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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
1 47,892
Hey guys I'm looking for. Some more info on eddies current. I understand how it works but all the examples I see use...
Jul13-14 11:06 AM
2 733
I want to calculate the field distortion caused by placing a conducting spheroid in a uniform electric field. The...
Jul13-14 04:42 AM
2 721
I am working with a single mode fiber at 830 nm with a NA of 0.12...
Jul13-14 12:10 AM
1 911
How is electromagnetism different from gravity in that accelerated objects radiate EM waves when accelerated in an...
Jul12-14 05:39 PM
8 1,113
this is a homework problem i realized after posting it. so could a moderator please move this question to the hw...
Jul12-14 04:54 PM
1 684
This is related to classical Hamiltonian mechanics. There is something wrong in the following argument but I cannot...
Jul12-14 05:46 AM
1 798
What are your opinions about these two experiments described at: Can they be used to...
Jul11-14 01:45 PM
5 828
I am trying to understand why I can specify the specific volume v of a fluid element as a function of the equilibrium...
Jul11-14 12:34 PM
3 847
This is a problem I thought up. If I'm correct as far as I've gone, the answer is rather surprising. A thin but...
Jul11-14 12:26 PM
16 1,772
I understand that when an electron is excited it goes to a higher energy level and then relaxes to ground state...
Jul11-14 11:57 AM
1 646
Hello, Been a while since I posted on here, nice to be back :) . I just want some pointers as to the methodology...
Jul11-14 08:45 AM
Mech King
3 948
I have come to learn that the Doppler shift equation is asymmetric. That is, the Doppler shift is not the same when...
Jul11-14 07:47 AM
7 777
We know that the main use of capacitor is to store charge in the form of electric field,and we want it to store as...
Jul11-14 01:44 AM
1 669
I feel I understand what happens, and how to solve the equation of motion x(t) for a mass attached to a spring and...
Jul10-14 06:19 PM
Edge Of Pain
7 933
The power density of an electromagnetic wave is proportional to the absolute square of the electric field |E|^2...
Jul9-14 09:05 PM
Andy Resnick
2 1,590
Please help me qualitatively in the following points : 1) If in a system(consider a cylinder) fixed with a piston ,...
Jul9-14 11:14 AM
Philip Wood
2 908
hai friends, i would like to know what would happen to three isolated point separated by infinite...
Jul9-14 09:39 AM
1 867
Hi, I have a question I'd like some help with which is related to my job working with drill rigs. Where you have...
Jul9-14 07:43 AM
6 1,130
Why do we take Θ=90° for calculation of potential energy
Jul9-14 06:11 AM
1 905
Hello! It has been years since I had physics at uni, and I have forgotten lots of it, so I need some help here. The...
Jul8-14 01:20 PM
0 801
I know that in the vector potential formulation one can use a scalar Green function (to find the said potential and...
Jul8-14 12:50 PM
3 1,287
Hi guys, I hope this is the correct section otherwise I apologize :).The goal is to find the capacity of a non linear...
Jul8-14 10:15 AM
6 849
I'm looking to find the resultant force of three forces and a moment: Fx, Fy, Fz, and Mx. I intend to graph multiple...
Jul8-14 06:07 AM
2 976
Hi all, I am looking into induced electric fields by changing B fields inside layers of dielectric. For example, if...
Jul8-14 05:13 AM
10 1,278
I tried to make the title as descriptive as I could without being overly long. Anyway, I've been trying to work...
Jul7-14 11:12 PM
6 2,280
Hello. I have a question about experiment. You know it. You need beer bottle, water and ping pong ball. You...
Jul7-14 10:56 PM
1 786
Are these two, wave number and wave mode, same thing? If not, what is the difference? Thanks...
Jul7-14 09:00 PM
Simon Bridge
10 1,426
Hi I'm trying to model the drag effects in using Lagrange Mechanics and trying to include the effects of...
Jul7-14 04:45 PM
1 1,286
Hello Physics Forums I need a little help wrapping my head around the concept of lambertian emitters as compared to...
Jul7-14 04:41 PM
1 920
Finding the magnetic field for a straight wire using the right hand rule shows that the field is around the wire. ...
Jul7-14 02:15 PM
1 738
Greetings, I have two semi-related questions. 1. When making the Lagrangian formalism of electrodynamics, why is...
Jul7-14 01:33 PM
HJ Farnsworth
2 924
Does a point charge 'q' (say an electron) moving with constant angular speed ω in a circle of radius R constitute a...
Jul7-14 12:54 PM
Vanadium 50
17 1,201
I have a Fresnel lens which is equal-ant to a Plano Convex lens, Consider object on one side and my eye is on the...
Jul7-14 07:11 AM
3 364
So a cube submerged in water will experience pressure on all six sides, and the pressure on the bottom will be greater...
Jul7-14 06:51 AM
8 784
i was told that progressive waves has no nodes, why is it so? can anyone here explain please?
Jul7-14 04:30 AM
Simon Bridge
1 283
If I hold the top end of a straw filled with water, the water stays in the straw which is due to the atmospheric...
Jul7-14 12:56 AM
Simon Bridge
3 409
Hi guys. I hope this isn't a bad place to post my question, which is: I'm reading some lecture notes on Lagrangian...
Jul6-14 10:38 PM
4 480
So the formula is F=Gm1m2/r^2. Could you substitute one of the mass values for an energy value since gravity attracts...
Jul6-14 09:32 PM
6 449
Hey guys, I don't know if here is the right section for this question but anyway. So I was looking for the proof or...
Jul6-14 08:54 PM
1 494
I am facing difficulty in understanding a key point . Hence I am putting it here instead of Introductory Physics...
Jul6-14 12:32 PM
11 1,473

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