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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
1 41,701
As a way to express the complex poynting is F = P + j2ω(Wm − We), whats the magnitude and the phase of it based on the...
Oct29-12 08:27 PM
0 405
NVM, Wrong section.
Oct29-12 11:49 AM
0 445
Please see the attached photo. I am not sure how to proceed. I do not know Mi or M2, nor do I have enough...
Oct29-12 09:09 AM
3 1,094
I love physics, but I find that I am ignorant about some of the more basic concepts, so forgive me if this question...
Oct29-12 08:53 AM
4 922
Hello, I am having difficulty understanding the paragraph in my textbook explaining why no other engine can be more...
Oct29-12 08:36 AM
2 907
hi .. ... i am entering a sumobot competition..weight limitation 1kg..dimensions 150mm*150mm...what is more important...
Oct29-12 04:00 AM
4 588
Not sure if I am doing this correct and do not have answer available... A heat pump takes on 30,000BTU/hr of heat and...
Oct28-12 11:41 PM
Andrew Mason
1 799
I having a bit of trouble understanding Joos's treatment of virtual displacements. I am referring to pages 114 and...
Oct28-12 05:01 PM
4 594
Alright so I have a question on the work done with constant acceleration up a hill. I was working an example problem...
Oct28-12 04:16 PM
2 760
Here's the textbook way of calculating the work done by an ideal gas in an isothermal case. PV=nRT P.dV=(nRT/V).dV...
Oct28-12 12:03 PM
3 1,067
So, I know that it has been sort of asked in other forms before, but they mostly deal with human beings and so I've...
Oct28-12 11:38 AM
10 1,457
I am confused why the heat capacity at constant pressure can be different from the heat capacity at constant volume. ...
Oct28-12 11:28 AM
2 847
Hi, It seems that there is no much examples of this particular case. OK, we all know how to write the general...
Oct28-12 11:06 AM
2 1,062
If we consider the kinetic energy of say a car like Nissan Leaf moving at its top speed we have : K.E. = 0.5 x M x...
Oct28-12 10:45 AM
13 1,741
Hello Please, if you UNDERSTAND WHAT IS MOMENTUM, tell me. I want to know, why do I need momentum, why was this...
Oct28-12 09:11 AM
5 624
I understand that if two points are inside a conductor they're at the same potential. I also understand that if two...
Oct28-12 08:16 AM
2 471
When we consider a magnet, usually we perceive the field lines to come out of the north pole. But since the poles of a...
Oct27-12 06:39 PM
4 889
A little while ago I asked: why does wind feel cold. The molecules are moving faster so it should feel hot. The...
Oct27-12 06:19 PM
5 850
Earlier I asked for help about a high voltage power supply, and I was told not to worry too much about 20k volts...
Oct27-12 06:02 PM
21 1,665
When we strike a match which is made of sulfur against a hard surface (I don't know what the surface is made of) a...
Oct27-12 04:51 PM
5 1,091
Hello, I am reading through my textbook and cannot wrap this idea around my head yet Basically, when a molecule...
Oct27-12 03:27 PM
1 732
Can this wave in any way be considered circularly polarized? \overrightarrow {E}\left( z,t\right) =\left E_{0}\sin...
Oct27-12 01:17 PM
4 777
Hey, during last lecture of thermodynamics we did polytropic processes, and with no discuss teacher said, that...
Oct27-12 04:39 AM
0 600
Imagine Two cylinders One inside another with air in between them.There is a cutout made in the Outer cylinder.The...
Oct27-12 02:50 AM
0 564
In classical mechanics, p = mv L = Iω These correspond to linear and angular momentum, respectively. They're...
Oct27-12 12:38 AM
5 4,167
So we're currently covering multipole expansion techniques in my EDM class. The multipole expansion is a summation of...
Oct27-12 12:33 AM
3 4,433
The Gibbs energy is used to determine the spontaneity of a thermodynamic process under isobaric conditions. The...
Oct26-12 07:30 PM
3 738
Hi, I am trying to play around with magnets on my free time, I ordered some neodyum magnets and I've been thinking of...
Oct26-12 07:01 PM
6 894
Let's say I have the electric potential as a function of x, y, and z: V(x,y,z) Now I want to find the x component...
Oct26-12 05:58 PM
1 653
Wavelength of a sinusoidal wave is defined as the spatial period of the wave, which can be measured between any two...
Oct26-12 02:59 PM
2 657
what is the literal meaning of vector product? how could two vectors perpendicular to each other form a new vector...
Oct26-12 02:17 PM
7 1,057
I am having difficulty understanding what a state function is. Yes, I know its a function of the state of the...
Oct26-12 11:17 AM
10 3,007
BOUNDARY CONDITION PROBLEM I have came up with matrix for numerical solution for a problem where chemical is...
Oct25-12 05:50 PM
3 736
Hi, I'm new to working with gratings. From using the basic grating eqn., I'm able to model the diffraction angles...
Oct25-12 04:07 PM
3 665
if you have a magnet that pulls 40lbs of force if you broke that into 2 how much force will each magnet pull. i...
Oct25-12 03:59 PM
4 938
We can know about distant stars temperature,its elements etc by observing its spectra... But that star has a velocity...
Oct25-12 03:54 PM
10 2,571
So having been through translation and rotation I can conclude that my book has found 3 conserved quantities in...
Oct25-12 09:09 AM
6 691
Hello, I'm trying to calculate the resonance-frequencies of my multilayer samples by solving the lagrangian. For...
Oct25-12 08:05 AM
0 519
Dear Physics Forums readers Let a two dimensional rectangle R1 carry a surface charge \sigma and be placed next to...
Oct25-12 06:35 AM
11 1,040
I am working with interference which pattern I want to magnify to a CCD. The question is how can I determine the...
Oct25-12 04:35 AM
AJ Bentley
3 478

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