The Naked Scientists
  • Login
  • Register
  • Podcasts
      • The Naked Scientists
      • eLife
      • Naked Genetics
      • Naked Astronomy
      • In short
      • Naked Neuroscience
      • Ask! The Naked Scientists
      • Question of the Week
      • Archive
      • Video
      • SUBSCRIBE to our Podcasts
  • Articles
      • Science News
      • Features
      • Interviews
      • Answers to Science Questions
  • Get Naked
      • Donate
      • Do an Experiment
      • Science Forum
      • Ask a Question
  • About
      • Meet the team
      • Our Sponsors
      • Site Map
      • Contact us

User menu

  • Login
  • Register
  • Home
  • Help
  • Search
  • Tags
  • Recent Topics
  • Login
  • Register
  1. Naked Science Forum
  2. Non Life Sciences
  3. Physics, Astronomy & Cosmology
  4. Does Gravity do any work?
« previous next »
  • Print
Pages: 1 ... 9 10 [11]   Go Down

Does Gravity do any work?

  • 210 Replies
  • 138065 Views
  • 0 Tags

0 Members and 1 Guest are viewing this topic.

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • 81604
  • Activity:
    100%
  • Thanked: 178 times
  • (Ah, yes:) *a table is always good to hide under*
Does Gravity do any work?
« Reply #200 on: 06/02/2010 14:16:12 »
Yep I agree, it's a hard subject to really encompass :)
What I think is the problem here is how one want to see the 'origin' of particles. Depending on ones choice there are different paths. Heck, if I was to rule it would all be 'emergences' :)

Then you can see it as 'real particles' and waves as a 'extension'.
Or waves as being the 'real thing' and particles as some sort of 'concentration'.
And I don't really rule out anything, I try to keep an open mind to what's possible. So that said..

It's all 'emergences' ::))
===

Apropos electrons..
My take on the subject, and no, I don't understand them :)

Electrons and Magnetism

« Last Edit: 06/02/2010 15:07:37 by yor_on »
Logged
URGENT:  Naked Scientists website is under threat.    https://www.thenakedscientists.com/sos-cambridge-university-killing-dr-chris

"BOMB DISPOSAL EXPERT. If you see me running, try to keep up."
 



Offline JP

  • Naked Science Forum King!
  • ******
  • 3346
  • Activity:
    0%
  • Thanked: 3 times
Does Gravity do any work?
« Reply #201 on: 08/02/2010 02:48:29 »
Quote from: lightarrow on 06/02/2010 10:35:22
Quote from: Farsight on 06/02/2010 09:35:41
I hope we can all agree that the electron involves some form of rotational motion.
I see it difficult to find a generalized agreement on this...

I disagree.  Electrons have spin, but do not rotate necessarily.  There's an important distinction between the two, in that you can calculate the values angular momentum (classical rotation) can take on, and spin does not agree with those values.
Logged
 

Offline lightarrow

  • Naked Science Forum King!
  • ******
  • 4605
  • Activity:
    0%
  • Thanked: 16 times
Does Gravity do any work?
« Reply #202 on: 08/02/2010 15:49:44 »
So you agree with me in thinking that it's difficult that most of us agree about the presence of a form of rotational motion.
Logged
 

Offline Farsight

  • Sr. Member
  • ****
  • 396
  • Activity:
    0%
Does Gravity do any work?
« Reply #203 on: 08/02/2010 23:50:50 »
Oh come on, JP. Go with the flow. Look at http://en.wikipedia.org/wiki/Zitterbewegung:

Zitterbewegung (English: "trembling motion", from German) is a theoretical rapid motion of elementary particles, in particular electrons, that obey the Dirac equation. The existence of such motion was first proposed by Erwin Schrödinger in 1930 as a result of his analysis of the wave packet solutions of the Dirac equation for relativistic electrons in free space...

There's some kind of rotational motion in there, whether you consider it to be classical or not, and despite your lack of an electron model. Now, can we move on to gravitational potential energy? It's really very simple. 
Logged
 

Offline Geezer

  • Naked Science Forum King!
  • ******
  • 8314
  • Activity:
    0%
  • Thanked: 8 times
  • "Vive la résistance!"
Does Gravity do any work?
« Reply #204 on: 09/02/2010 00:48:55 »
Quote from: Farsight on 04/02/2010 11:14:38
Geezer: my response would be some restatement of what I said previously about the ambiguous definition of work and the distinction between classical mechanics and relativity, so I don't think there's any more I can add.


Does that mean, in classical terms, you agree that gravity does do work?
Logged
There ain'ta no sanity clause, and there ain'ta no centrifugal force æther.
 



Offline lightarrow

  • Naked Science Forum King!
  • ******
  • 4605
  • Activity:
    0%
  • Thanked: 16 times
Does Gravity do any work?
« Reply #205 on: 09/02/2010 19:38:54 »
Quote from: Farsight on 08/02/2010 23:50:50
Oh come on, JP. Go with the flow. Look at http://en.wikipedia.org/wiki/Zitterbewegung:

Zitterbewegung (English: "trembling motion", from German) is a theoretical rapid motion of elementary particles, in particular electrons, that obey the Dirac equation. The existence of such motion was first proposed by Erwin Schrödinger in 1930 as a result of his analysis of the wave packet solutions of the Dirac equation for relativistic electrons in free space...

There's some kind of rotational motion in there, whether you consider it to be classical or not, and despite your lack of an electron model. Now, can we move on to gravitational potential energy? It's really very simple. 
How many physicists can still believe in Zitterbewegung? Maybe you can found some at the waxwork...
Logged
 

Offline Farsight

  • Sr. Member
  • ****
  • 396
  • Activity:
    0%
Does Gravity do any work?
« Reply #206 on: 10/02/2010 08:24:06 »
Geezer: in classical terms, yes. But not in terms of relativity.

lightarrow: all of them. See http://physicsworld.com/cws/article/news/41352

"European physicists have won the race to observe zitterbewegung, the violent trembling motion of an elementary particle that was predicted by Erwin Schrödinger in 1930. To observe this phenomenon, the team simulated the behaviour of a free electron with a single, laser-manipulated calcium ion trapped in an electrodynamic cage..."

I take it that everybody is now satisfied that there's some kind of rational motion in a subatomic particle like an electron. At point A up in space this occurs at rate X, but because of gravitational time dilation, at point B down on the surface of a planet it occurs at rate Y, which is less than X. This means the subatomic particle has less energy at point B.
Logged
 

Offline dantheman

  • First timers
  • *
  • 5
  • Activity:
    0%
Does Gravity do any work?
« Reply #207 on: 11/02/2010 14:46:28 »
How’s this from someone who knows very little science.
The way I see is that a mass of matter causes a rift in the fabric of space, pushing it out to make room for it’s self. Therefore causing things to attempt to fall in. The larger the mass (not the size) the larger the rift. With black holes being so massive that they achieve a tear rather than a rift. Gravity does not work only the mass does.

Logged
 

Offline JP

  • Naked Science Forum King!
  • ******
  • 3346
  • Activity:
    0%
  • Thanked: 3 times
Does Gravity do any work?
« Reply #208 on: 12/02/2010 02:51:50 »
If anyone wants to discuss more about the electron model, could you start a new thread please?  It's really confusing the original question.  If not, I'll have to split further electron posts off this thread.

Thanks,
JP (mod)
Logged
 



Offline lightarrow

  • Naked Science Forum King!
  • ******
  • 4605
  • Activity:
    0%
  • Thanked: 16 times
Does Gravity do any work?
« Reply #209 on: 12/02/2010 15:56:35 »
Quote from: Farsight on 10/02/2010 08:24:06
Geezer: in classical terms, yes. But not in terms of relativity.

lightarrow: all of them. See http://physicsworld.com/cws/article/news/41352

"European physicists have won the race to observe zitterbewegung, the violent trembling motion of an elementary particle that was predicted by Erwin Schrödinger in 1930. To observe this phenomenon, the team simulated the behaviour of a free electron with a single, laser-manipulated calcium ion trapped in an electrodynamic cage..."
"According to Christian Roos at the University of Innsbruck, Austria, one of the keys to success was to make their non-relativistic ion behave as if it was a relativistic particle. This is crucial because zitterbewegung is predicted by the Dirac equation, which describes relativistic quantum mechanics".

Note the phrase: to make their non-relativistic ion behave as if it was a relativistic particle.
Logged
 

Offline JP

  • Naked Science Forum King!
  • ******
  • 3346
  • Activity:
    0%
  • Thanked: 3 times
Does Gravity do any work?
« Reply #210 on: 14/02/2010 07:03:11 »
Splitting this is going to be a huge headache, so if you don't mind I've put up a question here about electron rotation:
http://www.thenakedscientists.com/forum/index.php?topic=28707

Thanks,
JP (mod)
Logged
 



  • Print
Pages: 1 ... 9 10 [11]   Go Up
« previous next »
Tags:
 
There was an error while thanking
Thanking...
  • SMF 2.0.15 | SMF © 2017, Simple Machines
    Privacy Policy
    SMFAds for Free Forums
  • Naked Science Forum ©

Page created in 0.361 seconds with 49 queries.

  • Podcasts
  • Articles
  • Get Naked
  • About
  • Contact us
  • Advertise
  • Privacy Policy
  • Subscribe to newsletter
  • We love feedback

Follow us

cambridge_logo_footer.png

©The Naked Scientists® 2000–2017 | The Naked Scientists® and Naked Science® are registered trademarks created by Dr Chris Smith. Information presented on this website is the opinion of the individual contributors and does not reflect the general views of the administrators, editors, moderators, sponsors, Cambridge University or the public at large.