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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 46,982
Sorry if this question has already been considered in this Forum (I'm sure it is but I can't find it now). A rigid...
May22-14 07:01 AM
Doc Al
31 740
What are cyclic devices exactly? Are heat pumps and refrigerators both examples of cyclic devices? Also is a heat...
May21-14 05:35 PM
dauto
3 224
My book states: ''An engine is a device that turns heat energy into work'' I know the definitions of both heat...
May21-14 04:55 PM
dauto
3 228
Could anyone please write the derivation (or forward me to the source of derivation) of the formula related these two...
May20-14 06:49 PM
UltrafastPED
3 246
Hey guy, this is one of the question in my uni work (I'm not sure whether my answer is correct or not, please have a...
May20-14 06:20 PM
paisiello2
5 321
I have a short question which I have been discussing with a fellow student and a professor. The question (which is not...
May20-14 05:20 AM
muscaria
2 233
Hello, as you might have guessed, my question revolves around thin film optics. My intention is: Given a two thin-film...
May19-14 10:13 PM
Simon Bridge
9 309
Hello! I am not quite sure how do i verify the complex wave function of EM wave \vec{E}(x,y,z,t)=...
May19-14 06:09 PM
melodyyyylwy
2 216
I was doing a question in Taylor book (example 3.3) where a sticky putty is thrown at a stationary wheel. To solve it...
May19-14 04:01 PM
D H
3 225
Hi everyone, I am trying to calculate the decrease in magnetic field strength over distance, using a formula I...
May19-14 03:46 PM
Meir Achuz
4 338
okay so I suck at La-Tex so i'm not going to put the actual equation, but it's not important for my question. In...
May19-14 01:29 PM
WannabeNewton
1 232
I'm currently reading about thermodynamics and osmosis and I happened to stumble across this paper. There is one thing...
May19-14 11:23 AM
nossren
7 324
I read this They do not talk about the metal between glass and air! Reflection occurs between glass (low index)...
May19-14 10:54 AM
naima
2 301
I'm confused why when using cylindrical coordinates three unit vectors are needed. My book says that the three unit...
May18-14 08:19 PM
Matterwave
1 219
There are two sphere of radius a and b and they are connected by conducting wire. Then why the electric potential...
May18-14 01:48 PM
berkeman
7 232
This confusion is about the following problem: Suppose the entire region below the plane z=0 is filled with uniform...
May18-14 09:59 AM
Meir Achuz
5 283
Hi, please could someone explain why the magnetic field is stronger at the poles of a magnet. I know that the field...
May17-14 08:50 PM
enorbet
3 332
http://www.ilrn.com/ilrn/books/spcp07h/Fig_20_14a.jpg I understand how motional EMF is produced, the magnetic force...
May17-14 01:07 PM
BruceW
11 335
Hi I'm confused after reading the definitions of physical Quantity and physical property: Definition from...
May17-14 11:00 AM
dauto
3 373
Hi, I've read that the speed of em waves in the vacuum is the electric field component frac the magnetic field...
May17-14 10:25 AM
mfb
1 212
Hello all, I would like to know a method to trap light. That is, it should be pretty simple and non-electric. It...
May17-14 02:15 AM
albertrichardf
12 290
I am trying to make a very strong magnet that will only last for a short pulse, just a fraction of a second, with a...
May16-14 10:50 PM
Pharrahnox
2 210
When a body is held or rests in equilibrium in contact with a surface (e.g. a slope, the edge of a block etc.) how do...
May16-14 05:14 PM
jbriggs444
7 237
I am trying to find an equation that tells the strength of a magnetic field a given distance away from the source. It...
May16-14 03:04 PM
mfb
22 21,480
Hey guys, umm i'm just gonna get straight to the point, why is the notation of dy/dx for example is being abused so...
May16-14 10:22 AM
D H
22 530
Hi All, I am thinking about building a simple electrical generator, and I am trying to make sure I clearly...
May16-14 05:30 AM
Pharrahnox
7 456
When water is vigorously shaken the kinetic energy and, hence, the motion of the molecules increase. Which particular...
May16-14 03:05 AM
Simon Bridge
1 208
To prepare for a future physics course, I googled Newton’s Laws and then found about the Work Energy Theorem. I can...
May15-14 07:30 PM
russ_watters
56 1,158
Hello everyone, I was wondering, is there any way of calculating the time it takes for two objects in thermal...
May15-14 07:10 PM
Chestermiller
1 237
Hey guys, I've been wracking my brain for a while, and thus I have landed here yet again. My problem is the...
May15-14 12:11 PM
crador
3 378
If I have a grounded conducting material, then I know that $\phi=0$ inside this material, no matter what the electric...
May15-14 05:42 AM
Simon Bridge
3 204
I had a bottle half full of ice and filled it with water and placed it in my fridge. I noticed that the ice was taking...
May15-14 04:18 AM
DrClaude
1 244
In the semi-classical treatment of the ideal gas, we write the partition function for the system as $$Z =...
May15-14 01:38 AM
WannabeNewton
1 242
I'm working on research into the feasibility of separating out the infrared rays above 1200 nm in sunlight for solar...
May14-14 10:10 PM
SIM77
6 213
A new variational principle is presented in this paper: http://arxiv.org/ftp/arxiv/papers/1112/1112.2286.pdf When...
May14-14 02:47 PM
rrhd
1 182
To every scalar field s(x,y) there corresponds a 'constant' vector field x = A s(x,y) and y = B s(x,y), where A,B are...
May14-14 01:16 PM
UltrafastPED
6 200
First, I'm a second year high school physics student so my thinking may be half-baked. I was wondering what motion a...
May14-14 12:24 PM
Agrasin
2 207
In a beam of unpolarised light, there are thousands of light waves of all polarisations. At a given point along the...
May14-14 11:00 AM
maline
6 388
Hello Everybody, Span efficiency factor appears in the lifting-line theory of Prandtl describing Lift and vortex...
May14-14 04:07 AM
A.T.
22 1,912
I have a question that has puzzled me during the last couple of days. Suppose that there is a system (e.g. a small box...
May14-14 01:16 AM
Jano L.
14 526

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