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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 47,832
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
clem
1 1,286
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
Narcol2000
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
phdpe
0 1,022
prove this claim in landau ... Closed systems have lagrangians which do not contain time explicitly
Aug22-08 08:33 AM
pardesi
0 1,244
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 5,403
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
ManuTOO
0 1,218
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
Defennder
1 971
Im trying to calculate energy of the turbines to lift an airplane , by this way, calculating potential energy...
Aug20-08 10:49 PM
rcgldr
6 1,764
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
Mårten
35 4,383
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
atyy
15 2,585
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 1,373
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
amppatel
3 2,157
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
rdbateman
5 1,664
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
azimovas
6 2,715
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
antenna
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
DaleSpam
1 2,291
My boss and i were considering he following problem (see attached image): 2 unequal masses rotate an equal...
Aug19-08 08:36 AM
jasc15
3 5,302
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
i_island0
16 1,812
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
gemt
4 1,490
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
TVP45
55 8,380
Hello, I've come up with a simple, imaginary situation that bugs me. Could someone help resolve my confusion? ...
Aug17-08 05:09 PM
DaleSpam
2 1,295
** 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
tony873004
2 1,164
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
atyy
6 2,547
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
merryjman
2 1,228
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
DaleSpam
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
h0dgey84bc
1 1,341
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
ali171
6 1,676
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
russ_watters
25 3,286
Looking for some pointers on how to approach this problem: I'm considering a system like the following - two...
Aug14-08 10:08 AM
matematikawan
5 8,251
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
DieCommie
3 1,674
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
tiny-tim
1 1,339
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
Phrak
12 2,609
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
Aquafire
0 972
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
Topher925
10 3,260
Does anyone know how ships are degaussed exactly? I know that basically very thick electrically conducting cables are...
Aug11-08 01:27 AM
greglaakso
11 5,164
Hi there! I was wondering if you folks could give me a little enlightenment. Two days ago, I read a quote which led...
Aug10-08 12:36 PM
Crosson
4 1,090
My friend and I were playing cards, and he was shuffling the deck. He claimed that the longer he shuffled, the 'more...
Aug10-08 11:05 AM
Ygggdrasil
5 4,789
i have this doubt in teh famous brachistrone problem The Problem we have to find teh path y(x) connecting two fixed...
Aug10-08 06:31 AM
dy-e
8 5,389
i need help understanding............im under the impression that even though the moon orbits the earth, and the earth...
Aug10-08 06:08 AM
tiny-tim
9 3,133
Consider, a particle at position 0 at time = 0 Lets say it moves to 0.5 after 0.5 seconds It moves to 0.75 after...
Aug9-08 08:31 PM
HallsofIvy
18 1,972

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