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Classical Physics

- Principles developed before the rise of relativity and quantum mechanics. Mechanics, Electrodynamics, Thermodynamics, Optics...
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Before posting anything, please review the Physics Forums Global Guidelines. Again, for some odd reason, people...
Apr22-11 05:26 AM
ZapperZ
1 41,810
is it, cause velocity isn't.
Jan15-11 04:12 PM
Mueiz
60 9,353
Hi there, Is hydrogen gas transparent to most radiation or is there a wavelength that interacts with hydrogen? ...
Jan15-11 03:35 PM
mathman
3 964
A point charge accelerating through space generates an electric field and radiates energy. But how is this influenced...
Jan15-11 03:00 PM
haas101
2 1,716
Iíve seen this problem phrased several ways and posted several times Ė a couple of times by me. But I have not seen an...
Jan15-11 02:57 PM
RonL
38 3,704
Hi, I write here for the first time and i hope so far i am doing everything properly :rolleyes: I am writing about...
Jan15-11 02:26 PM
Kiquin
2 3,715
Ok first let me say compared to most of you I'm an Idiot... lol... I understand the basic laws of physics and drag...
Jan15-11 01:35 PM
RickinMD
4 874
So I'm really interested in the field of wave optics, and luckily for my undergraduate program, we get to do a...
Jan15-11 09:02 AM
Andy Resnick
6 1,018
I know from the movie that paper burns at fahrenheit 451. I guess this refers to the activation energy paper and...
Jan15-11 03:07 AM
Borek
3 1,349
Hi, Im trying to understand the relationship between heat released in an energetically favourable chemical reaction...
Jan14-11 06:17 PM
Studiot
1 1,268
Effect of a volume increase at constant temperature: A constant temperature means that the average kinetic energy of...
Jan14-11 02:14 PM
NobodySpecial
3 914
Hello there! I have a situation as follows: http://img821.imageshack.us/img821/4026/kuglananagibu.gif I have...
Jan14-11 01:53 PM
pinsky
7 1,756
Hello all, I'd like to calculate the inductance of a straight current carrying wire per unit length of wire. The...
Jan14-11 03:59 AM
Phrak
10 4,546
as you all know the equation for centripetal force is (m((2 pie r)/t)^2)/r). ok so imagine this. a weight attached to...
Jan13-11 09:07 PM
K^2
5 1,306
One form of the third law of thermodynamics states that ; in absolute zero temperature,entropy is absolute that means...
Jan13-11 06:33 PM
DaleSpam
6 1,042
I need the general expression for the lagrangian density of a linear elastic solid. I haven't been able to find this...
Jan13-11 05:42 PM
jambaugh
1 1,111
Ok, I still don't understand heat. As I see it, heat is the measure of how fast atoms are moving. And energy is also...
Jan13-11 02:31 PM
HallsofIvy
6 1,034
i have 2 questions regarding magnetic field... 1)if 2 identical charges move parallel to each other(along y axis)...
Jan13-11 09:57 AM
kloptok
2 776
I have this problem. Imagine, in 3D space, a rocket that has to go to a certain point in the minimum possible time,...
Jan13-11 09:40 AM
pgimeno
8 1,428
Lets say we have an infinite current carrying wire and it is wrapped with a dielectric materiel. Lets say the...
Jan13-11 07:30 AM
cragar
4 1,686
Hi all, I'm trying to find which magnetic materials can operate without too much losses at about 2.45 GHz and have...
Jan13-11 06:22 AM
D4V1D3
0 1,253
What is the reason that there are 4 different thermodynamical potential? How can I know, which of them should I use?
Jan13-11 05:02 AM
pabloenigma
13 2,012
Hi I'm trying to get a better understanding of dispersion in light. Specifically, the relationship between...
Jan12-11 07:47 PM
Beer-monster
9 2,671
Hi All, Iím new here so please forgive me if this isnít the right section to post in. This is a bit of an epic...
Jan12-11 06:58 PM
jack action
1 1,228
I'm still having trouble with this: Generically, work = m * d^2 / t ^2 (mass, displacement, time) If to a 1kg...
Jan12-11 06:34 PM
cepheid
6 1,661
Basic premise: a pure tone sine wave can be modeled with a pendulum and the rate of amplitude decay can be manipulated...
Jan12-11 06:02 PM
dulrich
1 2,629
Hello there! Could someone please help me with setting the starting equations for coupled oscillators. I'm having...
Jan12-11 02:13 PM
neelakash
8 1,508
Hello How would you calculate the total force (due to air pressure) on the top face of a prism, which is partially...
Jan12-11 11:58 AM
MrMatt2532
1 2,302
Hello everyone. I have a problem...I'm calculating natural frequency of a standing cylinder. In order to do that,...
Jan12-11 07:26 AM
mahavidyas
1 1,882
how to obtain the scattering extinction coefficent of a spherical particles illuminated by a bessel beam? thaks!
Jan12-11 04:46 AM
soberprogress
0 1,230
I'm wondering about entropy, free energy and disorder. I see entropy defined along the lines of "the amount of energy...
Jan11-11 08:53 PM
Mapes
9 1,665
On the picture below you see the motionless black sphere and the green rod rotating around it. At the Position A the...
Jan11-11 03:54 PM
gneill
25 3,818
Hello, i don`t understand why it is said that the heat involved in a chemical reaction at constant pressure is the...
Jan11-11 01:50 PM
zalook
0 883
I want to verify my understanding about skin effect and plane wave of conductor wire. ...
Jan11-11 01:48 PM
yungman
6 1,864
why the coefficient of friction of screw jack of two pulley is negative in lowering state?
Jan11-11 11:56 AM
Andrew Mason
1 1,650
Imagine an object is resting upon the floor. The object is pushing the floor with a force mg, which is vertically...
Jan11-11 11:11 AM
D H
22 2,810
Anyone know of any good papers, research i can view on magnetism, also any equations for working out the force of one...
Jan11-11 07:33 AM
Vanadium 50
2 694
For plane wave travel in +ve z direction in a charge free medium, the wave equation is: \frac{\partial^2...
Jan11-11 04:04 AM
Delta≤
3 1,727
- We know that for closed systems, energy transfer between the system and the environment can be in the form of heat...
Jan10-11 11:43 PM
AirForceOne
3 1,933
Hi all, I recently read an article on economist about Maxwell's Demon. It is mentioned that someone disproved...
Jan10-11 08:50 PM
K^2
21 3,312
Consider mass m_{1}and m_{2}with position vector (from an inertial frame) \overrightarrow{x_{1}} and...
Jan10-11 05:21 PM
ManishR
4 633

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