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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 46,659
The drawing show a barometer with water inside. If I move up object with air inside I recover PV energy (P=external...
Oct18-12 09:37 AM
lba
9 1,006
Hello, I have a problem to understand how the author made the following expansion: ...
Oct18-12 09:07 AM
sliorbra
2 529
Hello, according to the classic physics a body subjected to an acceleration must dispers energy, the earth is...
Oct18-12 07:51 AM
scientifico
14 926
What is the difference among moment, torque and couple? Moment = Fd Torque = Fd Couple mean two forces have same...
Oct18-12 07:39 AM
Philip Wood
1 1,399
Hello, I am struggling to work out a matlab program for the numerical calculation of the streamfunction directly from...
Oct18-12 06:29 AM
Uwe
0 1,378
If you place a conductor in an external E-field the charges inside it will move so as to cancel off the field making...
Oct17-12 07:05 PM
aaaa202
9 917
This is a very simple question. Does a larger f-stop lead to an image with a higher resolution? The reason why I...
Oct17-12 05:25 PM
jbriggs444
5 690
I had a problem understanding the hall effect for flow of holes... I thought flowing of holes means that the electrons...
Oct17-12 04:01 PM
Ezio3.1415
3 1,285
I apologize for the many topics covered at once here, but, this is why: I'm trying to design a vehicle to make...
Oct17-12 03:17 PM
cjl
2 1,298
Hello, Does anyone knows why rigid body does not exist.So in order to know its history which textbook can i refer to...
Oct17-12 02:47 PM
Andrew Mason
31 2,908
If the incident radiation is linearly polarized can the scattered radiation be circularly or elliptically polarized?...
Oct17-12 02:42 PM
mfb
3 481
how does increasing the pressure of a gas cause it to change its state? When we bring an object to high grounds, a...
Oct17-12 12:44 PM
sgstudent
0 498
Im trying to figure out how much power is needed to maintain a vehicles speed on a slope I found out that my car...
Oct17-12 10:11 AM
mfb
2 1,151
If I had water at 180 degrees and dropped the temperature to 160 degrees over a heat exchanger, would I have the same...
Oct17-12 10:04 AM
Chestermiller
1 546
Hello. I would like to ask what word is the letter "s" indicating length derived from? I can't seem to find it...
Oct17-12 09:54 AM
mfb
2 498
Hello, I am trying to calculate the amount of exhaust coming out of an exhaust pipe. I know CFM but I need to...
Oct17-12 08:36 AM
riegel3
0 542
°Hi all, It has been many years since I was in school, so my phisics is very rusty. I have a wood boiler that was...
Oct17-12 08:09 AM
CWatters
2 890
Why can't we fill the balloon with the lightest substance available, i.e. vacuum?
Oct17-12 01:25 AM
cjl
8 822
Please disregard this post
Oct17-12 12:54 AM
1101
0 833
How fast is speed of signal between 2 atoms ? Is it speed of light in electric field and then it slows down to speed...
Oct16-12 09:50 PM
Drakkith
3 876
Hello! I am interested in building a cyclotron. Since I doubt that I will be compotent enough to build a cyclotron...
Oct16-12 08:59 PM
Vanadium 50
23 1,338
Question for the brilliant minds around here: I'm trying to figure the amount of torque (I*a) needed to rotate a...
Oct16-12 01:18 PM
alevesque
4 1,446
So I need a motor that is able to provide \begin{equation}0.412Nm\end{equation} of continuous torque (to overcome...
Oct16-12 08:02 AM
CWatters
5 1,314
I have to admit I don't really understand this theorem fully. As far as I understand it says that the work done on a...
Oct16-12 07:07 AM
Q-reeus
3 1,102
Imagine a dielectric cylinder placed in a uniform magnetic field parallel to its axis. Then we make it rotate around...
Oct16-12 02:24 AM
DrDu
13 1,491
Is there any known method to convert straight into electrical energy? without all that 'steam' part? xD
Oct15-12 08:10 PM
russ_watters
8 947
I'm having trouble understanding what happens to the internal energy of an ideal gas being compressed adiabatically. ...
Oct15-12 06:17 PM
aa1607
2 1,454
Hey, I was just playing about with some lagrangian mechanics and tried to work out the angular momentum of the earth;...
Oct15-12 05:56 PM
TheDragon
2 1,013
A 200 kg canoe lies at rest in the water, near a dock but untethered. Any friction between the canoe and the water is...
Oct15-12 01:49 PM
haruspex
1 1,141
Hello all. I'm a newer engineer in rotor dynamics trying to better understand some things, so perhaps someone can...
Oct15-12 11:54 AM
mfb
6 1,514
Is it because for there to be work there must be heat entering the system, which is what is really causing the...
Oct15-12 11:06 AM
raopeng
4 893
Hello I wrote a simple simulation of an 2D ideal gas, with elastic collisions. I wonder how should I simulate the...
Oct15-12 06:31 AM
mikeph
3 856
Title says it all, confused as to how I'm supposed to define the phase space of a system, in my lecture notes I have...
Oct15-12 12:17 AM
capandbells
4 1,007
Hi, I am working on an example that demonstrates Newtons laws in 3-dimensions (this is NOT homework). In my example I...
Oct14-12 04:49 PM
Vanadium 50
1 737
Hello, if I put two plates one in front of the other and apply a voltage I read that an electric field creates, but...
Oct14-12 04:18 PM
scientifico
3 685
I'm a bit confused about the effect of the size of ferromagnetic material on the magnetic field it generates so I was...
Oct14-12 04:04 PM
Per Oni
2 686
Hi all, I am brand new here and need some help - i hope it is the right category i am posting in. I am no...
Oct14-12 12:25 PM
haruspex
5 1,451
So I just wanted to clarify: Because D = ε0E + P P being zero in vacuum and ∇D is constant regardless of...
Oct14-12 12:08 PM
Danen
2 548
Hi! I have attached the picture. Can someone please tell me what equation of motion will be? My guess is that it will...
Oct13-12 05:43 PM
mfb
3 585
Hi! The damped oscillator equation is as follows: x(t)= A exp(γt/2) cos(ωt) where ω= √( (w0)^2 + (γ^2)/4 ) I...
Oct13-12 12:25 PM
Philip Wood
6 631

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