surprise, is not the easiest way to kill ...
by Eebster the Great
Sat Dec 15, 2018 3:09 am UTC
Forum: Science
Topic: Biology: Wolves vs. Humans
Replies: 45
Views: 2384

Re: Biology: Wolves vs. Humans

Also because she had a rope. Well, if the wolf isn't aware of your presence, you can just fashion a makeshift spear and impale it. You said catch it unaware, not "have enough time to fashion a lethal weapon using no tools and to become skilled enough with that weapon to incapacitate a large pr...
by Eebster the Great
Fri Dec 14, 2018 7:27 am UTC
Forum: Science
Topic: Biology: Wolves vs. Humans
Replies: 45
Views: 2384

Re: Biology: Wolves vs. Humans

Well, if the wolf isn't aware of your presence, you can just fashion a makeshift spear and impale it. But if we are assuming no weapons, it will be harder. Even then, attacking a wolf from behind gives you a much, much better shot than from the front. The story you quoted points out that you can lit...
by Eebster the Great
Fri Dec 14, 2018 7:19 am UTC
Forum: Science
Topic: disproof of boltzman brain?
Replies: 52
Views: 4202

Re: disproof of boltzman brain?

Quizatzhaderac wrote:Each sub section (taken desperately) has a chance of having less than maximal entropy.

What about the stoic subsections that know no desperation?
by Eebster the Great
Thu Dec 13, 2018 11:21 pm UTC
Forum: Science
Topic: Biology: Wolves vs. Humans
Replies: 45
Views: 2384

Re: Biology: Wolves vs. Humans

If the human is caught unaware, of course he'll be at a disadvantage, but if the wolf is caught unaware, it won't even be a fight, so that doesn't seem like the fairest comparison.
by Eebster the Great
Wed Dec 12, 2018 9:38 pm UTC
Forum: Science
Topic: How to calculate the surface tension between water and pure oxygen gas
Replies: 5
Views: 1699

Re: How to calculate the surface tension between water and pure oxygen gas

Surface strain is the imperativeness, or work, required to grow the surface region of a liquid due to intermolecular forces. Since these intermolecular forces vary dependent upon the possibility of the liquid (e.g. water versus fuel) or solutes in the liquid (e.g. surfactants like chemical), each c...
by Eebster the Great
Wed Dec 12, 2018 4:12 am UTC
Forum: Science
Topic: Building a chair out of glue
Replies: 6
Views: 516

Building a chair out of glue

It is a surprising but well-known fact that modern wood glue is much stronger than wood. When I first learned this as a little kid I was both fascinated and suspicious: how could the fastener be stronger than the main construction material? Why not just build everything out of glue? That's obviously...
by Eebster the Great
Tue Dec 11, 2018 9:05 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 147
Views: 24861

Re: Science fleeting thoughts

The whole point of this discussion is that the SI units have been redefined. The mole is now defined by SI as follows: The mole, symbol mol, is the SI unit of amount of substance. One mole contains exactly 6.022 140 76 × 10 23 elementary entities. This number is the fixed numerical value of the Avog...
by Eebster the Great
Tue Dec 11, 2018 8:10 am UTC
Forum: Language/Linguistics
Topic: Moderatores Populusque XKCDi [Latin]
Replies: 167
Views: 66799

Re: Moderatores Populusque XKCDi [Latin]

Yeah, "disciplina" is first declension, and "per" takes the accusative, so it's definitely "per disciplinam." The possessive adjective "meus/-a/-um" has to agree with the noun it is modifying ("discliplinam"), so it also needs the feminine accusative...
by Eebster the Great
Mon Dec 10, 2018 9:05 pm UTC
Forum: Science
Topic: Biology: Wolves vs. Humans
Replies: 45
Views: 2384

Re: Biology: Wolves vs. Humans

Not really. A dog's neck is not nearly as strong as your leg. And I know if they can plant all their feet they can use other muscles too, but in practice, the human is going to win. Like, have you ever played tug of war with a large dog to a decision? Most people keep playing until they get bored an...

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