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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 48,194
Is it possible to filter out infrared light using a prism, and if so, how? What is the math involved to do this? I...
Oct13-11 09:12 AM
Claude Bile
3 2,271
I have a very basic problem in understanding the relationship between electric field and displacement. If a field is...
Oct12-11 08:49 PM
1 824
In wikipedia it says: "Thermal equilibrium is a theoretical physical concept, used especially in theoretical texts,...
Oct12-11 04:37 PM
4 1,025
This morning while riding my motorcycle, a black bird smashed into my helmet. Considering a black bird weighs...
Oct12-11 02:40 PM
9 2,311
hello, I'd like to know if there is any heat capacity database of some common substances. I've searched the internet...
Oct12-11 02:34 PM
2 1,793
could you please tell me why the velocity of the block M along the horizontal direction is v/sinθ and not vsinθ as in...
Oct12-11 11:48 AM
Doc Al
3 1,202
So, I've been working on a problem mostly to figure out how heating a cup of coffee works and am kind of lost now. ...
Oct12-11 11:09 AM
6 6,278
Can someone explain to me how an atom can absorb the energy of an incident photon without being ionised? What is the...
Oct12-11 10:43 AM
3 1,083
Hydrogen balloon naturally moves from low altitude to high altitude in earth's atmosphere. Any object moves from...
Oct12-11 05:29 AM
7 2,305
I understand the basics of speed and velocity, but I got a rather backhanded question on a recent test that I believe...
Oct11-11 11:13 PM
3 2,773
I have problem with Lagrange's equations and their derivation, the way it is presented in Goldstein's "Classical...
Oct11-11 06:52 PM
4 1,273
How does one go about calculating the line of sight from Lagrange point 2, coverage map, of the lunar south pole?
Oct11-11 05:35 PM
0 735
Hi, What exactly is the condition for a constraint to be ideal? Let's call the net force of constraint on particle...
Oct11-11 02:32 PM
0 1,032
Hi, Does anyone know how to write an algorithm for collisions between many objects? An example like this would be the...
Oct11-11 02:07 PM
2 2,709
Hiya guys, I've just started a project, of which the aim is to develop a thermodynamic property database for...
Oct11-11 01:50 PM
Andy Resnick
1 889
I have read in several books and also in this site that the Newton's Third Law does not hold true for "Action at a...
Oct11-11 10:10 AM
5 5,393
When light is emitted from a source it is nearly always unpolarised meaning the E and B fields lie in randomly...
Oct11-11 08:19 AM
Andy Resnick
3 1,254
Hi everybody, I am getting confused by a very simple problem: lets take an infinite sheet electrically charged with...
Oct11-11 02:57 AM
7 2,436
Hey all. I am taking my second college physics course (electromagnetic physics) and am looking for some help deriving...
Oct11-11 12:23 AM
5 886
I read the following in Fowles & Cassiday's Mechanics: "The correct motion that a body takes through space is that...
Oct10-11 09:23 PM
Ken G
13 2,293
I noticed recently that serious bike racers(like that of moto gp) tilt their whole body and bike while taking curves....
Oct10-11 08:05 PM
63 8,373
Question is N/A anymore...
Oct10-11 06:37 PM
0 839
Is there any definition of the zeroth law of termodynamics using the heat concept? And does the zeroth law imply...
Oct10-11 05:49 PM
1 1,036
Hello all, I'm modeling a situation in which a gas moves through a pressure gradient established by a quartz frit...
Oct10-11 05:06 PM
0 1,052
A reaction is Spontaneous means what??a reaction is favorable? let me give an example:-By taking a Balloon and...
Oct10-11 04:08 PM
7 2,607
Hi everybody, I am a graduate student in mathematics, and have hardly any physics background. I was looking to...
Oct10-11 03:01 PM
2 1,855
I'm trying to calculate the final pressure. I was given initial and final temperatures as well as initial pressure, ...
Oct10-11 02:33 PM
0 907
Hi People usually write the (total) polarization like this P(t) =...
Oct10-11 02:31 PM
6 1,279
Hi all!!! I'm studying Fabry Perot optical interferometer (with monochromatic light without taking time into...
Oct10-11 12:51 PM
0 556
In circular motion why the centripetal and centrifugal not get cancelling. .?
Oct10-11 10:08 AM
24 3,272
Hi! I'm working on problem, where I have to estimate energy, lost due to flue gases, i.e. some amount of natural...
Oct10-11 06:24 AM
0 594
Can someone please explain to me the motivation for these definitions of the cross product? Let A = (a1, a2, a3), B...
Oct9-11 11:00 PM
4 4,150
I want to maximize solar cell efficiency regardless of the sun's angle and so I've been looking at placing Compound...
Oct9-11 07:02 PM
5 3,340
could you please tell me how can the accelaration of masses m1 and m2 can be different. i am in a great
Oct9-11 05:42 PM
2 2,238
i want to drive information from spectrum of star but i can not do this. i read many book in this subject but...
Oct9-11 02:18 PM
0 723
I'm startled due to a little thinking, the thing is. (I'm still a beginner when it comes to mechanics so please don't...
Oct9-11 02:04 PM
13 2,123
1. I took two glass plates with a thin film of water trapped in it. One of plates had hook in it. Weights were hung in...
Oct9-11 01:31 PM
1 845
(Part of the) Carnot's theorem: "All irreversible heat engines between two heat reservoirs are less efficient than...
Oct9-11 12:33 PM
2 1,539
hey i got some problems in doing this question...
Oct9-11 08:23 AM
Doc Al
3 1,215
If I graph acceleration vs mass for constant force but variable mass experiment, shouldn't the area under the curve be...
Oct8-11 10:49 PM
1 2,464

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