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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 45,973
Enthalpy is a state function because it only depends on the initial and final state. Work is a path function because...
Jan4-13 04:37 AM
Studiot
15 1,651
Hello everyone i bought a kit for my senior project on electromagnetic levitation. It uses an electromagnet to suspend...
Jan3-13 11:34 PM
wubbzee
4 933
We are usually told in an introduction to general relativity that when special relativity was completed, there was a...
Jan3-13 08:58 PM
LastOneStanding
2 601
I thought of this question the other day, and I was unable to solve it. A Google search has not helped, so I thought...
Jan3-13 06:11 PM
tiny-tim
3 767
I was watching a video on the internet about charge distributions over solid conductors. The solid conductor was...
Jan3-13 03:08 PM
CAF123
2 702
I have been scanning a physics book. See attachment. The diagram shows that a light bulb has a continuous spectrum...
Jan3-13 12:13 PM
barryj
8 825
Here is a picture of a situation I thought of: http://i.imgur.com/mLr3Q.png The circles between the magnets...
Jan3-13 06:50 AM
BruceW
21 1,415
Hi,can someone explain me this picture? : http://www.accessscience.com/search.aspx?rootID=792797 I dont...
Jan3-13 05:49 AM
thedy
3 2,145
I'm confused about the single slit diffraction pattern. Why are light and dark patterns? Where is the constructive and...
Jan3-13 03:20 AM
Drakkith
4 617
β= (1/v)(∂v/∂T)constant pressure. What is the v represent? molar volume? If I am given the β and the change of...
Jan2-13 08:14 PM
Chestermiller
5 962
This is not a home work, it is part of the text book on elliptical polarization. Attached is a page in Kraus Antenna...
Jan2-13 07:13 PM
yungman
0 904
I'll be teaching an AP Physics class in a few weeks. Usually labs are equiped with lots of desktop computers, to...
Jan2-13 04:05 PM
johnbbahm
5 938
i,Lj]=εijkLk how can I prove this expression classically?
Jan2-13 02:04 PM
ssamsymn
2 661
I have a conceptual doubt concerning capacitors. Suppose that I connect the terminals of a resistor to a charged...
Jan2-13 01:41 PM
pc2-brazil
5 823
I've seen the standard derivation of the expression for liquid pressure P = dgh where, d = density of the liquid;...
Jan2-13 12:15 PM
BruceW
13 1,948
On an undergrad engineering level of talk, is there any difference between conduction and diffusion ways of heat...
Jan2-13 10:30 AM
indianaronald
3 2,008
Convection heat transfer rate decided by Newton's cooling law doesn't have a relative velocity between the fluid and...
Jan2-13 10:29 AM
indianaronald
6 1,058
Why is the energy stored in a spring 1/2 * distance * force? Isn't work just force * distance?
Jan2-13 05:53 AM
GeneralOJB
2 584
Ok, so the other day I was chatting with a friend of mine, and this doubt came up... It is my understanding that hot...
Jan2-13 12:16 AM
SteamKing
5 820
I am trying to understand the derivation of Snell's law using Maxwell's equation and got stuck. My text book says...
Jan1-13 08:33 PM
Simon Bridge
6 1,128
My brother and I were discussing fuel consumption which lead to this thought experiment. Let's say you have two...
Jan1-13 03:07 PM
Harut82
9 1,237
to see anything will occur spontaneously or not. A system is isolated, we will look at the entropy. A system at...
Jan1-13 04:09 AM
Outrageous
0 545
Attached are the drawings. Does the polarity Eof depend on \Gamma =\frac {\eta_2-\eta_1}{\eta_2+\eta_1} So if...
Dec31-12 03:23 PM
yungman
0 696
Buoyancy is an artifact of gravity that moves mass up away from the center of the earth in a fluid whenever the...
Dec31-12 01:26 PM
genergy
16 2,357
The field outside a body with spherical mass distribution is well known but for a non simmetrical body (or a almost...
Dec31-12 10:22 AM
Frank66
6 1,604
Hi I just wanted to run this hypothetical power plant idea past you physics guys to see what kind of feedback I...
Dec31-12 10:18 AM
russ_watters
42 11,591
Hi, I'm studying Small Oscillations and I'm having a problem with normal modes. In some texts, there is written...
Dec31-12 07:46 AM
Jano L.
3 880
In rolling without slipping, why does the point of contact have zero velocity relative to the ground? If so, how can...
Dec31-12 07:33 AM
rcgldr
5 1,638
Hey forum. So I was posed the question whether the forces on two ropes will vary or not depending on if the ceiling...
Dec30-12 11:34 PM
SweatingBear
10 1,218
Is it correct to assume that two objects, with different masses, dropped from the same height at the same time will...
Dec30-12 06:25 PM
tiny-tim
8 1,103
I took a piece of carton and cut out to strands in it. When I shine the line through it, it only projects the two...
Dec30-12 03:34 PM
jtbell
2 1,006
Hello, why if a ray pass though different materials its direction changes ? couldn't its propagation speed just...
Dec30-12 08:55 AM
barryj
1 504
we know that in rolling motion the top of drum has linear velocity 2v if the centre of mass has linear velocity v....
Dec30-12 06:46 AM
Phyman1109
4 766
I want to find Poisson brackets. $$=\sum_l (\frac{\partial M_i}{\partial q_l}\frac{\partial M_j}{\partial...
Dec30-12 02:44 AM
bznm
2 1,047
Is that possible to calculate entropy when dq=+100J , temperature change from 271K to 273K ? Ice melt until 273K ,...
Dec30-12 01:54 AM
Outrageous
6 1,229
So I was reading my textbook and it says that we are given a situation where two particles of the same charge are...
Dec30-12 01:18 AM
Phyzwizz
2 920
Hi! :) I'm trying to calculate the appropriate lenses to use for a project. I need to magnify a 50mm by 50mm...
Dec29-12 11:43 PM
kingkahuka
1 898
Alright, here's the context of my question: I have a pistol for home defense, and I keep a magazine loaded with...
Dec29-12 07:46 PM
russ_watters
6 2,317
In his Nobel lecture Feynman describes an electrodynamic action between a set of particles (equation 1, one third way...
Dec29-12 06:13 PM
Jano L.
1 659
For ideal gas , can I assume Cv dT = nkT (3/2) , thank you
Dec29-12 03:41 AM
Outrageous
2 1,092

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