
The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...

Dec3107 02:06 AM
jtbell

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41,904 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:40 AM
ZapperZ

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This is a diversion from the "Interesting energy problem" thread. That thread lost its direction a bit lost due to...

Jul711 03:39 PM
Qreeus

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I don't know if I am posting this in the right section, I am still figuring these boards out.
Could someone explain...

Oct605 08:02 PM
robousy

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I know that folding spacetime is completely possible, and i'm pretty sure that the answer i'm looking for is in...

Jul810 07:13 PM
bcrowell

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Hi all,
I began to read this paper :cosmology
On page 9 the author foliates spacetime into spatial hypersurfaces, ...

Apr1009 01:17 PM
naima

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735 
Hello,
Anyone has figure or web site which illustrates how foliation of space time hypersurfaces look like or what...

Jan1211 04:58 PM
berkeman

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3,680 
Isham wrote:
http://arxiv.org/PS_cache/grqc/pdf/9310/9310031v1.pdf
When we come to a Diff(M)invariant theory...

Dec2211 10:51 AM
exponent137

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2,066 
I'm familiar with how one foliates, say, a fourdimensional spacetime (\mathcal{M},g) so that one can identify it as a...

Dec2006 02:04 AM
coalquay404

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2,351 
Here goes a conceptual question that has been bugging me:
Consider the famous eclipse experiment that shows the...

Nov2313 08:25 AM
Naty1

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I've been reading Melvin Schwartz's mostly excellent book, Principles of Electrodynamics. He has a section on...

Dec1907 09:29 AM
GreenPenInc

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Is there a way to define via Geommetry or other concept the quantities we call "Force" and "potential"?..in the same...

Sep506 02:11 PM
pervect

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Hello
When I had relativity course and I read some books and sources like : Rindler W. Relativity.. special,...

Sep2209 01:21 PM
javierR

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774 
1.) The tests of falling bodies in a frame under constant acceleration prove all masses accelerate to the floor at the...

Apr2308 08:40 AM
Chrisc

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Hi,
Does the magnitude of the force change when the frame moves with a high speed with respect to another frame at...

Aug1313 02:47 AM
harrylin

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Say we have identical masses side by side low down in a strong gravitational field. We attach ideal massless cords to...

May3112 04:37 PM
PeterDonis

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Lets start over and let me rephrase my question, a force due to gravity permeates the area around it with time...

Oct1810 05:21 PM
pervect

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When considering the Newtonian forces, it's somewhat intuitive to think about the equilibration of forces, e.g. two...

Jul712 09:49 AM
Bill_K

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674 
Well what is the apparent force applied on two bodies of mass m1 and m2 due to Cosmological Constant?
First of all,...

Apr2210 02:44 PM
bapowell

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994 
Hi...
Please can anyone explain me why we can talk about force in special relativity? I thought that special...

Feb1507 06:31 PM
rbj

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1,893 
In SRT, Force (F) transforms identically to d(mV)/dt, which can in turn be transformed using the Lorentz...

Jun2411 10:22 PM
pervect

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The Lorentz force transformation (or the transformation of d(mv)/dt) is well known. Should all force laws (Hooke,...

Feb610 09:28 AM
GRDixon

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How can we calculate force of gravity between two objects using Einstein's relativity theory. Using Newton's method we...

Mar2912 06:14 PM
pervect

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875 
Can a massless classical particle experience a nonzero Newton's second law force?
Dickfore produced a very...

Jul1511 07:38 AM
atyy

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1,242 
Okay because my previous post of similar kind was I guess rather too full of thought experiments and ideas that nobody...

Aug2113 04:08 PM
Simon Bridge

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704 
Consider some material object, more or less rigid, with two ends, A and B, like
AB
It is at rest at a point...

Dec2707 06:07 PM
pervect

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1,995 
I know that there is an equation for an accelerating object that is already a notable fraction of the speed of light...

Nov213 12:01 AM
pixelpuffin

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Difficult to explain this question but i will try, Space is expanding
and un gravitationally bound matter is carried...

Feb1805 10:55 AM
chronon

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Maybe this should be in the classical physics section, but there is a connection with GR so I'm posting here.
I've...

Sep208 08:24 PM
Mentz114

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2,092 
I am thinking about train paradox here. The only difference between the passenger and the person waiting at the...

May2111 11:38 PM
ZealScience

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Consider two point charges in space: one positive(+Q) and other negative(Q), lying on the yaxis and separated by...

Jul411 10:02 AM
lovetruth

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Does anyone have any references in the literature that talk about interpreting forces as Christoffel symbols?
...

Dec1111 10:54 PM
atyy

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1,805 
To avoid hijacking an existing thread, I wanted to start a new one on how "gravitational forces" are represented in...

Jul2912 07:39 AM
Mentz114

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Let's tie a rope on an object, then we swing the object around in a circle, then we start running forwards while...

Oct2713 07:07 AM
DaleSpam

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I was wondering why can't I use formulas from the "Special Relativity" in cases like:
F=mv^2/r Or F=qv•B...

Jul2214 12:56 AM
ghost313

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I am attemting to help my son with a Physics problem, and it has been 20 years since my last Physics class. I would be...

Feb904 06:49 PM
Bigniko

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In my general relativity class my professor derived the form of the KruskalSzekeres form of the Schwarzschild metric...

Oct1912 02:25 PM
Airsteve0

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This is a fairly trivial question I think. I'm only asking it here because after some googling I was unable to find...

Aug1412 07:26 PM
LittleSailor

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Considering how the various forms of equivalence principle can lead to ambiguous discussions, I would like to know if...

Jan1507 10:24 AM
Crosson

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1,768 
i am read a paper of name: "formalism for an extended object"(in spanish)..
a sub manifold of coordinates y^i...

Nov1809 05:11 PM
alejandrito29

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Does anyone have any information on this experiment involving Einstein's prediction of the speed of gravity? Was it...

Feb607 07:40 AM
Satie

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Hello;
I know that the formula for density is mass/volume. However, this is only true for rest mass. What about...

Mar1710 02:44 AM
FeDeX_LaTeX

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