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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 46,927
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 1,515
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
3 857
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 1,008
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
1 740
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 1,454
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
6 633
Consider a simple two particle system with two point masses of mass m at x1 and x2 with a potential energy relative to...
Oct13-12 11:16 AM
mfb
6 891
In a heat transfer with internal heat generation what does the term "internal heat generation" mean? Is that...
Oct13-12 10:07 AM
Chestermiller
3 1,376
Hi, I'm writing a small student-paper on heat pumps, and I'm not at the point where i explain the physics behind...
Oct13-12 09:50 AM
andrien
1 2,406
I'm investigating the phenomenon of sonoluminescence. A quick search has yielded the Rayleigh-Plesset equation as...
Oct13-12 09:46 AM
Ashiataka
2 710
Do you know some example of an operator, other than momentum or position, that has (at least partially) continuous...
Oct13-12 09:16 AM
Jano L.
3 697
The heat equation predicts that heat spreads infinitely far over arbitrarily small time intervals. What happens in...
Oct13-12 09:04 AM
espen180
1 826
Last semester I did a project for grade 12 physics where I had to account for air resistance in projectile motion. I...
Oct13-12 06:09 AM
mfb
3 1,168
Hi there, I'm trying to create a sheet that produces a uniform magnetic field,using either rectangular or...
Oct13-12 05:17 AM
Q-reeus
4 817
The function for simple harmonic oscillation is: Acos(ωT)+\phi Why is there an angle phi added to the function...
Oct12-12 10:09 PM
CrazyNeutrino
8 2,169
Not sure if this should be in quantum section, please move if necessary. We know that: 1. A stationary particle...
Oct12-12 05:17 PM
Jano L.
2 1,091
I have a small pump system for an aquarium, and have decided to build a small manifold. The total volume of the...
Oct12-12 01:23 PM
jakestenson
3 1,049
In a Faraday flashlight, a magnet is shaken to and fro in a solenoid to induce an EMF and thus current. Something like...
Oct12-12 12:19 PM
Q-reeus
5 1,330
we set limits by what we can measure; therefore, it is what we have. This is my general understanding. I think it...
Oct12-12 08:09 AM
Q-reeus
16 2,412
This is a simple enough question, but no one has been able to give me a satisfying explanation. Most people compare...
Oct12-12 05:51 AM
CWatters
25 10,281
When people talk about sunspots and the solar cycle and stuff like that, they often mention magnetic field lines...
Oct12-12 05:16 AM
Q-reeus
3 976
I was wondering, after discovering that in particular scenarios atoms can release photons, how they do it? Is some of...
Oct12-12 04:26 AM
Drakkith
6 1,226
I am very confused with a particular aspect of part of my physics curriculum. Let's say there is an object swinging...
Oct12-12 02:46 AM
Simon Bridge
1 1,312
I was wondering that since most forms of energy can either be in wave or particle form, (example; photons and...
Oct12-12 12:26 AM
Drakkith
5 1,044
entropy = jouls/kelvin supose 1 liter of ideal gas is allowed to freely expand into a 2 liter volume in an isolated...
Oct12-12 12:11 AM
Andrew Mason
1 915
Will any one help me to understand the concept of reduced mass , where does it come from and its physical significance
Oct11-12 08:42 PM
Simon Bridge
4 911
I was reading a book on wave and found that when they derive the equation of shm from the equation force varies with...
Oct11-12 08:10 PM
Shan K
7 979
If an isolated body starts to accelerate, why would saying the system isn't properly isolated render Newton's second...
Oct11-12 07:55 PM
autodidude
2 621
I am a bit confused about gravitational potential energy near the earth, namely the formula given by mgh. I know...
Oct11-12 06:52 PM
Simon Bridge
17 1,379
I was wondering if my measurements book that states there are 9,460,000 km in a lightyear is correct. I raise this...
Oct11-12 06:46 PM
Drakkith
7 822
http://www.icarusengineering.com/Dynamic-Soaring-and-SE.htm http://www.youtube.com/watch?v=wHPjxf4q91Q I am...
Oct11-12 03:23 PM
A.T.
23 2,762
In Jackson Classical Electrodynamics (P. 498) Eqs 10.130 and 10.132, which describes waves from a conducting sphere...
Oct11-12 01:47 PM
rays
0 537
Walter Lewin at MIT says that at a point of stable potential energy(like the troughs of a wavy surface), d^2u/dx^2...
Oct11-12 12:53 PM
CrazyNeutrino
0 390
Hey guys, I am trying to conceptualize as to why shear stress in a vessel is highest at the wall of the vessel and...
Oct11-12 12:47 PM
Chestermiller
7 1,073
If the wheels and tires of a car are rolling without slipping or sliding when turning, the bottom of the tire is rest...
Oct11-12 11:21 AM
A.T.
7 1,433

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