Search found 806 matches

by ijuin
Tue Sep 04, 2018 5:20 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2041: "Frontiers"
Replies: 11
Views: 1595

Re: 2041: "Frontiers"

Space officially begins 100 km above mean sea level above every location on Earth, so it is indeed closer than just about any place that is more than two or three hours’ drive away.
by ijuin
Fri Aug 31, 2018 1:44 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2039: "Begging the Question"
Replies: 145
Views: 7966

Re: 2039: "Begging the Question"

I have encountered enough people using “literally” as hyperbole that, when I want to ensure that people understand that I am NOT intending hyperbole, I use “actually” instead.
by ijuin
Fri Aug 31, 2018 1:35 am UTC
Forum: Serious Business
Topic: Could Truth be Beauty?
Replies: 32
Views: 1600

Re: Could Truth be Beauty?

I am not familiar with “fountain”—can you provide a reference for us?
by ijuin
Tue Aug 28, 2018 7:31 am UTC
Forum: Science
Topic: Word Based Consciousness
Replies: 11
Views: 922

Re: Word Based Consciousness

That speaks only of your ability to communicate the idea, not your ability to think of it.
by ijuin
Tue Aug 28, 2018 12:32 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2038: "Hazard Symbol"
Replies: 39
Views: 3239

Re: 2038: "Hazard Symbol"

Even more nasty is Dioxygen Difluoride, also known by its molecular structure as “FOOF”. Not only does it react with nearly everything, but it is HIGHLY unstable on its own and must be kept at just above its melting point (110K) or else it will explode by itself.
by ijuin
Mon Aug 27, 2018 8:48 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1831: "Here to Help"
Replies: 21
Views: 7266

Re: 1831: "Here to Help"

I call that one “Digital Dominance Syndrome”—it’s seen a LOT in post-millennials who seem to believe that all worthwhile solutions are digital in nature and any analogue or hardware/physical solutions are inscrutable.
by ijuin
Sun Aug 26, 2018 5:57 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2035: "Dark Matter Candidates"
Replies: 55
Views: 4746

Re: 2035: "Dark Matter Candidates"

In that case, the jet is a Shkadov thruster, forming a major component of the sphere’s propulsion. As far as thermal camouflage goes, anybody advanced enough to be a threat to a Kardashev type 2.0 or higher civilization would be able to detect and track Dyson Spheres by their gravitation rather than...
by ijuin
Sun Aug 19, 2018 12:07 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 90451

Re: Science-based what-if questions

The mass of air superheated by the release of energy will vastly dwarf the mass of any functional nuclear bomb. At sea level, each cubic meter of air affected equals about a kilogram and a half, so six thousand cubic meters or so (i.e. a sphere about ten meters in radius) will outmass any but the la...
by ijuin
Sun Aug 12, 2018 9:53 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 90451

Re: Science-based what-if questions

A nuclear-driven explosion would produce a large number of high-speed neutrons and protons that would collide with the nuclei of the surrounding air/whatever and cause secondary radioactivity. The matter-conversion explosion, by contrast, would have only high-energy photons.
by ijuin
Sun Nov 20, 2016 5:33 pm UTC
Forum: Science
Topic: Is entanglement that surprising?
Replies: 27
Views: 6936

Re: Is entanglement that surprising?

That's fine for catching the ball, but how about the pitcher? The pitcher does have to do all of his determination of where the ball will go before it is airborne, so to throw any pitch which he hasn't already practiced under the exact same distance snd weather conditions does require advance predic...
by ijuin
Sun Nov 20, 2016 5:07 am UTC
Forum: Science
Topic: Toroidal star
Replies: 14
Views: 3827

Re: Toroidal star

The problem, as I understand it, is that maintaining a toroidal shape would require a net outward force that is greater closer to the center than it is farther away. Unfortunately, rotation and gravity do not work that way. The only force that I can imagine holding a stellar mass in such a shape is ...
by ijuin
Thu Nov 17, 2016 6:53 pm UTC
Forum: Science
Topic: Is entanglement that surprising?
Replies: 27
Views: 6936

Re: Is entanglement that surprising?

As I said, we don't understand them numerically, but we do have the ability to gauge where a projectile will go, which means that the necessary understanding of acceleration and drag is happening on a subconscious level. Aristotle was not able to explain curved projectile motion in terms of laws and...
by ijuin
Thu Nov 17, 2016 5:37 pm UTC
Forum: Science
Topic: Is entanglement that surprising?
Replies: 27
Views: 6936

Re: Is entanglement that surprising?

Newtonian physics is more intuitive to us both because of the simpler equations and because there is survival value in it even with very low technology. What benefit does a caveman get from understanding subatomic particles? On the other hand, being able to predict where a thrown spear will strike? ...
by ijuin
Wed Oct 05, 2016 10:58 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1732: "Earth Temperature Timeline"
Replies: 523
Views: 80712

Re: 1732: "Earth Temperature Timeline"

If the first generation of these SkySails can save 4% of fuel requirements, then it is quite possible that future bigger and better designs could save 10-20%, which would start to put a dent in overall cargo shipping fuel costs.
by ijuin
Thu Sep 29, 2016 11:20 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1737: "Datacenter Scale"
Replies: 57
Views: 14702

Re: 1737: "Datacenter Scale"

Since when are hard drives EVER hot-swappable? I was trained that one ALWAYS does a controlled shutdown and power-off before swapping, or else the new drive will be damaged. To expand on what others have said: your training was correct - for older consumer-grade disks - specifically, MFM and ATA (a...
by ijuin
Thu Sep 29, 2016 11:06 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1732: "Earth Temperature Timeline"
Replies: 523
Views: 80712

Re: 1732: "Earth Temperature Timeline"

Eebster the Great wrote:That's an awfully big turbine for such a small catamaran.


Not really. It looks like the area swept by the turbine blades would be comparable to the combined area of the conventional sails that such a boat would use.
by ijuin
Thu Sep 29, 2016 10:46 pm UTC
Forum: General
Topic: Global Quality of Life Trends and Metrics
Replies: 4
Views: 2510

Re: Global Quality of Life Trends and Metrics

Quality of life is improving in absolute terms (wealth, health, safety from violence), but we have a subjectively reduced sense of well-being because a large number of factions (Politicians, Religion, Industry/Finance, etc.) have a vested interest in making you afraid, so that you will buy into thei...
by ijuin
Thu Sep 29, 2016 10:38 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 90451

Re: what would happen if we squeezed 4000 people into the volume of 1

Since people are mostly water, and water is mostly incompressible, I'm not sure what would happen when you try to compress water by a factor of 4000. Would degenerate matter form? I think at lower pressures some exotic forms of ice would appear, but I don't think any of those ice types are 4000 tim...
by ijuin
Thu Sep 29, 2016 10:32 pm UTC
Forum: Science
Topic: How serious is a 1st degree burn?
Replies: 15
Views: 3739

Re: How serious is a 1st degree burn?

LOL! For anything that has only minor blistering or less, just bandage it and keep it clean until it heals, and it will be fine. Antibiotic, antiseptic, or anaglesic creams may be used if you wish. A quick guide: 1st degree burn: Damages only the epidermal layers. Pain and redness but little to no b...
by ijuin
Mon Sep 26, 2016 4:06 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1737: "Datacenter Scale"
Replies: 57
Views: 14702

Re: 1737: "Datacenter Scale"

ijuin, the server is never pulled from the rack. If the server is running a mirrored RAID configuration, then it never even leaves service. Otherwise the tech has to rebuild the RAID, and then remirror the contents from another server. Servers these days are also smarter, and can self-diagnose and ...
by ijuin
Sun Sep 25, 2016 4:34 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 90451

Re: Science-based what-if questions

Eebster the Great wrote:
ijuin wrote:Luna.

The Moon?

Yes, that Luna.
by ijuin
Sun Sep 25, 2016 2:03 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1732: "Earth Temperature Timeline"
Replies: 523
Views: 80712

Re: 1732: "Earth Temperature Timeline"

Little bit of a correction for you here As seems usual for this aspect of the denialist position, you seem to have missed the fact that (maybe-)humans being able to survive in a warmer Earth is not remotely the same thing as modern civilization being able to continue uninterrupted through a return ...
by ijuin
Sun Sep 25, 2016 1:39 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1737: "Datacenter Scale"
Replies: 57
Views: 14702

Re: 1737: "Datacenter Scale"

Oh, and the cost ratio between parts and human work is slightly different for light bulbs and servers. Slightly. Yeah. The technician who can diagnose and replace parts in a server is considerably more expensive. If it takes one man-hour to replace a hard drive, counting from the moment the server ...
by ijuin
Sat Sep 24, 2016 4:37 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1736: "Manhattan Project"
Replies: 29
Views: 6831

Re: 1736: "Manhattan Project"

Brought peace?
by ijuin
Thu Sep 22, 2016 8:47 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1736: "Manhattan Project"
Replies: 29
Views: 6831

Re: 1736: "Manhattan Project"

The problem is that cancer doesn't have a single cause or even a keystone mechanism by which it occurs (e.g. a set of genetic mutations common to all cancers). Cancer can be caused by literally anything that breaks a cell's regulating mechanisms which normally prevent it from dividing out of control...
by ijuin
Mon Sep 19, 2016 9:50 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 90451

Re: Science-based what-if questions

The now-airless glass Earth would receive the same kind of punishment from meteoroids that any airless body would, such as Luna.
by ijuin
Mon Sep 19, 2016 4:00 pm UTC
Forum: Science
Topic: Theoretical limit to human vision.
Replies: 9
Views: 3480

Re: Theoretical limit to human vision.

The wavelength limitation also increases the Eagle's advantage over mammals, since most large predatory birds can see into the UVA band.
by ijuin
Mon Sep 19, 2016 3:52 pm UTC
Forum: Science
Topic: planetery's core question
Replies: 3
Views: 1671

Re: planetery's core question

Since the amount of heat escaping from the Earth's interior (aside from volcanic eruptions) is about 47 terawatts, that corresponds to about half a gram of mass-energy per second.
by ijuin
Sat Sep 17, 2016 4:56 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1732: "Earth Temperature Timeline"
Replies: 523
Views: 80712

Re: 1732: "Earth Temperature Timeline"

The knee jerk response is often that Evil Oil Companies are preventing it from happening; that they want desperately to prevent anything from replacing oil and other fossil fuels. But that's silly. The reality is, oil companies and energy companies in general are some of the biggest spenders on ren...
by ijuin
Sat Sep 17, 2016 4:29 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 90451

Re: Science-based what-if questions

Glass is not entirely inelastic--optical fibers can bend quite readily without breaking. The thermal expansion and contraction from the day/night cycle and season cycles should be low enough, especially given their relative slowness (it's the extremely rapid cooling that shatters glass when you put ...
by ijuin
Fri Sep 16, 2016 4:53 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1734: "Reductionism"
Replies: 27
Views: 6246

Re: 1734: "Reductionism"

I think that the gag is supposed to be that Reductionism goes too far in assuming that things are merely the sums of their constituent parts, with no added meaning or function resulting from the way in which they are combined. Here, the "break it into its smallest components" notion is bei...
by ijuin
Fri Sep 16, 2016 4:44 pm UTC
Forum: Serious Business
Topic: Ethics of AdBlock
Replies: 639
Views: 119469

Re: Ethics of AdBlock

I'd also like to see "block ads over X megabytes in size". The ones that I find the most annoying are the video ads, which not only have audio which drowns out whatever I was listening to, but also hogs my download bandwidth, greatly slowing down the content that I had come to see, sometim...
by ijuin
Thu Sep 15, 2016 6:07 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 90451

Re: Science-based what-if questions

All right, let's assume that we are using some form of silicate-based glass--the relevant physical properties for our scenario don't vary a lot between the common varieties of silicate glass. You can see a table of these properties at https://en.wikipedia.org/wiki/List_of_physical_properties_of_glas...
by ijuin
Tue Sep 13, 2016 5:09 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 90451

Re: Glass planet.

What chemical composition of glass are you speaking of? Soda-lime glass? Aluminosilicate glass? Fused quartz?
by ijuin
Mon Sep 12, 2016 8:16 pm UTC
Forum: Science
Topic: Acceleration Problem
Replies: 8
Views: 2622

Re: Acceleration Problem

If you're dealing with the kind of gravity seen on a neutron star, then you are certainly going to need to use the General Relativity equations for gravity, space, and time. Thanks to the intense gravity at the surface of a neutron star, both time and space are going to be compressed by a gamma fact...
by ijuin
Mon Sep 12, 2016 8:11 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 90451

Re: Core orbiting planet.

If it crashed into Earth after falling most of the way down Earth's gravity well, then it would be like the original moon-creating giant impact all over again.
by ijuin
Wed Sep 07, 2016 5:27 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1730: "Starshade"
Replies: 18
Views: 5037

Re: 1730: "Starshade"

You want to give NASA the finger?
by ijuin
Wed Sep 07, 2016 3:39 pm UTC
Forum: Serious Business
Topic: Ethics of AdBlock
Replies: 639
Views: 119469

Re: Ethics of AdBlock

What bothers me the most is the use of my computing resources, especially the download time and data usage. Let's say that a given set of video ads takes ten megabytes, and my phone plan charges me ten dollars per gigabyte. The ad has thus cost me ten cents that I did NOT intend to spend. Effectivel...
by ijuin
Tue Sep 06, 2016 6:34 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1719: "Superzoom"
Replies: 41
Views: 10941

Re: 1719: "Superzoom"

No, but there are currently quite a few people still alive who, in their youth, knew people who were born 160-180 years ago. So unless Grandpa is lying about HIS grandpa, we have at least secondhand witnesses.
by ijuin
Tue Sep 06, 2016 6:08 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1719: "Superzoom"
Replies: 41
Views: 10941

Re: 1719: "Superzoom"

There's more than one hollow Earth theory. One I like: the Earth is hollow; we live on the inside; the stars we see at night are actually the lights of cities on the other side of the Earth. :shock: The "stars are city lights" hypothesis doesn't really explain why the stars haven't change...

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