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by Eebster the Great
Thu May 09, 2019 10:40 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 381
Views: 58887

Re: Science fleeting thoughts

That's not even too unfair a misrepresentation. Feyerabend has some super weird views about pretty much everything and believes science should not be taught in schools, because that gives science an unfair advantage.
by Eebster the Great
Thu May 09, 2019 4:04 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 381
Views: 58887

Re: Science fleeting thoughts

. . . but how? You say that it would, but I don't get how this works at all.
by Eebster the Great
Thu May 09, 2019 3:38 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 381
Views: 58887

Re: Science fleeting thoughts

It's not like time isn't a dimension in classical physics. But I'm also not understanding how you can reproduce the invariance of the speed of light in your model.
by Eebster the Great
Thu May 09, 2019 3:09 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 381
Views: 58887

Re: Science fleeting thoughts

I'm not understanding the difference between the argument of an evolution function and the dimension of time.
by Eebster the Great
Thu May 09, 2019 2:14 pm UTC
Forum: Mathematics
Topic: Why is the cosecant "co"?
Replies: 17
Views: 5933

Re: Why is the cosecant "co"?

Also, jaib means "breast," not "bay." The Latin translation sinus can mean either "breast" or "bay," but it was chosen as a translation of the former. Centuries later, mathematicians plotted the graph of y = sin x on Cartesian coordinates and noticed that it d...
by Eebster the Great
Thu May 09, 2019 7:35 am UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

Is there such a mass? By the Intermediate Value Theorem, yes. How long would it take a moon-sized black hole to evaporate? If that's less than the age of the universe, then no, there is no such mass; anything that started out small enough to have evaporated enough to still be small enough to evapor...
by Eebster the Great
Thu May 09, 2019 4:45 am UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

Primordial black holes can hypothetically have masses much smaller than a star, and some could have already evaporated.
by Eebster the Great
Thu May 09, 2019 3:05 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2146: "Waiting for the But"
Replies: 28
Views: 4757

Re: 2146: "Waiting for the But"

I don't know about cereal cubes, but I do know the proper shape for the cereal container is a cuboid of some sort. Superellipsoidal generic cereals containers are just there for parents to disappoint their children.
by Eebster the Great
Thu May 09, 2019 12:54 am UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

It will take a "long time" by ordinary standards, but for black holes with temperatures that are not already far higher than the CMB, their lifetimes are many orders of magnitude longer than it will take for the universe to cool to such a temperature anyway. So from that perspective, there...
by Eebster the Great
Wed May 08, 2019 10:39 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 381
Views: 58887

Re: Science fleeting thoughts

There are several closely-related issues coming up here: the arrow of time, the flow of time (A/B-theory), time as a dimension, and time's existence. In Conway's Game of Life, time doesn't flow, but it does have an arrow (the rules are not time-symmetric, so the board evolves different forwards and ...
by Eebster the Great
Wed May 08, 2019 9:03 pm UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

The smallest black hole is hypothetically the Planck mass of 22 μg, which has a Schwarzschild radius of twice the Planck length (3.2×10 −35 m) and according to formulas developed for large black holes, should evaporate in about 8.7×10 −40 s. The properties of micro-black holes are not known, but the...
by Eebster the Great
Wed May 08, 2019 8:54 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 381
Views: 58887

Re: Science fleeting thoughts

Okay, then I will happily remain confused. EDIT: Thinking about this further, Conway's game of life does not have a time component. It has a board with a state, and that state follows rules and changes, and time is purely a result of the sequential nature of the system. That is the time dimension. ...
by Eebster the Great
Tue May 07, 2019 8:51 pm UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

So basically, even if you had two black holes magically pinned in place, and tried to zing a photon exactly down the line directly between them, it might go past the center of mass, but it couldn't make it out the other side to infinity. I don't think that's correct. If the black holes are magicall...
by Eebster the Great
Tue May 07, 2019 12:34 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2146: "Waiting for the But"
Replies: 28
Views: 4757

Re: 2146: "Waiting for the But"

But it's milk before cereal/tea/jam on a scone. Is milk before cereal an actual thing? Some people must have very large cereal bowls or very splashy floors. Some flake-form cereals can be predisposed to acts of lactic treachery: you pour the milk on a flake whose geometry sends a portion of the cal...
by Eebster the Great
Tue May 07, 2019 12:30 pm UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

The black holes themselves are in motion and have angular momentum about their barycenter. I don't see why it would be impossible to warp the horizons enough so that they don't meet. The Schwarzschild radius is just a number here.
by Eebster the Great
Tue May 07, 2019 2:23 am UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

I think the event horizons of Kerr black holes are oblate spheroids, or something similar, and the minor radius is smaller than the Schwarzschild radius. This should in principle allow two Kerr black holes that are rotating extremely quickly to pass by each other without their event horizons overlap...
by Eebster the Great
Tue May 07, 2019 12:44 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2146: "Waiting for the But"
Replies: 28
Views: 4757

Re: 2146: "Waiting for the But"

But it's milk before cereal/tea/jam on a scone. Is milk before cereal an actual thing? Some people must have very large cereal bowls or very splashy floors. Some flake-form cereals can be predisposed to acts of lactic treachery: you pour the milk on a flake whose geometry sends a portion of the cal...
by Eebster the Great
Mon May 06, 2019 6:12 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2146: "Waiting for the But"
Replies: 28
Views: 4757

Re: 2146: "Waiting for the But"

The Moomin wrote:But it's milk before cereal/tea/jam on a scone.

Is milk before cereal an actual thing? Some people must have very large cereal bowls or very splashy floors.
by Eebster the Great
Mon May 06, 2019 11:33 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2139: "Email Settings"
Replies: 59
Views: 8668

Re: 2139: "Email Settings"

It's also just too complicated to keep track of the Latin declension. "Genus" is third declension and has genitive singular "generis" and nominative plural "genera." But "genius," which comes from the same root, is second declension and has genitive singular &...
by Eebster the Great
Mon May 06, 2019 8:02 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2139: "Email Settings"
Replies: 59
Views: 8668

Re: 2139: "Email Settings"

"radiuses" and "radii" are both acceptable, but "radiuses" is far more common. Really? I get that "radii" is like 150 times more common than "radiuses" in modern books and used to be even more overwhelmingly preferred. But there are other examples, ...
by Eebster the Great
Sun May 05, 2019 2:21 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 381
Views: 58887

Re: Science fleeting thoughts

But as an actual fleeting thought, how does this work in a universe that is contracting or that will eventually contract? In such a universe: (1) if it is homogeneous at a large enough scale, then at a larger enough scale, there will be a mass contained within a sphere of radius much smaller than it...
by Eebster the Great
Sun May 05, 2019 2:09 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 381
Views: 58887

Re: Science fleeting thoughts

Oh this is terribly embarrassing. The Schwarzsadult radius is of course volume over adjusted length squared times half the logarithm of the girth coefficient.
by Eebster the Great
Sun May 05, 2019 1:44 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 381
Views: 58887

Re: Science fleeting thoughts

What is the Schwarzsadult radius? The Schwarzschild (pronounced something like Shvarts-sheelt, I think) radius of an object is the hypothetical radius of the event horizon of a nonrotating black hole of that mass. So for instance, if the Sun somehow stopped rotating completely and then imploded, wi...
by Eebster the Great
Thu May 02, 2019 8:10 am UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

Ok so what would happen if a black hole made of ice collided with a black hole made of lava (regular black hole)? The temperature of a black hole as seen by the outside observer is determined by hawking radiation, which depends on mass and nothing else. OK I get that, but what if instead of putting...
by Eebster the Great
Wed May 01, 2019 11:16 pm UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

Ok so what would happen if a black hole made of ice collided with a black hole made of lava (regular black hole)? Both black holes would be the same size and ice-made hole's temperature would be -1000 degrees of celsius and normal hole's temperature +1000 degrees of celsius.
by Eebster the Great
Wed May 01, 2019 2:51 am UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

Or the probe could just be microscopic. Not much tidal force across a one micron robot.
by Eebster the Great
Tue Apr 30, 2019 4:20 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2119: Video Orientation
Replies: 51
Views: 11717

Re: 2119: Video Orientation

Three percent of Rottentomatoes reviewers loved it.
by Eebster the Great
Tue Apr 30, 2019 3:09 am UTC
Forum: Mathematics
Topic: Analytic/ asymptotic size of rationals
Replies: 4
Views: 2115

Re: Analytic/ asymptotic size of rationals

It's not just about .61, but ezactly 1/ʒ(2) = 6/π2 (quoting the article), which gives the limit of the cardinality of the set of rationals with numerator and denominator at most x as x approaches infinity of exactly 6x22.
by Eebster the Great
Mon Apr 29, 2019 3:56 pm UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

Is it possible to have a stellar mass black hole inside a supermassive black hole, such that some objects are outside both, some are inside both, and some are inside the supermassive black hole but outside the stellar mass black hole? Obviously they will merge eventually, but before they do . . . A...
by Eebster the Great
Mon Apr 29, 2019 1:51 am UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

You seem to be imagining the event horizon shrinking away from the probe as some of the black hole's gravity is canceled out by the gravity of the other more distant black hole. But I don't think that's actually happens in close approaches of black holes. On the contrary, I think the event horizon t...
by Eebster the Great
Sun Apr 28, 2019 11:55 pm UTC
Forum: Science
Topic: Is it possible to escape from a black hole using another black hole?
Replies: 56
Views: 5831

Re: Is it possible to escape from a black hole using another black hole?

Is it possible to have a stellar mass black hole inside a supermassive black hole, such that some objects are outside both, some are inside both, and some are inside the supermassive black hole but outside the stellar mass black hole? Obviously they will merge eventually, but before they do . . .
by Eebster the Great
Sun Apr 28, 2019 6:49 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0831: "Weather Radar"
Replies: 112
Views: 32122

Re: 0831: "Weather Radar"

Far enough North (or South) and the seasons are "Day" and "Night"... It's more like "just after sunrise" (morning), "just before sunset" (evening), "just after sunset" (dusk), and "just before sunrise" (dawn). You have a sort of year-long ...
by Eebster the Great
Sat Apr 27, 2019 2:36 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0831: "Weather Radar"
Replies: 112
Views: 32122

Re: 0831: "Weather Radar"

The classic seasons for [insert northern latitude place here] are "Almost Winter," "Winter," "Still Winter," and "Construction."
by Eebster the Great
Thu Apr 25, 2019 3:57 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2141: "UI vs UX"
Replies: 17
Views: 3158

Re: 2141: "UI vs UX"

I will note the arc of the final U is long but bends left.
by Eebster the Great
Sun Apr 21, 2019 1:18 am UTC
Forum: Science
Topic: Nitrogen to oxygen
Replies: 11
Views: 2089

Re: Nitrogen to oxygen

What's the Schwarzschild radius of a mushroom? You are obviously missing the smaller picture. I think 20 g is a reasonable guess for a mushroom, which gives a Schwarzschild radius of 3 × 10 -29 m, compared to carbon's covalent radius of 8 × 10 -11 m. But if as per gmal you have lots of mushrooms ha...
by Eebster the Great
Sat Apr 20, 2019 10:24 pm UTC
Forum: Science
Topic: Nitrogen to oxygen
Replies: 11
Views: 2089

Re: Nitrogen to oxygen

I second that it's probably C - transmuting to N, but I disagree that it's stuffed full of neutrons. Neutrons are not distinguished in the cartoon to such an extent as to be countable at all, and the "body" of the atoms needn't consist solely of nucleons any more than its eyes or mouth do,...
by Eebster the Great
Sat Apr 20, 2019 2:55 am UTC
Forum: Science
Topic: How do Maxwell's equations predict the speed of light?
Replies: 4
Views: 1985

Re: How do Maxwell's equations predict the speed of light?

I was coming from the perspective that the invariance of μ and ε had already been established and the invariance of c was thus what we wished to establish (which follows from c = (με) -½ , as you said). But if we wanted to go the other way around, taking the invariance of c as established, I can't s...
by Eebster the Great
Thu Apr 18, 2019 9:29 pm UTC
Forum: Mathematics
Topic: What do Average Mathmaticians Do?
Replies: 16
Views: 2910

Re: What do Average Mathmaticians Do?

I simplified the complicated and multifaceted process of how to secure funding for research because my question is not about that. My point is that because scientific research is inherently different from mathematical research, I do not understand how mathematicians who are not like geniuses like G...
by Eebster the Great
Thu Apr 18, 2019 1:05 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 381
Views: 58887

Re: Science fleeting thoughts

There is some room between keeping only one significant figure at each step and keeping 17.

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