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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 47,684
force between two charges is it electric force or electromagnetic force? And force between the atom nucleus and the...
Aug24-08 03:00 AM
2 1,228
An antenna behaves like an RCL circuit. The R is the radiation resistance corresponding to energy actually radiate....
Aug23-08 06:36 PM
2 3,739
Hello: In Classical mechanics, the lagrangian of a system is defined as the kinetic energy minus the...
Aug23-08 05:55 PM
1 1,238
I'm trying to solve the question b) in this link My reasoning is dK = dm v^2...
Aug23-08 10:12 AM
1 1,549
Hi this is my first post here so I hope it's in the right place! I am doing a computer course and we are using...
Aug22-08 09:58 PM
0 1,956
Dear All, Please excuse my ignorance of physics. According to some Russian research 1 mW of microwave radiation could...
Aug22-08 07:18 PM
3 1,552
Hello, please forgive my ignorance. I need help coming up with a formula I can't seem to find on the internet. ...
Aug22-08 02:57 PM
1 1,283
Starting with the equation of motion -kx = ma , it is said that integrating this with respect to x gives the equation...
Aug22-08 11:18 AM
2 2,014
How would I go about calculating the resonant frequency of a tube with a slit cut out from its length. I'm looking for...
Aug22-08 11:04 AM
0 1,020
prove this claim in landau ... Closed systems have lagrangians which do not contain time explicitly
Aug22-08 08:33 AM
0 1,242
It is a well-known consequence of classical electromagnetism that any accelerating charged particle must radiate (not...
Aug21-08 05:35 AM
Shooting Star
24 5,383
Hello, I want to know how long time a running runner needs to reach a point, when he is initially running in the...
Aug21-08 03:03 AM
0 1,217
Hi. What is a ¨charge¨ ? What does it mean that an electron has a negative charge? What is modified in particle...
Aug20-08 10:56 PM
1 970
Im trying to calculate energy of the turbines to lift an airplane , by this way, calculating potential energy...
Aug20-08 10:49 PM
6 1,759
According to Coulomb's law we have that the force between two charged particles could be described by (1)~~~F = k...
Aug20-08 03:59 PM
35 4,376
So I was doing this one problem in which there is a sphere of radius r and charge density row and there is a spherical...
Aug20-08 10:21 AM
15 2,573
Dear Experts, Are there any effects that could be induced with electrity in a microgravity environment that can...
Aug20-08 07:29 AM
Andy Resnick
1 1,369
I am doing an experiment on the pendulum, and i wanted to do something on the damping, i understand a little as i have...
Aug20-08 06:29 AM
3 2,156
I have a statics question. In my book under a picture it says. "To save material the beams used to support the...
Aug20-08 02:18 AM
5 1,660
Hello, good afternoon. I would ask you for the help of my work in physics. As you well understand, I'm not North...
Aug19-08 01:21 PM
6 2,711
hi..i'm an undergraduate student.i'm working on my final year project. i've been looking for the permittivity and...
Aug19-08 11:59 AM
2 1,249
Hey all, Just a bit of background info: I'm doing an investigation on low temperature plasmas and one of the...
Aug19-08 08:40 AM
1 2,285
My boss and i were considering he following problem (see attached image): 2 unequal masses rotate an equal...
Aug19-08 08:36 AM
3 5,290
I have posted this question earlier also. But i am changing my sentences a bit. This is regarding conservative and...
Aug18-08 10:15 AM
16 1,810
is there another way of considering the specific heat capaciaty of a material (many gas) other than with respect to...
Aug18-08 03:56 AM
4 1,489
Suppose an object is suspended above the Earth, then released. It immediately accelerates to 32.2 f/s^2. There should...
Aug17-08 06:35 PM
55 8,359
Hello, I've come up with a simple, imaginary situation that bugs me. Could someone help resolve my confusion? ...
Aug17-08 05:09 PM
2 1,290
** edit: did I forget how to use tex, or is there a system bug? I'll type the formulas normally below the tex I'm...
Aug16-08 04:09 PM
2 1,162
Hi all, I'm having some difficulty with electric flux. Does electric flux stay the same if you double the...
Aug16-08 04:07 PM
6 2,544
With all the mechanical forces in statics problems I can assume the sense and I might get a negative answer which...
Aug16-08 11:22 AM
2 1,222
Hi all, new guy here. I am trying to understand the laws that govern a diesel motor. I know it compresses air at about...
Aug15-08 10:07 PM
1 1,205
Hi, I was wondering about the path a charge placed in a solenoid that was flown through by alternating current...
Aug15-08 05:10 PM
1 1,338
hello I just can't swallow the idea of mechanical advantage. * if you have a 10 KG mass , you need , say , 100 N...
Aug15-08 04:08 AM
6 1,671
I have a simple lever with two points of equal force, each at a different distance from the fulcrum. --- What I...
Aug14-08 08:43 PM
25 3,278
Looking for some pointers on how to approach this problem: I'm considering a system like the following - two...
Aug14-08 10:08 AM
5 8,244
I know a reference frame moving at constant velocity is a inertial reference frame. Is a reference frame that is...
Aug13-08 02:31 PM
3 1,672
what would be the speed of a bullet on decline fired from a pistol. firing angel is 45Deg. What would be the speed of...
Aug13-08 04:31 AM
1 1,338
In an electric current there must be forces that push electrons in a general direction (current). My question is, what...
Aug13-08 12:09 AM
12 2,596
Part of my early morning ritual involves making myself a nice cup of coffee. I pour my aromatic brew into the cup...
Aug12-08 06:26 AM
0 971
I recently caught a question that I realized was far more difficult than expected. Someone asked how hard they would...
Aug11-08 06:37 PM
10 3,238

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