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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 47,893
Everyone here should be familiar with the office toy known as Newton's Cradle where a ball collides with a group of...
Jan13-10 10:11 PM
Prologue
8 10,178
I am trying to understand how the concept of moment was introduced in physics. For example I don't understand how the...
Jan9-10 05:21 AM
tiny-tim
7 4,051
Hi I am trying to work through the solution to the attached problem (see attachments). Now, I can't understand...
Jan8-10 05:43 PM
vertices
17 2,457
Dear all, As I understand the venturi effect, if a flow of water passes through a constriction, its velocity...
Jan13-10 01:38 PM
amrbekhit
1 15,595
Hi. There is just this one thing in mechanics which is lagrangian that I just simply can't grasp physically. I'm...
Jan9-10 02:43 PM
fluidistic
13 1,037
I have a motor I wish to evaluate. I wish to measure the Joules input and output. I believe I am making several...
Jan10-10 05:16 AM
nickec
5 1,414
In general what does a Lagrangian for a system consisting of interacting fields and particles look like? It can't...
Jan9-10 09:26 AM
pellman
1 740
I understand why a heavy item and a light item both fall a given distance in the same time - in a vacuum, etc. What...
Jan11-10 06:58 AM
Gerenuk
3 1,012
Looked at Maxwell's eqns after quite some time,and was wondering, what happens if we apply an alternating flux to a...
Jan10-10 11:05 AM
GRDixon
4 2,081
Gentlemen, I am a retired (after 35 plus years) secondary, college art teacher. For the last eight years I have...
Jan10-10 02:27 AM
Danger
13 6,611
Hi. I'm beginning to study thermodynamics. I'm told that an adiabatic process is a process that is thermally...
Jan11-10 08:40 AM
DocZaius
12 2,167
Hello everyone. Que: Is there a reason for water flowing from a faucet to be narrower at the bottom then the top??...
Jan10-10 11:26 AM
Prologue
4 902
Consider that we have ice and water together ( no heat exchange with surrounding ) and qi1 = heat required by ice to...
Jan9-10 06:13 AM
HallsofIvy
1 1,082
is the distance between electrons in an electron beam constant
Jan9-10 07:07 AM
ZapperZ
1 639
Hello Does anyone know where can I find a derivation (or approximation) for Huygens principle from more "basic"...
Jan12-10 02:01 AM
Claude Bile
7 1,805
I'm setting up an experiment where I have a circular cathode releasing electrons to an outer circular anode. The tube...
Jan10-10 03:46 PM
Bob S
6 2,765
first off, sorry if this isn't the correct section for this question maybe if it's not, someone could move it to a...
Jan9-10 04:57 PM
free-node-5
0 942
I know this is getting really ridiculous but I have yet another question on Lagrangians... This is our Lagrangian:...
Jan12-10 01:13 AM
diazona
5 1,040
Hi. I'm a student in AP Physics this year and we started the E&M portion this week and we learned about electric...
Jan10-10 04:23 PM
Durin
6 2,997
(Sorry for my poor English, Please, forgive mistakes, if any.) Dear Friends Not doubts about what is to be meant...
Jan11-10 07:51 AM
BarbaraDav
5 1,261
Let's assume that electron is moving around the unit circle. Using Maxwell equations show what is the frequency of...
Jan11-10 10:07 AM
GRDixon
6 661
Please see the attachment. There I have derived Kirchhoff's Voltage law from Faraday's Induction law. Reply me if I...
Jan11-10 09:53 AM
emroz92
4 1,167
If we have a Lagrangian which looks like this: L=\frac{m}{2}g_{ij}(x)\dot{x}^i\dot{x}^j where: ...
Jan11-10 12:41 AM
Prologue
5 871
I have an electrode that I'm trying to model. It's got v=0 at z=0, and v=V at z=H. I've been playing around with the...
Jan12-10 06:19 AM
clem
2 1,748
If a force is applied to an object, will the object always experience the same linear momentum change regardless of...
Jan11-10 07:35 PM
Gerenuk
9 4,251
If Light is EM wave, and antenna can emit EM wave, then can an antenna emit light? Is this a matter of designing the...
Jan11-10 12:19 AM
saltine
2 806
Say you have a charge distribution in the picture, and you want to find the potential THEN the electric field at P,...
Jan11-10 07:52 AM
Identity
4 792
Set-up Closed tube with a hole at each end. Microphone at one end attached to computer. Clap noise made at the other...
Jan12-10 05:23 AM
Stonebridge
1 2,464
I'm interested in calculating the capacitive current when the electric field across a capacitor is given by a random...
Jan11-10 05:36 PM
berkeman
3 2,907
inertia is the state of an object at rest and a body in motion will move at constant velocity unless influenced by an...
Jan12-10 03:16 PM
GRDixon
3 910
If you have a sphere of metal electrically isolated by a vacuum, and continuously add negative charge to it, the metal...
Jan11-10 09:24 PM
Born2bwire
1 901
(Sorry for my poor English, Please, forgive mistakes, if any.) Dear Friends A system of second order, in normal...
Jan12-10 08:40 AM
BarbaraDav
0 1,151
When an apple falls to the ground does it not exert some gravity of it's own on the earth and thus shortening the...
Jan12-10 11:04 AM
mtasquared
3 647
I asked my professor, but he had no idea. Not really important, I guess, but I'd like to know.
Jan12-10 10:36 AM
supijt
0 3,097
Hi. I differentiated the equation of kinetic energy E(v) = \tfrac{1}{2} mv^2 and I got: E'(v) = mv.
Jan12-10 04:04 PM
GRDixon
8 8,382
Hi, I understand that a conservative force cannot depend on velocity, because by changing velocity we can do different...
Jan13-10 01:24 PM
Gaudium
2 627
In the attachment, I have tried to bring out Doppler effect a bit differently than our normal textbooks. Please see...
Jan13-10 01:45 PM
emroz92
0 830
I have to design a small aerator in the middle of a larger project . Therefore I need to have some design equations. ...
Jan13-10 02:21 PM
Derulz
0 591
Hi Everyone, I'm trying to find the eigenfunctions and eigenvalues for a quantum spinless particle within two...
Jan13-10 07:21 PM
aurelio
0 732
i am now reading the book by goldstein on classical mechanics classical mechanics is always a difficult subject for...
Jan14-10 04:03 AM
wdlang
0 746

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