Search found 2392 matches

by Eebster the Great
Wed Mar 29, 2017 12:02 am UTC
Forum: Science
Topic: RELATIVITY QUESTIONS! (and other common queries)
Replies: 2815
Views: 492841

Re: RELATIVITY QUESTIONS! (and other common queries)

doogly wrote:Whether it's gamma or lambda is relative to your orientation in the plane.

This. In my reference frame I wrote a γ, but it Terrell-rotated to λ.
by Eebster the Great
Tue Mar 28, 2017 6:09 pm UTC
Forum: Science
Topic: RELATIVITY QUESTIONS! (and other common queries)
Replies: 2815
Views: 492841

Re: RELATIVITY QUESTIONS! (and other common queries)

The factor is called λ (lambda) and is equal to (1- v ² / c ² ) -½ , where v is the speed and c is the speed of light in a vacuum. So for instance, if the moving twin has a speed of v = 4 / 5 c = 0.8 c , then λ = 5 / 3 ≈ 1.67. In that case, the song which seems 5 minutes long to the twin on the rock...
by Eebster the Great
Tue Mar 28, 2017 9:56 am UTC
Forum: Science
Topic: Smallest animal
Replies: 5
Views: 2133

Re: Smallest animal

If it's poor form to bump extremely old threads, a mod can just fork this to a new one. At some point the Wikipedia article on Stygotantulus was updated to reference this article about newly discovered species of crustaceans in the Tantulacus genus, with adult Tantulacus dieteri apparently only 85 μ...
by Eebster the Great
Tue Mar 28, 2017 6:29 am UTC
Forum: Science
Topic: Storing Nuclear Waste on the Moon
Replies: 29
Views: 1352

Re: Storing Nuclear Waste on the Moon

To everyone who suggested burying the waste somewhere: 20% of the worlds fresh water is in the Great Lakes basin*, 10% of the U.S. population depends on these lakes for fresh water*, and 84.87 million people live in a U.S. state of Canadian providence bordering the Great Lakes**. There are currentl...
by Eebster the Great
Mon Mar 27, 2017 4:35 am UTC
Forum: Science
Topic: Toothbrush, glasses, and clock
Replies: 15
Views: 352

Re: Toothbrush, glasses, and clock

I've observed the same thing. It is extremely pronounced for certain LCD clocks. It can actually happen even when my glasses are off, but it is an order of magnitude less significant. I think the glasses are relevant because the comparatively subtle vibration of my face makes my glasses move a longe...
by Eebster the Great
Sun Mar 26, 2017 6:25 pm UTC
Forum: Science
Topic: Storing Nuclear Waste on the Moon
Replies: 29
Views: 1352

Re: Storing Nuclear Waste on the Moon

It still seems like an inferior solution to simply burying the waste in a mountain. Apparently that is also politically difficult.
by Eebster the Great
Fri Mar 24, 2017 5:16 pm UTC
Forum: Science
Topic: Is All Evidence Statistical?
Replies: 21
Views: 469

Re: Is All Evidence Statistical?

Actually, Popper alleged that corroborating a theory by failing to falsify it did not increase the probability that it was true. He was not after truth. He was just after effective theories. The reason was that the inductive validation model used by positivists relies on the fallacy of affirming the...
by Eebster the Great
Fri Mar 24, 2017 3:20 am UTC
Forum: Science
Topic: Is All Evidence Statistical?
Replies: 21
Views: 469

Re: Is All Evidence Statistical?

The reference I heard was basically equivalent. It's hard to draw a bright line between hot and cold weather, but we can still all agree that 0 C is cold and 40 C is hot. It's useful for lots of cases. For instance, there was no "first human," even though there are humans now, there was a ...
by Eebster the Great
Thu Mar 23, 2017 6:02 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 233
Views: 10202

Re: Science-based what-if questions

That would effectively be the same as a transplant. Ignoring the problems getting the two circulatory systems to function together you'd run into tissue rejection. It's also hard to get blood types that match up exactly - you've got all the random ones like Kell and Duffy that start being a problem...
by Eebster the Great
Mon Mar 20, 2017 2:24 am UTC
Forum: Science
Topic: The Reverse of how colors work: how would it look?
Replies: 5
Views: 353

Re: The Reverse of how colors work: how would it look?

The "red object" in your drawing looks magenta to me.
by Eebster the Great
Fri Mar 17, 2017 1:45 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 233
Views: 10202

Re: Science-based what-if questions

Your description of something heavy hitting a stick and driving it into the ground without breaking it sounds almost exactly like a description of an actual pile driver.
by Eebster the Great
Fri Mar 17, 2017 1:35 pm UTC
Forum: Science
Topic: Eternalism. Does it allow free will?
Replies: 16
Views: 403

Re: Eternalism. Does it allow free will?

Well there is nothing wrong with tensed verbs, but A-series descriptions are different from the "A-theory of time." Wikipedia does have an article on the B-theory , wherein it attempts to distinguish between the A-theory and presentism: The labels, A-theory and B-theory, are derived from t...
by Eebster the Great
Thu Mar 16, 2017 10:16 pm UTC
Forum: Language/Linguistics
Topic: Miscellaneous language questions
Replies: 243
Views: 14147

Re: Miscellaneous language questions

The fact that salvage lots (or wrecking yards, scrapyards, etc.) are called "junkyards" in the U.S. suggests that the use of "junk" is frequently used to refer to things that may have some value. I use "junk" in the same way. I also agree that there is a common hyperbol...
by Eebster the Great
Thu Mar 16, 2017 8:00 pm UTC
Forum: Science
Topic: Free Will
Replies: 55
Views: 1375

Re: Free Will

I'm surprised nobody has brought up the term "compatibilism" yet. I think this is basically what dougly is getting at (and yes, the Sean Carroll article he linked is very good). Essentially, if we view free will as an emergent (apparent) phenomenon rather than a fundamental property of the...
by Eebster the Great
Thu Mar 16, 2017 5:01 pm UTC
Forum: Science
Topic: Free Will
Replies: 55
Views: 1375

Re: Free Will

It's worth mentioning that quantum randomness is probably not going to be a particularly significant effect in the macro-level interactions that happen in the brain. It's too big, there's too many particles, and it's too hot. Unless you are Roger Penrose. His brain is in a constant quantum superpos...
by Eebster the Great
Thu Mar 16, 2017 5:00 pm UTC
Forum: Science
Topic: Eternalism. Does it allow free will?
Replies: 16
Views: 403

Re: Eternalism. Does it allow free will?

Isn't "presentism" as you've described it just the A-theory of time, and therefore inconsistent with Einstein's special theory of relativity?
by Eebster the Great
Mon Mar 13, 2017 3:46 pm UTC
Forum: Language/Linguistics
Topic: Miscellaneous language questions
Replies: 243
Views: 14147

Re: Miscellaneous language questions

You left out the term wastepaper basket.
by Eebster the Great
Sun Mar 12, 2017 10:32 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 233
Views: 10202

Re: Space air

It does matter how fast you are travelling. If you are moving fast enough relative to the interstellar medium, drag can be significant. Needless to say, in interstellar space, "fast enough" is pretty fast. The densest regions you have any reasonable probability of flying through (assuming ...
by Eebster the Great
Sun Mar 12, 2017 10:07 pm UTC
Forum: Language/Linguistics
Topic: Miscellaneous language questions
Replies: 243
Views: 14147

Re: Miscellaneous language questions

No difference here, though there are some contexts where I would use one exclusively. For instance, I would never call a garbage truck a "trash truck" or garbage day "trash day." I also use "trash" as a verb sometimes, but never "garbage." But no, I definitely...
by Eebster the Great
Sat Mar 11, 2017 11:05 am UTC
Forum: Language/Linguistics
Topic: Annoying words, and Words You Hate
Replies: 1906
Views: 317732

Re: Annoying words, and Words You Hate

What does it mean? It refers to the children of "baby boomers." The U.S. (like many countries) had a huge boom in birth rates after WWII, so when that generation started to have children, it produced a smaller "echo boom" in the late 80s and early 90s. Most people call that gene...
by Eebster the Great
Fri Mar 10, 2017 9:27 am UTC
Forum: Mathematics
Topic: What happens if you de-discretize time in the blue eyes riddle?
Replies: 9
Views: 948

Re: What happens if you de-discretize time in the blue eyes riddle?

Instead of allowing an opportunity to leave every day, allow one every hour. Then every minute, every second, every nanosecond... approaching the continuous case as a limit. The implication is that everyone with blue eyes deduces so and leaves instantaneously. Could this idea be made rigorous? They...
by Eebster the Great
Fri Mar 10, 2017 9:23 am UTC
Forum: Science
Topic: Free Will
Replies: 55
Views: 1375

Re: Free Will

So, is it just me not understanding, or does many worlds seem rather like modal realism? Not really. It sort of depends on how you interpret the wave function to begin with. In MWI, the wave function is the real object; particles are just almost asymptotically pointlike parts of the wavefunction wh...
by Eebster the Great
Mon Mar 06, 2017 11:14 am UTC
Forum: Science
Topic: How can we experminetly determine the acceleration due to gravity?
Replies: 20
Views: 837

Re: How can we experminetly determine the acceleration due to gravity?

But for an object rolling without slipping, some of the gravitational potential energy is transformed into rotational energy. If I do the calculations right, the proportion depends on the ratio of the moment of inertia of the object and the product of its mass and the square of its rolling radius, ...
by Eebster the Great
Mon Mar 06, 2017 11:11 am UTC
Forum: Language/Linguistics
Topic: Regional Dialect and Idiolect Oddities (pronunciation)
Replies: 521
Views: 146023

Re: Regional Dialect and Idiolect Oddities (pronunciation)

I think English speakers are generally not great at distinguishing between certain voiced, unaspirated constants and unvoiced, unaspirated constants, like b and p, t and d, or k and g. Consider the fast food restaurant Sbarro's. How do you say it? Or Tao?
by Eebster the Great
Sun Mar 05, 2017 2:27 pm UTC
Forum: Mathematics
Topic: What happens if you de-discretize time in the blue eyes riddle?
Replies: 9
Views: 948

Re: What happens if you de-discretize time in the blue eyes riddle?

You would need to restate the problem in a continuous form to get a specific answer. There is more than one thing you could mean here because the original puzzle wasn't worded very formally. A major problem is that if they vanish instantly as you say (and everyone sees this instantly), and moreover,...
by Eebster the Great
Sun Mar 05, 2017 10:20 am UTC
Forum: Science
Topic: How can we experminetly determine the acceleration due to gravity?
Replies: 20
Views: 837

Re: How can we experminetly determine the acceleration due to gravity?

Rolling balls down inclined planes of varying angles is a pretty good way to go. If we neglect rolling and air resistance (which may be done if the balls are hard, round, and smooth, the ramp is somewhat smooth, and the speed is never very high), the acceleration is a  = ( g · ɵ̂ ) ɵ̂ , where g is t...
by Eebster the Great
Sat Mar 04, 2017 6:37 am UTC
Forum: Language/Linguistics
Topic: Miscellaneous language questions
Replies: 243
Views: 14147

Re: Miscellaneous language questions

It seems like a plausible common error whether or not ant change is occurring.
by Eebster the Great
Fri Mar 03, 2017 3:38 am UTC
Forum: Language/Linguistics
Topic: Complexity of grammar
Replies: 6
Views: 506

Re: Complexity of grammar

^ Nouns, pronouns, and adjectives don't conjugate, they decline . In English, declension is fairly straightforward, but there are complications such as personal pronouns (which are all irregular) and the innumerable irregular plural forms (e.g. "oxen"). When learning Latin, you have to lea...
by Eebster the Great
Fri Mar 03, 2017 3:10 am UTC
Forum: Logic Puzzles
Topic: Escape the Frictionless Circle
Replies: 136
Views: 18614

Re: Escape the Frictionless Circle

The puzzle as phrased has only gimmicky solutions. Changing the center of mass of a system requires an unbalanced external force. In the idealized scenario, making reasonable assumptions (e.g. level ground, no magnetic field), the only external force on the system is gravity, which is exactly balanc...
by Eebster the Great
Thu Mar 02, 2017 8:15 pm UTC
Forum: Science
Topic: Storing Nuclear Waste on the Moon
Replies: 29
Views: 1352

Re: Storing Nuclear Waste on the Moon

p1t1o wrote:This series of documentaries on the dangers of storing the waste on the moon is an eye-opener:

https://en.wikipedia.org/wiki/Space:_1999

That must have been one hell of an explosion...
by Eebster the Great
Wed Mar 01, 2017 5:43 am UTC
Forum: Science
Topic: What is the Biggest Non-Repeating Molecule?
Replies: 39
Views: 3454

Re: What is the Biggest Non-Repeating Molecule?

DNA and proteins are much more complicated than you give them credit for. For instance, proteins usually include disulfide bridges within and between chains, so there is more to them than just the primary sequence. They also may contain charges or form salts, polymers, salts of polymers, ligand comp...
by Eebster the Great
Tue Feb 28, 2017 6:41 pm UTC
Forum: Science
Topic: What is the Biggest Non-Repeating Molecule?
Replies: 39
Views: 3454

Re: What is the Biggest Non-Repeating Molecule?

Surely a monatomic gas has at least as much "information per atom" as any other chemical.
by Eebster the Great
Fri Feb 24, 2017 5:29 am UTC
Forum: Language/Linguistics
Topic: Miscellaneous language questions
Replies: 243
Views: 14147

Re: Miscellaneous language questions

Loodikrus. (And rather than edit again , it occured to me that "lute/loot" (semi-long vowel) differ as per "buck/book" (shorter vowel, each). Normally indistinguishable, but subtly different if you're trying to say them with the same background intonation.) I have /lu:t/ for bot...
by Eebster the Great
Thu Feb 23, 2017 8:40 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1798: "Box Plot"
Replies: 15
Views: 1840

Re: 1798: "Box Plot"

I remember learning about box plots in fifth grade and thinking they were the silliest, most useless things I had ever seen (in fairness to my fifth grade self, there is absolutely no reason to learn about box plots that young). Boy was I surprised when I started to read scientific papers in high sc...
by Eebster the Great
Thu Feb 23, 2017 8:33 am UTC
Forum: Language/Linguistics
Topic: Regional Dialect and Idiolect Oddities (pronunciation)
Replies: 521
Views: 146023

Re: Regional Dialect and Idiolect Oddities (pronunciation)

For me, the h in "herb" is always silent and the h in "Herbert" is always pronounced. As I understand it, in RP the opposite is typical. My pronunciation would extend to derived forms like "herbal," "herbalist," and "herbivore"--the h is always silen...
by Eebster the Great
Thu Feb 23, 2017 8:25 am UTC
Forum: Language/Linguistics
Topic: Miscellaneous language questions
Replies: 243
Views: 14147

Re: Miscellaneous language questions

/skj/ is a pretty complicated consonant cluster. All the pronunciations you gave would be plausible given the spelling, but /sku-/ is the easiest to say. There are no perfect comparisons to lend one particular pronunciation more weight ("Cuba" is a Spanish proper noun, "CUNY" is ...
by Eebster the Great
Sun Feb 19, 2017 7:19 pm UTC
Forum: Language/Linguistics
Topic: Regional Dialect and Idiolect Oddities (pronunciation)
Replies: 521
Views: 146023

Re: Regional Dialect and Idiolect Oddities (pronunciation)

/ɪnfrʌrɛd and /kræn/. Actually, the vowel in "crayon" is a bit more complicated than that. It's a diphthong or triphthong that sounds a bit like ay-in.

I pronounce "crayon" the same way I pronounce "crown"

wat
by Eebster the Great
Sat Feb 18, 2017 10:59 pm UTC
Forum: Language/Linguistics
Topic: Miscellaneous language questions
Replies: 243
Views: 14147

Re: Miscellaneous language questions

The singular "ethic" definitely gets use. You will hear about the importance of "a good work ethic," for instance.
by Eebster the Great
Sat Feb 18, 2017 10:56 pm UTC
Forum: Language/Linguistics
Topic: Regional Dialect and Idiolect Oddities (pronunciation)
Replies: 521
Views: 146023

Re: Regional Dialect and Idiolect Oddities (pronunciation)

I definitely don't pronounce the first r any more than I pronounce the d in "Wednesday" before the n. But it doesn't seem that unusual to me to pronounce the r, just less common (whereas /'wɛdnᵻsdeɪ/ is practically unheard of).

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