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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 47,887
If I have a heatsink which I know the natural convection thermal resistance (TR), is there a way to calculate or...
Apr14-12 06:07 PM
JerryG
0 1,517
When there is a lamp on a wall and the light from the lamp falls on the wall, we notice that the shape formed by the...
Apr14-12 05:17 PM
haruspex
3 863
Hi, can anyone help me to understand why the pressure of a ideal solid is zero?. In my class we calculated this in...
Apr14-12 03:17 PM
dapias09
0 736
I try to understand how gravity in 1/h can compensated torque give from film of water between 2 helicoids. 2...
Apr14-12 03:07 PM
Gh778
0 698
So I'm trying to analyze a scenario in which I have a plane wave incident (from, say, some medium with permittivity...
Apr14-12 01:46 PM
VortexLattice
4 974
In the Lorenz gauge, the Maxwell equations reduce to four inhomogenous wave equations, with the charge density acting...
Apr14-12 01:05 PM
jjustinn
8 1,517
There are many good treatments of the classical central force problem in many undergraduate and graduate text books. ...
Apr14-12 12:45 PM
jjustinn
1 882
Some have said it was 6000 degrees K. I'm not so sure. I know for sure that you can increase solar intensity...
Apr14-12 11:34 AM
DaleSpam
42 3,861
Why is it easier to push a load on a wooden crate on wheels when you are nearer the load and the lever is shorter and...
Apr14-12 11:22 AM
DaveC426913
3 816
My research is related to magnetism and I'm supposed to have a good understanding of permeability but I'm afraid I...
Apr14-12 10:04 AM
Hassan2
2 2,028
I was reading through my notes and this idea popped into my head: If you had to drop a liter of water from a certain...
Apr14-12 04:42 AM
Dadface
9 985
I've preformed an experiment about the speed of sound waves in water and I found that sound travelled faster in hot...
Apr14-12 04:14 AM
Bobbywhy
1 5,402
Hello. I have a question about when the Lagrangian can be used. In the textbook we are using it is shown that for...
Apr14-12 03:21 AM
dsdsuster
2 969
Hello, I'm having some issues with Love's equivalence principle. I'm studying Balanis' "Antenna theory" (1997),...
Apr13-12 04:32 PM
eliotsbowe
4 1,822
Hello, I'm trying to create a model of pendulum motion in Matlab to fit the curve we measured in class, and it has...
Apr13-12 03:37 PM
mathman
1 1,823
i know these topics are discussed many times and i have read many of them but still have a doubt. Suppose a car is...
Apr13-12 03:20 PM
Creator
3 671
Hi Guys, Given a resistor, I understand how to use the bands to calculate the resistance, but how does one tell...
Apr13-12 12:24 PM
Jasso
6 1,044
I learnt that solids conduct heat by vibrating and thus transferring the energy from one particle to another particle....
Apr13-12 06:43 AM
sgstudent
7 1,488
The above equation gives the EPE of two point charges separated by a distance r. Firstly, I do not understand how...
Apr13-12 04:57 AM
elemis
10 1,022
Hi guys, I derived an equation for determining orbital period, given an altitude, speed, and mass of the primary and...
Apr13-12 01:00 AM
Creator
7 3,715
It's just a simple question about the pressure under and over the plane's wing problem that I'm trying to answer....
Apr12-12 09:05 PM
cjl
17 2,581
Why is it that only Canonical transformations preserve the Hamilton's equations? Or what makes non-canonical...
Apr12-12 07:20 PM
Dougy81
1 639
Hi guys not sure if this belongs in the homework section, anyway here goes! I'm trying to calculate the total...
Apr12-12 06:13 PM
smalveh
4 749
For example the microcanonical ensemble uses a dirac delta distribution on a certain energy shell E, which is not...
Apr12-12 04:01 PM
nonequilibrium
0 705
Hello, I have this problem with deriving the formule from de definition of potential energy Picture show a...
Apr12-12 03:16 PM
HWGXX7
8 1,368
Mathematically,its easy to say that when the distance between the points tends to zero,for the dipole moment to stay...
Apr12-12 11:30 AM
ashishsinghal
2 1,409
Imagine that I pour a bowl of water onto the stones in sauna. So, the problem is that I need to estimate how much did...
Apr12-12 09:56 AM
Hg00000
3 1,768
What, other than recoil, the user's unsteady hands and gravity, causes bullets to impact different places on the...
Apr12-12 08:17 AM
mfb
3 817
Hello, everyone. I'm working on simulating shallow water flow. I'm using the MacCormack scheme and fractional...
Apr12-12 07:45 AM
MartinV
1 1,342
If I push a cylinder along a surface with friction then am I right in saying that it would almost instantly start a...
Apr12-12 05:19 AM
Filip Larsen
4 1,163
Hi, I want to know if one sees a canonical transformation that would transform the following Hamiltonian in the...
Apr11-12 11:57 PM
Dougy81
0 1,072
I'm at the end of my vector calculus textbook, and there is a section on how vector calculus can be used to derive...
Apr11-12 11:25 PM
victor.raum
5 991
Suppose I have two metal spheres, radius 1 metre and 1 cm. I charge the small one to 100V. The self-capacitance of...
Apr11-12 08:58 PM
sambristol
1 1,290
Hi, I'm having some trouble understanding how this works. I'm trying to put the pieces together but I'm hoping...
Apr11-12 08:49 PM
mindoftea
7 1,886
Hi, I am trying find equations for continuous "stretchy" collisions, in other words, I have two perfectly round...
Apr11-12 06:54 PM
mindoftea
3 1,195
Hey there, I've been reading a lot about piezoelectric materials lately and I've steel looking for an answer for a...
Apr11-12 03:55 PM
itamar
0 830
Hi, I was studying Cherenkov radiation and here's what I read. A charged particle moving through a medium has an...
Apr11-12 03:46 PM
McLaren Rulez
3 796
I would like to calculate the torque on the air object under water. The pressure is only give from water (water...
Apr11-12 11:46 AM
Gh778
5 1,008
I always hear a difference between transverse and longitudinal waves, and, standing and traveling waves, but for me,...
Apr11-12 07:50 AM
Doc Al
6 10,471
A cable weighing 10kg/m supports a 250kg beam(AC) hinged at the wall(BC). The beam is 4.5m long. Find the length of...
Apr11-12 05:51 AM
jayman16
0 1,147

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