The Naked Scientists

The Naked Scientists Forum

Author Topic: Is this a new paradox of energy?  (Read 27302 times)

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • Posts: 12001
  • Thanked: 4 times
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
Is this a new paradox of energy?
« Reply #100 on: 06/03/2011 04:32:03 »
"Gravity cannot be shielded in any way. Intervening objects, whatever their make-up, have no effect whatsoever on the attraction between two separated objects. This means that no antigravity chamber can be built in the laboratory. Neither does gravity depend on the chemical composition of objects, but only on their mass, which we perceive as weight (the force of gravity on something is its weight — the greater the mass, the greater the force or weight.) Blocks composed of glass, lead, ice or even styrofoam, if they all have equal mass, will experience (and exert) identical gravitational forces. These are experimental findings, with no underlying theoretical explanation."  Eötvös experiment.

Gravity permeates SpaceTime, as I see it even when undetectable. That quantum field theories want to find a 'particle' has very much to do with the idea of 'discrete quanta' defining SpaceTime in QM.
==

This one is Interesting too.
==

As we might have had a inflationary period, and if gravitation 'propagates' at 'c' you might wonder if there then could be 'areas' without gravity. No, there can't be, not if gravity is one of the properties (yeah, I know, but it's better than calling it a 'force':) defining SpaceTime. But if gravity would be just a property of mass and 'space' be something uncoupled to gravity you might assume that such areas could exist. And as Space is thought to be isotropic you could then find those areas 'symmetrically' placed out everywhere. Which makes no sense to me :) But.. To do so you would have to assume that space was a entity of its own, only coupled, if that, to time. But not really, as a inflationary period seems to exclude time, well, as long as we're not ready to assume that 'everything' was Lorentz contracted at that point? But if it was so we have a very weird idea as a infinite, more or less, Lorentz contraction implies no 'distance' at all for the inflation, and opens for the question for whom it would have become a 'distance'?

But it's interesting :)
« Last Edit: 06/03/2011 05:12:28 by yor_on »
 

Offline Geezer

  • Neilep Level Member
  • ******
  • Posts: 8328
  • "Vive la résistance!"
    • View Profile
Is this a new paradox of energy?
« Reply #101 on: 06/03/2011 19:10:52 »
"how do you explain what is doing the work on the generator"

The water :)

It has to do with matter (water) free falling in a geodesic, following the gravitational potential. And as it get obstructed by the impellers, interacting with them, delivering the 'kinetic energy'. Gravity is no force in itself, but matters interactions under its influence is.

Or you go for Newtons concept.
Your choice, I'll stay with my geodesics.

Ah, right. So is it true to say that matter interacting with other matter at a distance does the work then? (Avoiding the use of Newtonian terms)

(I bet you can see where this is going ;D)
 

Offline syhprum

  • Neilep Level Member
  • ******
  • Posts: 3823
  • Thanked: 19 times
    • View Profile
Is this a new paradox of energy?
« Reply #102 on: 06/03/2011 20:13:46 »
Although on a practical level it is quite true to say that no shielding against gravity is possible if in fact it is mediated by Gravitons and they have non zero mass some shielding must be possible.
It is has not been proven that the mass of the graviton is less than 10-23 eV something like 23 orders or less than that of the Neutrino against which some shielding is possible but only by vast amounts of very dense materiel. 
 

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • Posts: 12001
  • Thanked: 4 times
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
Is this a new paradox of energy?
« Reply #103 on: 06/03/2011 23:04:55 »
Yes, Gravitons are one of the pillars of string theory too it seems. We will have to wait and see what LHC can 'dig up' :)

"matter interacting with other matter... At a distance?" :)
Explain thyself Sire :)
 

Offline Geezer

  • Neilep Level Member
  • ******
  • Posts: 8328
  • "Vive la résistance!"
    • View Profile
Is this a new paradox of energy?
« Reply #104 on: 07/03/2011 00:33:13 »
"matter interacting with other matter... At a distance?" :)
Explain thyself Sire :)

Isn't that what produces the analgesic of which ye speak, that causes the Moon to remain in the general vicinity of Earth?
« Last Edit: 07/03/2011 04:25:19 by Geezer »
 

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • Posts: 12001
  • Thanked: 4 times
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
Is this a new paradox of energy?
« Reply #105 on: 07/03/2011 11:31:52 »
So we are looking at it through the eyes of dentistry now, are we?
'analgesic' indeed Sire :)
 

Offline Geezer

  • Neilep Level Member
  • ******
  • Posts: 8328
  • "Vive la résistance!"
    • View Profile
Is this a new paradox of energy?
« Reply #106 on: 07/03/2011 19:14:50 »
So we are looking at it through the eyes of dentistry now, are we?
'analgesic' indeed Sire :)

No. Only if we consider it to be geodontic.
 

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • Posts: 12001
  • Thanked: 4 times
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
Is this a new paradox of energy?
« Reply #107 on: 07/03/2011 21:52:55 »
Geochelones and geoducks, in the end it's all a matter of geodesics. No matter where you are :)
 

Offline JP

  • Neilep Level Member
  • ******
  • Posts: 3366
  • Thanked: 2 times
    • View Profile
Is this a new paradox of energy?
« Reply #108 on: 08/03/2011 02:07:10 »
Is Geozer being curmudgeonly again?
 

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • Posts: 12001
  • Thanked: 4 times
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
Is this a new paradox of energy?
« Reply #109 on: 08/03/2011 02:16:59 »
Nah, under his hardened crust resides a sunny personality.
Geophysically speaking :)

"salt of the earth' as we say, orbitaling.
 

The Naked Scientists Forum

Is this a new paradox of energy?
« Reply #109 on: 08/03/2011 02:16:59 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums