[QUOTE=Foo King;25186932][Media] [url]http://www.youtube.com/watch?v=NNvHdCosX08[/url] [/media][/QUOTE]
i'm tired of seeing that video posted over and over again when it's so utterly WRONG
[QUOTE=ThePuska;25187315]i'm tired of seeing that video posted over and over again when it's so utterly WRONG[/QUOTE]
Explain?
An atom: a wave or a particle? Discuss.
[img]http://dl.dropbox.com/u/433645/A18J9.jpg[/img]
how can it not work
Quantum physicsists are people who make poor choices, but are also extremely intellegent.
You'd need some incredibly tough magnets to lift a person upward, and that person would need some equally impressive strength to pull the magnets away from the metal, which means more muscle which means more weight to lift which means stronger magnets which means bigger muscles etc etc.
I'm sure there's a point where you can do it but you'd need to be like 2000 pounds of pure muscle.
[QUOTE=Foo King;25189062]Explain?[/QUOTE]
When talking about dimensions in physics, we mean either spatial dimensions (we perceive 3 of these) or temporal (time). The video is using it differently, in a more philosophical way. It's a nice thought experiment but it's not science.
[QUOTE=FunnyGamer;25191448]
I'm sure there's a point where you can do it but you'd need to be like 2000 pounds of pure muscle.[/QUOTE]
Are you serious?
[editline]10:03AM[/editline]
[QUOTE=Rad McCool;25186466]Here's another mindfuck:
We humans live and act in 4 spacetime dimensions. That's 3 spacial dimensions [B]([/B]forward/back [B]|[/B] left/right [B]|[/B] up/down[B])[/B] and 1 temporal dimension [B]([/B]forward/back[B])[/B]. Now, if string theory is correct, we should expect more dimensions. Something like 10 spacial dimensions, and 3 temporal dimensions. If the fact that there are more spacial dimensions than our three normal ones is very hard to grasp, then even more mindblowing are the time dimensions. I mean... that means that you can hypothetically travel forward and back in time, but also sideways, and up and down! Travel up and down in time? Good luck imagining that.[/QUOTE]
The extra dimensions in string theory are all spatial.
[QUOTE=Jawalt;25184967]Quantum physics exist only in the minds of old men, and kids who want to act smart.
At least, practically.[/QUOTE]
Hahahahahaha
NO.
[QUOTE=Roswell34;25191396][img_thumb]http://dl.dropbox.com/u/433645/A18J9.jpg[/img_thumb]
how can it not work[/QUOTE]
The bottom magnet would pull up. The top magnets would also pull down. There would be equal force coming from each and therefor nothing would happen.
[editline]05:13PM[/editline]
Also anyone else think the double slit experiment would make a good t-shirt?
[QUOTE=Block;25191523]Are you serious?[/QUOTE]
If you thought I was serious at all then
[QUOTE=Protocol7;25185982]Quantum Physics is theoretical, so this debate won't have any concrete evidence and it won't go anywhere. Especially since none of these kids ever took Physics
I'm in a higher level physics class myself so I could do it but like I'm sure HL Physics kids are almost nonexistent here[/QUOTE]
Hi I'm a junior physics undergrad nice to meet you
[editline]03:17AM[/editline]
When you say "theoretical" I assume you mean "not experimentally verified" which in the case of quantum physics is not true in the least.
[QUOTE=Block;25191523]The extra dimensions in string theory are all spatial.[/QUOTE]
Ahh. Ok.
But extra time dimensions is still something that's relevant to quantum physics. I believe the hypothetical particles Tachyons have the property to move in 3 time dimensions and 1 space. Like, the "opposite" of what our particles move in.
[QUOTE=Jawalt;25185009]Half of it is complete speculation, maybe more. It's not conclusive, and a bit far fetched.
[editline]07:51PM[/editline]
I'm not saying the topic has no basis, but that a lot of it is speculation, yet people discuss this shit like it's well-documented gospel.[/QUOTE]
Quantum physics is the most accurate theory ever devised, and can predict real events with extreme precision
[editline]12:08PM[/editline]
[QUOTE=Protocol7;25185982]Quantum Physics is theoretical, so this debate won't have any concrete evidence[/QUOTE]
Please don't post as you obviously have no idea what quantum physics is
[QUOTE=Rad McCool;25193673]Ahh. Ok.
But extra time dimensions is still something that's relevant to quantum physics. I believe the hypothetical particles Tachyons have the property to move in 3 time dimensions and 1 space. Like, the "opposite" of what our particles move in.[/QUOTE]
Why would you believe such a thing? Because it sounds cool?
The hypothesis about tachyons is that they travel faster than the speed of light and thus backwards in time. They have an imaginary mass.
Everything with real mass: travel slower than light
Everything with no mass: travel at the speed of light
Everything with imaginary mass: travel faster than light
Besides, I'd think tachyons are more particle physics than quantum mechanics.
So much is wrong with this thread... JohnnyMo1 must be raging all the time :v:
[QUOTE=Lord_Skellig;25193788]Quantum physics is the most accurate theory ever devised, and can predict real events with extreme precision
[/QUOTE]
Not really, general relativity, as an example is still the most accurate theory regarding gravity that we have now.
[QUOTE=Lord_Skellig;25193788]Quantum physics is the most accurate theory ever devised, and can predict real events with extreme precision[/QUOTE]
more like with extreme uncertainty am i right he he
-snip-
[QUOTE=Jawalt;25184967]Quantum physics exist only in the minds of old men, and kids who want to act smart.
At least, practically.[/QUOTE]
Tell that to the quantum physicists who are discovering new laws of our reality daily and the folk building quantum processors and single electron readers.
Where is gordon when we need him.
[QUOTE=Activeellis;25198017]Where is gordon when we need him.[/QUOTE]
Where is Avon when we need him.
[QUOTE=Foo King;25185000][B] IS [/B] time travel even possible?[/QUOTE]
There is no physical mechanism forbidding it at the moment but many theories allowing it.
[editline]04:22PM[/editline]
[QUOTE=krail9;25185628]How come when people talk about quantum physics they automatically talk about time travel or alternate universes? Why don't we talk about concepts relevant to science today?[/QUOTE]
Because most don't have a fucking clue what they are talking about and just heard those words in a incoherent mixture in a SciFi movie (technobabbles)
[editline]04:26PM[/editline]
[QUOTE=FunnyGamer;25191448]You'd need some incredibly tough magnets to lift a person upward, and that person would need some equally impressive strength to pull the magnets away from the metal, which means more muscle which means more weight to lift which means stronger magnets which means bigger muscles etc etc.
I'm sure there's a point where you can do it but you'd need to be like 2000 pounds of pure muscle.[/QUOTE]
The method described in [url=http://dl.dropbox.com/u/433645/A18J9.jpg]that picture[/url] never works. Actio = Reactio. The force which accelerates the plate towards the magnets is compensated by the force through the legs. Every child in class 5 learns this in their very first physics class.
[editline]04:30PM[/editline]
[QUOTE=JohnnyMo1;25191637]When you say "theoretical" I assume you mean "not experimentally verified" which in the case of quantum physics is not true in the least.[/QUOTE]
Yeah, he seems not to know much about physics, because otherwise he would know that QM and General Relativity are the best proven physical theories in mankind ever so far.
He also even seems not to know that a [b]theory[/b] in scientific meanings is the best you can get: It makes predictions to effects which have been shown later experimentally. If there is an effect this theory can't describe, the theory must be extended or replaced by an upper-class and more general theory.
[editline]04:31PM[/editline]
[QUOTE=Block;25193909]Why would you believe such a thing? Because it sounds cool?
The hypothesis about tachyons is that they travel faster than the speed of light and thus backwards in time. They have an imaginary mass.
Everything with real mass: travel slower than light
Everything with no mass: travel at the speed of light
Everything with imaginary mass: travel faster than light
Besides, I'd think tachyons are more particle physics than quantum mechanics.[/QUOTE]
I don't want to disagree with you that much but even particle physics is a quantum theory. Also Tachyons can be proposed in special relativity, a purely classical theory.
[editline]04:32PM[/editline]
[QUOTE=Cyril;25198501]Where is Avon when we need him.[/QUOTE]
Replying right under your post :)
[QUOTE=JohnnyMo1;25191618]Hahahahahaha
NO.[/QUOTE]
Because I've ever witnessed or made use of something that can't be described by standard physical laws.
Quantum computing is still far off, I think they're still making 7 qubit computers? So that's out.
The only other time I've seen this shit actually used was in a small scale environment where I think they sent election results using a quantum computer.
ITT: :psyboom:
[QUOTE=Jawalt;25199485]Because I've ever witnessed or made use of something that can't be described by standard physical laws.[/QUOTE]
Uh...Your computer.
EDIT
here we go:
[quote=wikipedia]Much of modern technology operates at a scale where quantum effects are significant. Examples include the laser, the transistor (and thus the microchip), the electron microscope, and magnetic resonance imaging. The study of semiconductors led to the invention of the diode and the transistor, which are indispensable for modern electronics.[/quote]
EDIT
[QUOTE=aVoN;25198570]
I don't want to disagree with you that much but even particle physics is a quantum theory. Also Tachyons can be proposed in special relativity, a purely classical theory.[/QUOTE]
Ah, alright. I don't mind being wrong. I encourage people to disagree, as long as they make sense.
[QUOTE=Jawalt;25199485]Because I've ever witnessed or made use of something that can't be described by standard physical laws.
Quantum computing is still far off, I think they're still making 7 qubit computers? So that's out.
The only other time I've seen this shit actually used was in a small scale environment where I think they sent election results using a quantum computer.[/QUOTE]
Things, which wouldn't exist without QM (not even invented by accident).
[list]
[*]Semi-conductors
[*]MRI-Tomography
[*]Lasers
[*]Modern chemistry and therefore a shitload of pharmaceutics.
[*]...
[/list]
Just to name a few one you might know.
QM is the most used scientific theory in mankind currently. It has an incredible influence to many different topics of physics, chemistry and other topics.
[QUOTE=Yahnich;25184410]If a bug were to be 3 centimeters in this universe, it would be 3 centimetres in another. Because metres are defined as an arbitrary length, this length would change too in the universe. So the scale would stay the same.
[/QUOTE]
It's not an arbitrary length, however it wouldn't change from universe to universe, as the scale factor would be the same.
[QUOTE=Foo King;25185000][B] IS [/B]time travel even possible?[/QUOTE]
yes and no.
In our current abillity and 3d+1 world it isnt but here is proof of particles traveling back in time and annihalating themselves ( Higgs boson). This particle can move in a plane we cannot see and therefore teleport and travel in time. This means it has acces to the 5th dimension.
Light also has some unique time *traveling* capabillities cause it stands still in time, being created at the same time it is destroyed from its own vieuwpoint.
For us it has a speed tough and for somehing to have a speed it needs to have time.
Proving time is relative.
[QUOTE=Brangus;25191356]An atom: a wave or a particle? Discuss.[/QUOTE]
Both. Quantum physics allow a paticle to be in both states at once until measured.
[QUOTE=FunnyGamer;25191448]You'd need some incredibly tough magnets to lift a person upward, and that person would need some equally impressive strength to pull the magnets away from the metal, which means more muscle which means more weight to lift which means stronger magnets which means bigger muscles etc etc.
I'm sure there's a point where you can do it but you'd need to be like 2000 pounds of pure muscle.[/QUOTE]
Imagine attaching a rope to the metal plate and trying to pull yourself up with that.
Same idea but more comprehendable.
[QUOTE=taipan;25200272]yes and no.
In our current abillity and 3d+1 world it isnt but here is proof of particles traveling back in time and annihalating themselves ( Higgs boson). This particle can move in a plane we cannot see and therefore teleport and travel in time. This means it has acces to the 5th dimension.[/QUOTE]
if we had proof of the higgs boson then what would we need the LHC for
a plane is two-dimensional so if it moves in one additional plane, it moves in two additional dimensions
having access to extra dimensions doesn't mean that it's capable of moving backwards in time
you aren't making any sense
[QUOTE=FunnyGamer;25191448]You'd need some incredibly tough magnets to lift a person upward, and that person would need some equally impressive strength to pull the magnets away from the metal, which means more muscle which means more weight to lift which means stronger magnets which means bigger muscles etc etc.
I'm sure there's a point where you can do it but you'd need to be like 2000 pounds of pure muscle.[/QUOTE]
:downs:
Nope.
Predicting uneducated posts from 12 year olds from this point on.
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