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Namek
Topic Started: Nov 27 2010, 12:06 AM (696 Views)
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Tom forgot about the universal gravitational constant.
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J. Bizzle92
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Sup homeskillets. I dunno if anyone remembers me, but I just happened to visit the forum for the first time in idk how many years, and I saw this thread and I wanted to make a few comments cause this is something I'm pretty interested in.

Quote:
 
Maybe I'm wrong but, when you're in space there's no resistance of any kind.


Space is filled with microscopic particles (various dust and debris) that would become increasingly dangerous as one approaches higher velocities. Like already stated, traveling at light speed is impossible because it would require infinite energy to accelerate an object with mass to that speed.

Quote:
 
. . .but I would say the technology to move this vessel is similar to the dark matter engines professor Farnsworth created in Futurama. They work by keeping the vessel in place while rotating the entire universe around that fixed point. And it's known the universe expands faster than the speed of light, so is it too much to say the universe cant move around a point faster than the speed of light?


It's a minor point, but I think moving the entire universe around a "fixed" object would still require the same amount of energy as it would take to move the object relative to the universe (general relativity tells us that there is no universal frame of rest, so saying the universe is moving around you is just as valid as saying you are moving through the universe, meaning that it takes the same amount of energy to do both because, mathematically, they are the same actions).

What they were after was a way to harness dark energy (the hypothesized force that drives the expansion of the universe). Instead of rotating the universe, mathematical models propose that you can contract spacetime in front of your ship and simultaneously expand it behind you, creating a warp bubble that travels through space, carrying you along with it (look up Alcubierre metric). The bubble itself would travel faster than light. There are a lot more other suggestions - this is just the first thing that seemed most relevant.

Quote:
 
You know what's also interesting.. quantum theory. It's basically the idea that right before every action, the universe splits into two (or however many outcomes of that action) in order to accomodate every action. So there's an ever expanding amount of universes based on all of the outcomes of your actions


That's one level of the idea of the multiverse (many-worlds interpretation of QM). There are other levels in which the different universes can have different properties (realizing different levels of what constitutes a "real and possible" universe). The many-worlds interpretation is the second highest level; the highest level suggests that a universe exists for every possible mathematical model (which I think is a vague as shit interpretation).

M-Theory, which I think is a far more satisfying multiverse hypothesis. It's hella complicated, so if anyone wants me to explain a bit of it in a really rudimentary way after wiki fails you, I might make a new post.

Quote:
 
There's a great image I saw that shows the Earth, then solar system, then galaxy etc. etc.


Gahh, there was this dynamic program/applet/thing which allowed you to 'scroll' through the different magnitudes, all the way from plank length up to (the object would shrink down to reveal the next order of magnitude) the size of the observable universe. I'm mad I can't find it.

From my varyingly undependable resources: possible double major in aerospace engineering and physics; Brian Greene's, Michio Kaku's, etc. mind-blowing books on QM; acing the hell out of PHYS 214 (intro to waves and quantum physics); wikipedia; and a host of other random things I've picked up.
Edited by J. Bizzle92, Dec 6 2010, 09:24 PM.
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Mclf1

And that's why I'm in Civil... Physics 2 is all I needed lol High school level stuff

Relativity... Every time I hear that word I learn something that blows my mind lol Makes sense though, no shortcuts in physics

As for the universe--> plank thing? This?

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Posted ImageChris
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I suddenly feel extremely small AND extremely large by that short demonstration Zee.
Interested in playing Minecraft? Read up here: bitlegend.com
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J. Bizzle92
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^^ Nah, that wasn't it. They were all drawn and you moved a slider to change magnitudes. It included a good amount of size references: quarks, protons, HIV viruses, giant worms, and supeclusters were all in it.

Also, all engineering majors are required to take 214 lol =/.

EDIT: Holy shit I found it: http://primaxstudio.com/stuff/scale_of_universe/
Edited by J. Bizzle92, Dec 8 2010, 12:42 AM.
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Zee
Dec 6 2010, 11:14 PM
And that's why I'm in Civil... Physics 2 is all I needed lol High school level stuff

Relativity... Every time I hear that word I learn something that blows my mind lol Makes sense though, no shortcuts in physics

As for the universe--> plank thing? This?

I feel the need to defend Civl lol. I love physics and find it interesting. That being said, I want a good paying job that I enjoy. Done :12


Also: What's up J Bizzle. Totally remember you haha
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J. Bizzle92
http://s12.zetaboards.com/Cutthroat_Syndicate/single/?p=8008002&t=5055534

Wow! This is incredible.
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Chris
Dec 8 2010, 11:25 AM
J. Bizzle92
http://s12.zetaboards.com/Cutthroat_Syndicate/single/?p=8008002&t=5055534

Wow! This is incredible.
What he said^^^
But I didn't see Namek there :P

Not gonna deny it Civil's got (relatively) it easy lol I love it, but still :S
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Zee
Dec 10 2010, 09:03 PM
Chris
Dec 8 2010, 11:25 AM
J. Bizzle92
http://s12.zetaboards.com/Cutthroat_Syndicate/single/?p=8008002&t=5055534

Wow! This is incredible.
What he said^^^
But I didn't see Namek there :P

Not gonna deny it Civil's got (relatively) it easy lol I love it, but still :S
You'll take it back if/when you're writing 30 page lab reports once a week.
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Stephen
Dec 11 2010, 01:50 PM
Zee
Dec 10 2010, 09:03 PM
Chris
Dec 8 2010, 11:25 AM
J. Bizzle92
http://s12.zetaboards.com/Cutthroat_Syndicate/single/?p=8008002&t=5055534

Wow! This is incredible.
What he said^^^
But I didn't see Namek there :P

Not gonna deny it Civil's got (relatively) it easy lol I love it, but still :S
You'll take it back if/when you're writing 30 page lab reports once a week.
It's probably Rutgers, but I work at the CE lab here so I see what the seniors are doing in their lab + their lab reports are sitting around the offices, they're kinda easy looking lol not even close to 30 pages.

But I'll give you this, the research I assist with, a grad student's thesis, seems like sooo much fucking work lol not looking forward to that, but even he doesn't do 30 pages in 1 week... I haven't seen anyone do that much?
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Zee
Dec 11 2010, 02:46 PM
Stephen
Dec 11 2010, 01:50 PM
Zee
Dec 10 2010, 09:03 PM
Chris
Dec 8 2010, 11:25 AM
J. Bizzle92
http://s12.zetaboards.com/Cutthroat_Syndicate/single/?p=8008002&t=5055534

Wow! This is incredible.
What he said^^^
But I didn't see Namek there :P

Not gonna deny it Civil's got (relatively) it easy lol I love it, but still :S
You'll take it back if/when you're writing 30 page lab reports once a week.
It's probably Rutgers, but I work at the CE lab here so I see what the seniors are doing in their lab + their lab reports are sitting around the offices, they're kinda easy looking lol not even close to 30 pages.

But I'll give you this, the research I assist with, a grad student's thesis, seems like sooo much fucking work lol not looking forward to that, but even he doesn't do 30 pages in 1 week... I haven't seen anyone do that much?
Yay for our materials lab! .... I'm hoping steel lab and concrete lab next semester wont be that much.
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Mclf1

Exactly how do you get 30 pages out of a lab?
Even this 15 pg paper for my scientific/technical writing class is full of barely-relevant research, and this was over the entire semester
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Zee
Dec 11 2010, 08:18 PM
Exactly how do you get 30 pages out of a lab?
Even this 15 pg paper for my scientific/technical writing class is full of barely-relevant research, and this was over the entire semester
1 page cover page, 1 page abstract, 1 page table of contents, 10-12 page introduction, setup, materials, tools, predictions, data recording and discussion, probably 12-14 pages of graphs and analysis, 1-2 conclusion and 1-2 references.

P.S. They make us go way graph heavy, so I'm sure that contributes a lot
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