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Forum » SpaceEngine » Off-topic Discussions » Totally off-topic thread (Talk about anything.)
Totally off-topic thread
HarbingerDawnDate: Thursday, 27.06.2013, 16:30 | Message # 1441
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If the change was "instantaneous", the entire planet would be destroyed. But talking about instantaneous events of this type is absurd since any possible mechanism for causing such a reversal would take considerable time, and would have little if any harmful effect on the planet or its inhabitants.

Nearly anything that happens "instantly" will be devastating, yet I don't hear predictions of doom for every single action which has ever been mentioned in every post on the forum, hence my objection.





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Edited by HarbingerDawn - Thursday, 27.06.2013, 16:32
 
WatsisnameDate: Thursday, 27.06.2013, 20:49 | Message # 1442
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Well yeah, even the word instantaneous is absurd when you really get down to it.

Reversing the Earth's rotation would require an energy comparable to the amount required to melt the whole Earth if it were made entirely of iron (~10%), and since most of the Earth is made of silicate rather than iron, and already very hot in the interior, this fraction is actually much larger and perhaps greater than 1. Comparing to gravitational binding energy it's still a significant 0.17%. So there's no way the spin could be reversed on any sort of rapid timescale without having disastrous results, but I was just having some fun with the notion of everything going flying sideways. tongue





 
HarbingerDawnDate: Friday, 28.06.2013, 00:06 | Message # 1443
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Quote (Watsisname)
I was just having some fun with the notion of everything going flying sideways

If we assumed that the atmosphere followed the surface in this switch, then everyone would be burned up immediately due to their extreme airspeed. Little charred humans flying through the air, bodies being broken by the extreme air resistance. How pleasant.





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WatsisnameDate: Friday, 28.06.2013, 01:00 | Message # 1444
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930m/s isn't fast enough of an air speed to cause immediate incineration (though it'd certainly be lethal), and the speed also decreases as the cosine of the latitude. If you were within 1 degree of the poles the fling would even be survivable.




 
HarbingerDawnDate: Friday, 28.06.2013, 03:44 | Message # 1445
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Quote (Watsisname)
930m/s isn't fast enough of an air speed to cause immediate incineration

That's nearly mach 3. You wouldn't catch on fire, but you would probably be burned. Aircraft traveling at that speed above more than 90% of the atmosphere need to be constructed with heating in mind. I would imagine that the heating caused by being at sea level would be a bit more than at 20 kilometers high. It would last for a short time since you would rapidly slow to terminal velocity, but I should think it would be sufficient to cause burns.





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WatsisnameDate: Friday, 28.06.2013, 05:25 | Message # 1446
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Oh, yeah, I don't doubt there'd be some thermal burns. At Mach 3 heating effects start to become very important in aircraft design, but as you said altitude and duration have to be considered, too. I'd really have to be more knowledgeable on the physics of aerodynamic heating and drag to be able to conclude more than that.

...this has turned into quite a bizarre physics conversation. So to get back on topic, here's a video of a Parrot dancing Gangnam Style.

I have not seen such a classy bird. Where can I get one?





 
ProteusDate: Friday, 28.06.2013, 06:35 | Message # 1447
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Got bored and decided to make a custom Stylish script with a modified banner.



If you have stylish installed in your browser, you can get the script here:

http://userstyles.org/styles....2398267







Edited by Proteus - Friday, 28.06.2013, 06:45
 
midtskogenDate: Friday, 28.06.2013, 07:17 | Message # 1448
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I got one of those SD cards with wifi yesterday, and I soon discovered that it has an ARM926 CPU with 32MB RAM running Linux and found a way to enable telnet and get root access. With 32GB flash on the card almost anything can be compiled and run on this little thing. This is the smallest truly general purpose computer that I have. It's a pretty cool concept, I think. smile Not that much more expensive than a regular 32GB card either. The wifi range sucks, though.

I'm thinking of putting this card into a 1920x1080 dashcam which records continuously, and using this card I can download the video as it's written to the card by the camera. It could work for fireball monitoring. Obviously, the CPU on the card itself is too weak to do live analysis of 1080p30 video, but perhaps in a few years it will be possible to do everything on such a card. The computing power probably roughly corresponds to a typical 1994 486SX PC, just with slightly more RAM, higher clock speed, and a hell of lot more fast external storage [32 GB would probably be close to the total amount of shared disk available at my university at that time].

I bought my first Linux PC in 1993. It was a 33 MHz 486DX with 16 MB RAM (considered luxury) and a 200 MB hard drive. Fairly bleeding edge at the time.





NIL DIFFICILE VOLENTI


Edited by midtskogen - Friday, 28.06.2013, 07:21
 
werdnaforeverDate: Saturday, 29.06.2013, 02:57 | Message # 1449
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Joey_PenguinDate: Saturday, 29.06.2013, 20:32 | Message # 1450
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That's our werdna!




Careful. The PLATT Collective has spurs.
 
werdnaforeverDate: Sunday, 30.06.2013, 06:21 | Message # 1451
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Quote (Joey_Penguin)
That's our werdna!


MadTV was amazing! Somehow it was canceled while the garbage some call SNL still remains. It's beyond me.

Also the omnibowl is an amazing product- I swear to god it works as advertized. It's... it's... it's better than spaceengine!
 
HarbingerDawnDate: Sunday, 30.06.2013, 15:24 | Message # 1452
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Today's English lesson for everyone






All forum users, please read this!
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Phenom II X6 1090T 3.2 GHz, 16 GB DDR3 RAM, GTX 970 3584 MB VRAM
 
midtskogenDate: Sunday, 30.06.2013, 15:38 | Message # 1453
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You forgot it's vs. its.




NIL DIFFICILE VOLENTI
 
HarbingerDawnDate: Sunday, 30.06.2013, 16:09 | Message # 1454
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Quote (midtskogen)
You forgot it's vs. its.

I didn't forget anything, you'll have to take that up with Grammarly. Also, fitting every error of that type on one image would either make the image very large or the text very small.





All forum users, please read this!
My SE mods and addons
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werdnaforeverDate: Sunday, 30.06.2013, 17:40 | Message # 1455
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Quote (HarbingerDawn)
Today's English lesson for everyone

I think you mean "Today's English lesson for people who use English as a second language, and elementary school children."
 
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