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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 47,915
Protons with momentum 2.210−16 kg*m/s are magnetically steered clockwise in a circular path 1.8 km in diameter at...
Mar2-08 09:07 PM
mgoff87
3 4,033
I am trying to understand the so called "butterfly effect". http://en.wikipedia.org/wiki/Butterfly_effect By...
Mar2-08 05:42 PM
giann_tee
21 4,666
I see in several physics papers and articles current, current density represented by vectors. But in one book it was...
Mar2-08 05:29 PM
Phrak
21 8,026
why some materials reflect light more than others?
Mar2-08 11:23 AM
BWElbert
1 6,739
i was doing some reading on structural mechanics and i stumbled across this example: i don't really get the...
Mar2-08 10:29 AM
Mapes
1 7,159
Hi all, We are now going to do a kind of experiment in which we use a plumb bob to identify the vertical direction....
Mar2-08 08:47 AM
D H
9 8,854
The basic law of electric charge fields is that like charges repel and unlike charges attract. This does not come out...
Mar2-08 04:43 AM
manjuvenamma
3 15,435
Hello everyone, this actually happens to be my first post on PF. So, this question is a rather basic one, however the...
Mar2-08 12:19 AM
BWElbert
0 573
I've looked at the equations for torque, inertia, and angular acceleration, but I still can't figure this out. I was...
Mar1-08 01:32 PM
Lojzek
7 1,429
If i had a non-uniform magnetic field - one that dies down with distance - what constants or factors would change? ...
Feb29-08 02:06 PM
rsr_life
0 1,152
http://www2.uah.es/jmc/ai14.pdf On page 2 of the above pdf there is an example in a box with title 'Acceleration'...
Feb29-08 10:16 AM
Emanresu
3 1,243
Hello all, This is my first post so be gentle. :smile: I am programming a ballistics related script to a...
Feb29-08 08:54 AM
Einherj
4 5,286
can any one guide me regarding the free body diagram for a coupled harmonic oscillator, i mean the conventions...
Feb29-08 04:14 AM
sphyics
0 1,996
Hi, I'm having some difficulty understanding the definition of an electric field. When we define the electric...
Feb29-08 12:40 AM
cepheid
9 2,527
When you have an insulating region within a conductor and an electric field is applied such that a current flows, this...
Feb27-08 05:40 PM
Wiemster
1 2,019
I'm very happy that I found this forum, hello everyone. I'm studying Lagrangian Dynamics and I can't figure out how...
Feb27-08 03:26 PM
alanic
1 1,945
Hello guys. I have a simple question regarding an LC circuit. Imagine a voltage source V_0, a capacitor C and an...
Feb27-08 10:08 AM
AiRAVATA
5 5,681
How to convert density from mol/L to kg/m3?
Feb27-08 02:18 AM
Stupid_Engine
3 30,557
suppose i am moving in a train and at the same time playing a violin .Is the dopller effect/formulae applicable for me
Feb26-08 05:37 AM
tiny-tim
5 2,258
We know that if current is flowing in the direction of z-axis (verical), magnetic field is formed in a plance...
Feb26-08 04:53 AM
rahuldandekar
1 11,832
When a ball spins....does it always have one point which is spinning faster? Meaning is it possible for a spinning...
Feb25-08 10:37 PM
rcgldr
5 1,943
why silver atoms reflect light? why they don't refract it, like the Huygens's principle says?
Feb25-08 03:12 PM
Physicsissuef
8 4,052
- the electric force is inversely proportional to the square of the separation r between the particles and directed...
Feb25-08 06:09 AM
tiny-tim
4 1,597
In order to produce coherent laser light is it necessary that the length of optical cavity between the mirrors is a...
Feb24-08 10:06 PM
Manchot
4 4,124
When you put a metal (conducting) spoon inside a microwave, it takes a few seconds, and then you get sparks, that...
Feb24-08 10:35 AM
Yoni
0 1,360
Hi. This is a simple one (I think): We all know a swing, or simple mass on a spring, moves in harmonic motion, and...
Feb24-08 09:44 AM
Yoni
5 3,867
I guess this is a common question: What is the difference between phase and group velocities? When are they equal?...
Feb23-08 11:09 PM
rahuldandekar
5 2,280
Now a part of a project or anything, but a product of a question a friend of mine asked about the third law. Please...
Feb23-08 10:59 PM
rahuldandekar
14 2,190
Hi all, I am having a hard time understanding the following scenario (I'm quoting from page 305 of the "Electricity &...
Feb23-08 07:24 PM
david20
5 10,902
Hi, I am trying to figure out how much energy is stored in compressed air. I have figured out that a device I am...
Feb23-08 10:51 AM
selvakumar
2 7,478
Hi, I'm studying plasma waves now, and we have talked about waves in class that have phase velocities faster than...
Feb23-08 09:56 AM
russ_watters
1 1,142
can someone please explain why when banking a curve at an angle so that no friction at all is needed to maintain the...
Feb23-08 09:00 AM
rcgldr
2 1,909
What happens if two waves polarised in the x and y direction , say, interfere? Will the interference pattern be of...
Feb23-08 07:34 AM
rahuldandekar
7 4,223
A fresh question. I want to find the number of photons falling on a pixel in a CCD. A very simple model: * bigger...
Feb23-08 06:23 AM
Theraven1982
0 3,072
Consider an uncharged spherical conductor .It has a cavity carved out of it and there's a charge q in the cavity.Now...
Feb22-08 10:15 PM
rahuldandekar
5 2,421
1) between two charged plates, the electric field is given by E=U/d=F/Q->F=QE that means that the force on a particle...
Feb22-08 03:15 PM
monish
1 8,624
how can you build a device that can produce radio waves?
Feb22-08 01:43 PM
Mentz114
2 11,672
Apologies if this is the wrong forum, but I have a pair of thematically connected questions that I can't really fit...
Feb22-08 01:09 PM
Fallen Seraph
0 2,183
Could someone try and explain with the differential form means? I've only taken p to calculus 2 so I'm not really sure...
Feb22-08 12:25 PM
rbj
5 11,433
Ok, just a crazy idea of mine since I am bored, and arguing with itisali does not amuse me. Imagine universe with...
Feb22-08 11:04 AM
Tachyonie
5 1,400

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