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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 46,892
How can Ohm's law explain the fact that the resistance of a wire depends directly on length and inversely with area?
Sep15-11 01:17 PM
3 1,278
In Gamow's short book 'Gravity' he describes the effect of lunar gravity on the earth, in particular the seeming...
Sep15-11 06:39 AM
86 9,146
Hello everybody, i previously posted a topic about an exercise on luminance that was (appropriately, I admit) moved...
Sep15-11 12:42 AM
Ken G
3 1,699
Howdy, I am looking to find the rate of ascent for a weather balloon filled with helium. My assumptions as of now are...
Sep15-11 12:06 AM
2 1,859
I am having trouble conceptualizing and drawing situations that involve glass, or any other medium that light travels...
Sep14-11 10:23 PM
6 1,044
There is patent which describes new type of something similar to capacitor based on quantum effects....
Sep14-11 07:19 PM
1 1,277
Simple question, if the force of gravity is proportional to mass and distance, as in Newton's and Einstein's theories...
Sep14-11 10:08 AM
10 2,710
What happens to gas temperature in different parts of closed chamber (let's say for arguments sake, a closed cylinder...
Sep14-11 09:21 AM
sweet springs
9 1,652
Hi guys, I have this problem, I would like to use microwave to heat gold nanoparticles (~5nm) dispersed in water....
Sep14-11 08:36 AM
0 1,073
why does a body has inertia and from where does it get that inertia,theoretical explanation will suffice?
Sep14-11 08:33 AM
10 1,197
Hello everyone, first time poster. A fairly basic question: What is the mechanism by which synchrotrons produce...
Sep14-11 05:29 AM
3 1,165
So I built a little homemade CD/cardboard box spectrometer just for fun, but a weird thing happens with it. I keep...
Sep14-11 12:49 AM
0 609
Is it possible to find the distance covered in a certain time when acceleration depends on velocity, such as an...
Sep13-11 11:00 PM
2 1,531
When I shine two different lights at a single spot on a white screen, say, yellow and blue, they both hit the spot and...
Sep13-11 06:34 PM
sweet springs
9 1,693
suppose that i have a piece of magnet close to a piece of diamagnetic material the piece of diamagnetic material is...
Sep13-11 02:25 PM
2 1,116
The phase space trajectories of an autonomous system of equations don't intersect. Can this be proved...
Sep13-11 02:00 PM
1 1,744
Hey! I stumbled across this problem while reading Wald's "General Relativity", but it belongs to Electrodynamics....
Sep13-11 01:14 PM
0 1,338
for the adiabatic expansion of a gas, why is the temperature drop smaller for a real gas , vs a bigger drop for an...
Sep13-11 01:02 PM
Philip Wood
13 4,105
Hello, I know this seems silly to ask, but how could I figure out how much heat was given off when I know the force...
Sep13-11 12:50 PM
Doc Al
5 1,134
I've been reading up on photolithography trying to understand how processors with sub-wavelength features can be made...
Sep13-11 11:18 AM
3 1,109
I'm having some difficulty applying Gauss's Law to metal plates. From what I've studied it seems to me that Gauss's...
Sep13-11 06:54 AM
7 2,534
I have spent lot of time trying to understand scattering from Goldstein but in vain. The general equation of an orbit...
Sep13-11 06:39 AM
0 936
I need to adjust the safety trip at 110% of the nominal load ( 130 tons ). This means that I need to load the...
Sep13-11 04:43 AM
10 2,366
So, am I understanding this correctly? The movement of electrons is the fundamental interaction of all that we...
Sep13-11 03:16 AM
3 939
I know what they are Mathematically and their definitions but looking at them from an intuitive way as a property of...
Sep12-11 08:58 PM
Ken G
13 3,610
Good afternoon, I've tried to find a simplified model for the dynamic forces acting on a rolling wheel, but have...
Sep12-11 08:20 PM
3 1,676
For an ideal gas, PVK=C, where C is some constant and K is the ratio of the specific heats. K is obviously the same in...
Sep12-11 04:40 PM
Philip Wood
3 2,836
weight is more at night than day. is this right? if not why?
Sep12-11 01:17 PM
15 1,695
Hi all, I am seeking for an optical design an simulation platform. There will be splitters, combiners and mirrors...
Sep12-11 11:56 AM
2 1,032
A spinning top has angular momentum that creates a force that keeps it from falling over, and it precesses. Mass in...
Sep12-11 11:12 AM
4 1,699
Electric potential is the work done in moving a unit charge from infinity to a point in an electric field. Electric...
Sep12-11 10:04 AM
10 3,896
Is this following correct? : When you push a crate along the floor at a constant velocity for a long time, you get...
Sep12-11 09:52 AM
2 1,059
Hi guys, I'm stuck on some thermodynamic calculations and I would really appreciate some help! I'm trying to...
Sep12-11 08:01 AM
0 2,419
if a gas expands isothermally but irreversibly from V=1litres to V=2litres under constant external 1atm pressure, ...
Sep12-11 05:07 AM
26 3,941
Say I launch an object (a cart) up a frictionless inclined plane at an angle of 'theta' to the horizontal. ...
Sep12-11 01:25 AM
Ken G
3 4,696
Many runners twist in their upper body while they run. You can see this by watching the logo on their tee-shirt move...
Sep11-11 09:25 PM
Ken G
1 1,333
Hi, If I have a magnetic field orientated in the x-direction, a dipole positioned on the z-axis how do I find which...
Sep11-11 08:42 PM
1 1,310
So every mountain biker or motocross rider knows to never grab the front brake in the air. When you do the front end...
Sep11-11 06:24 PM
11 1,780
What are some currently unresolved problem in thermodynamics? Thanks
Sep11-11 05:06 PM
Andy Resnick
3 2,493
Hi all. I was working on a circuit question with inductors and I then had a question. Lets say we have a simple...
Sep11-11 01:30 PM
3 1,270

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