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Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. Again, for some odd reason, people...
Apr22-11 05:26 AM
ZapperZ
1 46,693
By definition total energy of a system= (internal energy U) + K.E + P.E and mechanical energy of a system= (flow...
Apr29-12 01:14 AM
Ritz_physics
0 503
if an electric charge pops into space it's electromagnetic field is constituted everywhere in space instantaneously...
Jan2-09 09:08 AM
Vanadium 50
7 859
Does any one know of a constitutive equation for a an orthotropic temperature-dependent material that has different...
Oct1-13 08:06 PM
JTVT
0 349
I am trying to define the stress strain relationship for a viscoelastic material. For a Maxwell model, I have the...
Jan2-11 07:59 PM
Mapes
1 4,612
I've read conflicting descriptions of the relationship between constraint forces and virtual displacements that I'd...
May4-12 12:49 AM
ralqs
0 686
Hi! I tried to compute an ideal barbell-shaped object's dynamics, but my results were wrong. My Langrangian is: ...
Jun16-13 08:36 AM
Jengalex
2 538
In the textbook photonics 6 chapter 1 Example 1.1.1 saleh and Teich , I'm supposed to derive snell's law using...
Oct8-11 12:01 PM
med17k
0 955
could you please tell me how can the accelaration of masses m1 and m2 can be different. i am in a great necessity.so...
Oct9-11 05:42 PM
Pi-Bond
2 2,122
Can questions like the one given in the following pic be solved by taking the reference frame answhere in the middle...
Jul31-10 09:41 PM
sid95
2 1,992
Can gravitation be a constraint force?
Feb9-13 01:39 PM
DaleSpam
1 567
the fundamental basis of the lagrangian formulation is the fact that the virtual displacement are perpendicular to the...
Sep17-08 01:27 PM
Machinus
4 15,176
Suppose you are trying the solve the equation of motion of say a particle constrained to move on a surface...
Jul10-12 04:33 PM
supernova1387
1 894
when a particle is constraint to move on a circle, what are the constraint forces
Feb2-11 02:41 PM
Studiot
12 1,373
http://m.youtube.com/watch?v=8X1x9RLaaxc he tells number of contraints (he write no of pairs ) is nC2 how is it, i...
Oct25-13 02:07 AM
DrClaude
7 660
the question is if we have the constraint: g(q,p)-C=0 for a real number C then we have that derivating this...
Jan18-07 06:31 AM
Kevin_spencer2
0 1,863
My question is about the constraints in Hamiltonian viewpoint. I mean, where the constraints are put into the...
Oct11-07 11:53 AM
somy
2 2,340
Hello, all. I'm wondering about matrix-variate normal distributions. I know they normally assume an n x p random...
Jul12-12 02:49 PM
jssdenton
0 593
Is it possible to construct a hall effect transducer without the use of p-type semiconductors? I've been looking into...
Nov26-11 01:41 PM
tummychow
2 2,499
Hello: I am trying to understand how to build a hamiltonian for a general system and figure it is best to start...
Aug10-11 01:31 PM
mathfeel
4 2,247
Well, it's more or less for robot constructon thing. Does anyone know if it's possible to construct a small EMP device...
Oct31-04 01:36 PM
Zeteg
4 4,367
Consider two identical optic fibers with deeply subwavelength tips. Let their tips be placed next to each other, at a...
Sep11-10 09:17 AM
Dr Lots-o'watts
20 2,623
Can anyone explain point 44 of the attached pdf document on surface tension. (Here's the link in case attachment...
Jan27-13 07:06 AM
andrien
1 532
Can anyone explain point 44 of the attached pdf document on surface tension. (Here's the link in case attachment...
Feb15-13 09:56 AM
amk_dbz
0 466
Hi, when two cylinders in contact, but not parallet to each other (skewed), are rotating, there is a development of...
May17-07 11:56 PM
Luiz Cavatte
2 1,898
The maximum I have found about contact force is very roughly this: it is nothing but electromagnetic force, meaning...
Nov6-08 08:47 AM
Andy Resnick
2 1,488
What kinds of tanks are capable of resisting these types of pressures? (30,000 psi). I can't find any tanks that...
Dec28-04 06:25 PM
brewnog
25 4,880
Hey guys, First time posting. I was thinking of starting an extra credit paper for my Physics 1A course, and was...
Nov8-11 09:57 PM
Dickfore
1 1,203
How do you solve the following problem: You are in charge of keeping the drinks cold for a picnic. You have a...
Jul20-12 04:50 AM
mfb
1 593
I apologize in advance for the length of this post, if you wish to reduce reading skip to paragraph 5. Or if you are...
May19-13 12:13 PM
Cameron Blake
9 733
Hi Friends, consider a pipe of uniform cross section held vertical and water flows through it top to bottom. Now if...
Mar11-10 12:20 PM
tiny-tim
18 1,765
Imagine a jet of fluid (perhaps air) impinging on a flat plate. It could be said that the jet has a slightly higher...
Jun4-09 07:38 AM
parsec
1 1,304
Hi all, first post here.. I hope you guys can point me in the right direction. I am writing a multiplayer game and...
Jun9-05 02:33 AM
kunos
0 1,179
I have a question about the derivation of the boundary conditions at surfaces of electromagnetic fields. These...
Mar10-13 01:59 PM
jasonRF
1 618
Although continuity equation is often part of fluid mechanics, does it have an application in air flow? For example,...
Jun20-13 07:31 AM
boneh3ad
3 573
Greetings, In Griffiths E&M, 3rd. Ed., on page 214, the following is part of the derivation of the continuity...
Sep17-13 11:08 AM
Chestermiller
6 666
Please consider a U-tube filled with an incompressible fluid as in the attached figure. Piston P divides the fluid in...
Sep23-08 10:39 PM
rupam_iit
6 2,573
Quantities, like photons, alpha/beta particles, can travel with a billiard ball like behavior. There are two...
Aug19-09 03:22 AM
John Creighto
0 591
Hello I have found in some text books that the magnetic scalar potential is continuous across a boundary. Now, how...
Oct17-11 07:37 AM
baggiano
2 1,552
Suppose that we will proof the continuity of the first maxwell equation: So we have div(\vec{E})=\frac{1}{\epsilon...
Nov3-07 09:46 AM
Bert
2 2,348
I have followed a derivation of the continuity equation, and it uses the divergence theorem at some point, but looking...
Mar14-09 07:47 AM
ballzac
4 2,243

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