Search found 2187 matches

by speising
Tue Oct 16, 2012 6:47 pm UTC
Forum: Science
Topic: FTL Travel
Replies: 22
Views: 5005

Re: FTL Travel

If your only tools are "slower than light travel" and "going back in time", then no. You have get there slower than light, then go back in time. Which is, of course, a method of ftl travel in itself, as noted in another thread in fictional science. If you travel stl, but quite f...
by speising
Sat Oct 13, 2012 6:37 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 426155

Re: 1067: "Pressures"

I find it funny that steve after 88 pages of this still thinks the effekts of SR are something like an optical illusion or naive approach to measurement. As if physicists would think a person a few meters away is smaller than up close, just because they see them under a smaller angle.
by speising
Tue Oct 09, 2012 8:55 am UTC
Forum: Science
Topic: Are shadows cast by moonlight larger than those by sunlight?
Replies: 16
Views: 3734

Re: Are shadows cast by moonlight larger than those by sunli

iirc the Sun's diameter is about 400 times that of the Moon, and about 400 times further away. Nope. Distance to the sun is about 150 million km. Distance to the moon about 144 thousand km (alternatively: 8 light minutes and 1/2 a light second). So a factor 1000 different. Actually, the distance to...
by speising
Mon Oct 08, 2012 5:47 pm UTC
Forum: Science
Topic: Are shadows cast by moonlight larger than those by sunlight?
Replies: 16
Views: 3734

Re: Are shadows cast by moonlight larger than those by sunli

I would first point out that the greek has to prove first that sun and moon have he same absolute luminosity. Which is of course not the case.
by speising
Mon Oct 08, 2012 1:30 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 426155

Re: 1067: "Pressures"

well, there's no prove that Francis E. Dec, Esq. was psychotic, either.
by speising
Fri Oct 05, 2012 12:49 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 426155

Re: 1067: "Pressures"

...just a constant speed of light. OK? depends... actual speed is constant, then okay. observed/measured speed is always constant, then I do not agree. imho, claiming there's anything "actual", as different to "observed", is akin to claiming the existence of "god". jus...
by speising
Thu Oct 04, 2012 5:51 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 426155

Re: 1067: "Pressures"

steve waterman wrote:

Two clocks passing time at two different rates cannot both be accurately tracking the universal present, imo.


What is this "univeral present"? I thought the whole point of relativity was that he is no such thing. Simultanity depends on reference frame.
by speising
Thu Oct 04, 2012 5:45 pm UTC
Forum: Science
Topic: Terraforming Venus
Replies: 34
Views: 7874

Re: Terraforming Venus

How would a mirror change the rotation? I thought that was proposed as as alternative to changing the spin, a sort of superimposed artificial day/night cycle.
by speising
Thu Oct 04, 2012 3:16 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 426155

Re: 1067: "Pressures"

I've read that light was generally considered "instantaneous" until Ole Rømer noticed anomalies within the movement of Jupiter's moons in the mid-to-late 17th century (1660s or 1670s, iirc) that led to the first notable calculations of a "speed of light". He was significantly of...
by speising
Thu Oct 04, 2012 12:37 pm UTC
Forum: Science
Topic: Terraforming Venus
Replies: 34
Views: 7874

Re: Terraforming Venus

i, personally, wouldn't feel comfortable on a planet that relies on vulnerable technology to remain habitable. we know what idiots are out there who would love to blow those things up. (this applies to space habitats too, obviously, but a mirror is still more easily destroyed than, say, a hollowed o...
by speising
Sat Sep 29, 2012 2:41 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1110:"Click and Drag"
Replies: 595
Views: 656808

Re: 1110:"Click and Drag"

Also, theres no link to the forums on m.

There has also not been a link to the forums on non-m for quite some time.

.
.
.
Ahem....

Yes?


That was a joke.
by speising
Fri Sep 28, 2012 11:50 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1110:"Click and Drag"
Replies: 595
Views: 656808

Re: 1110:"Click and Drag"

Since i got an ipad, i'm pretty annoyed by websites that don't work with touch. Like the title texts on xkcd btw. The title texts are not showing on iPad? Use http://m.xkcd.com I know. But why? It can render complex pages just fine, thank you. Also, theres no link to the forums on m. . . . Ahem....
by speising
Fri Sep 28, 2012 9:48 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1110:"Click and Drag"
Replies: 595
Views: 656808

Re: 1110:"Click and Drag"

Anyone posted a link to this yet? It's pretty damn awesome. How do I play? It just changes balloon-person <--> ghost, nothing else happens. You have to click and hold the button somewhere in the world to move there. Clicking your character is useful in case you get stuck. Since i got an ipad, i'm p...
by speising
Fri Sep 28, 2012 7:46 pm UTC
Forum: Fictional Science
Topic: (All) Possible Methods of FTL
Replies: 19
Views: 8087

Re: (All) Possible Methods of FTL

just say that "Einstein was wrong. It's just a theory after all". cf. "skylark of space" by e.e. smith.
by speising
Wed Sep 26, 2012 4:42 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1113: "Killed In Action"
Replies: 78
Views: 18024

Re: 1113: "Killed In Action"

I looked at some statistics from the US Bureau of Labor, apparently most desk jobs employees require more sick days than construction workers. So, the logical solution would be to put the retiring cops on a construction site. But it's not about sick days. A dead cop doesn't require any sick leave.
by speising
Fri Sep 14, 2012 1:11 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1108: "Cautionary Ghost"
Replies: 155
Views: 27121

Re: 1108: "Cautionary Ghost"

doogly wrote:I agree with the comic 100%. Nobody should give a shit about "literally." The subjunctive is my favorite grammar nibble.


at least, nobody should literally give a shit about "literally", please.
by speising
Thu Sep 06, 2012 5:16 pm UTC
Forum: Fictional Science
Topic: Examples of terrible science in fiction
Replies: 195
Views: 50449

Re: Examples of terrible science in fiction

Never mind the burning, how would you draw on it?
by speising
Thu Sep 06, 2012 2:05 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1103: "Nine"
Replies: 138
Views: 29658

Re: 1103: "Nine"

they also say "Never attempt to microwave a turkey that is larger than twelve to fourteen pounds or that is too large for your microwave."
both of which would probably be violated by a 24lb monster. (i guess. not much practice with whole turkeys here in austria)
by speising
Thu Sep 06, 2012 1:35 pm UTC
Forum: Science
Topic: Light in infinite directions?
Replies: 16
Views: 2784

Re: Light in infinite directions?

a) i'd think the frequency change due to doppler effekt.
b) dunno, SR?
by speising
Thu Sep 06, 2012 12:58 pm UTC
Forum: Science
Topic: Light in infinite directions?
Replies: 16
Views: 2784

Re: Light in infinite directions?

thank you, that's the first time someone resolved/explained the wave-particle dualism with QM for me. i learned something! :D
by speising
Wed Sep 05, 2012 3:13 pm UTC
Forum: Fictional Science
Topic: Examples of terrible science in fiction
Replies: 195
Views: 50449

Re: Examples of terrible science in fiction

AvatarIII wrote:your sweat and all exposed moisture would boil, not just evaporate quickly. I doubt your eyes, ears, under your nails, (mouth and nose if exposed) genitals and anus would do too well in the short term.


is that really a problem? i mean, is boiling water dangerous if it's still at body temperature?
by speising
Wed Sep 05, 2012 2:28 pm UTC
Forum: Fictional Science
Topic: FTL in my book
Replies: 63
Views: 23143

Re: FTL in my book

IMHO, saying you have a working time machine is on par, if not even equal to stating you have FTL.
so explaining an FTL drive with time travel is a tautology.
by speising
Wed Sep 05, 2012 2:23 pm UTC
Forum: Fictional Science
Topic: Examples of terrible science in fiction
Replies: 195
Views: 50449

Re: Examples of terrible science in fiction

i just read "Brigands of the Moon" (1931), where the passengers of the ship are marooned (by aforementioned brigands, swashbuckling martians) on an asteroid they pass (by chance!) about 1/5 of the way from earth to mars. the asteroid is tiny, yes has (of course breathable) atmosphere, wate...
by speising
Wed Sep 05, 2012 1:16 pm UTC
Forum: Fictional Science
Topic: Examples of terrible science in fiction
Replies: 195
Views: 50449

Re: Examples of terrible science in fiction

AvatarIII wrote:...so ERB had no real excuse, he might as well have, and probably should have said Mars was some planet in another star system.


Even in the 50's SF people walked on mars with nothing more than light oxygen masks (or nothing if they went only for a quick smoke or sth.).
by speising
Tue Sep 04, 2012 5:58 pm UTC
Forum: What If?
Topic: What-if 0010: "Cassini"
Replies: 74
Views: 20620

Re: What-if 0010: Cassini

And why not mention the climate they would experience at the Amundsen–Scott South Pole Station, assuming someone would survive after they dropped down almost 3 kilometres :D Oh wow, I didn't realise the weight of all that damn snow and ice could actually sink a bloody continent down, and by that ma...
by speising
Mon Sep 03, 2012 6:04 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1103: "Nine"
Replies: 138
Views: 29658

Re: 1103: "Nine"

I bought a microwave with a knob instead of buttons, largely because of this. I have a knob microwave too, though with no reason. What drives me crazy is that it goes straight from 0, 1, 2, … up to 10, then switches the timescale so it looks like: … - 7 - 8 - 9 - 10 - 20 - 30 - 40 - 50 - 60. How th...
by speising
Mon Sep 03, 2012 5:03 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1103: "Nine"
Replies: 138
Views: 29658

Re: 1103: "Nine"

i finally created an account, just to say that i am of the firm conviction that the only sensible microwave UI consists of exactly 2 (two) analog knobs. i need only a twirl of the timer knob to set and start any arbitrary time. sure, its not exact to the second, but that is not a problem if you don'...

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