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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
1 47,674
I want to ask why a rod's rotational inertia with rotational axis at its end is not 1/2 mR2 but 1/3 mR2?
Apr10-12 01:42 AM
4 933
it was pointed out to me that a venturi won't function if the pressure differential before and after the venturi is...
Apr10-12 01:26 AM
1 730
I recently read that the earth's axial tilt fluctuates between 22 degrees and 24 degrees. Can someone explain what...
Apr9-12 11:47 PM
McLaren Rulez
5 1,623
I'm reading Thermal Physics by Kettle and I feel I'm having trouble really grasping what entropy is. From my lower...
Apr9-12 11:34 PM
1 1,185
Let's consider a system of three boxes stacked vertically, resting on the ground. There is friction acting between...
Apr9-12 10:36 PM
6 1,106
Question about analytical mechanics. Suppose we have a system with N degrees of freedom, and hence N generalized...
Apr9-12 09:36 PM
17 1,956
I was studying RC circuits recently and I'm interested in this:...
Apr9-12 09:07 PM
0 1,079
What pressure does diesel fuel become explosive at?
Apr9-12 08:27 PM
0 570
so i have been studying chaotic system in class, and i just want to know if we change the initial conditions of a...
Apr9-12 06:30 PM
Filip Larsen
3 931
My question is at the bottom of this post PREAMBLE: If a dipole is turned by an angle θ (in a uniform electric...
Apr9-12 04:30 PM
1 1,019
I have just returned from a holiday in turkey, and the resort we stayed at had a water slide that ran into the pool....
Apr9-12 02:39 PM
19 10,729
I'm hoping someone can help me. I have only a rudimentary knowledge of physics, but have strong scientific instincts,...
Apr9-12 08:51 AM
9 1,255
Hello, I was just thinking about an inductor and how inductors store energy in a magnetic field around them. I then...
Apr9-12 06:29 AM
5 1,243
If Work= \intFdx and Potential Energy, U= -\intFdx What is Work in terms of potential (and potential and...
Apr9-12 03:59 AM
0 1,193
Does a magnetic flux tube always have a current flowing in it? Where is the current? Electrons on the surface and...
Apr9-12 03:58 AM
2 967
Hey, I needed a clarification regarding this. Are photovoltaic cells ohmic devices? Or if I consider an entire PV...
Apr8-12 11:59 PM
5 1,337
Hello, I'm pretty horrible at thermodynamics (one of my weak subjects I'll admit) so sorry if my questions are real...
Apr8-12 09:29 PM
19 2,245
Could you make a fluorescent lamp with krypton instead of neon or mercury? The wavelength doesnt really matter its...
Apr8-12 07:15 PM
Andy Resnick
6 976
Is it true that by finding exact resonant frequency we could ionize matter or split molecules? What is frequency to...
Apr8-12 07:03 PM
5 3,976
Consider a wire of length l. At time t=0, one end of the wire is at temperature T_0, while the rest of the wire is at...
Apr8-12 06:31 PM
7 2,049
The Sturm-Liouville Equation describes normal-mode solutions to the general string equation: ...
Apr8-12 01:28 PM
0 596
Hi, I just want to make sure my intuition is correct for why capacitors add normally when placed in parrallel and...
Apr8-12 01:05 PM
2 1,029 I have to calculate the small oscillations around...
Apr8-12 01:00 PM
1 692
For an object sliding on a horizontal surface, there is a dive effect caused by friction. This means that the front...
Apr8-12 09:29 AM
4 855
I'm a little bit confused about this...i know that when a current-carrying conductor is placed in a magnetic field, it...
Apr8-12 07:49 AM
1 2,234
Hi there, Is there someone who would know how to solve the following potential flow theory problem: How to find...
Apr8-12 05:54 AM
0 826
Also, what are some good resources for learning ABOUT physics?
Apr8-12 03:33 AM
4 681
Hey Guys! I need help with interpreting something regarding simple barometers. I believe I understand what is going on...
Apr8-12 02:13 AM
1 1,167
Hi, I learnt the basics about tensional force and I have some queries about it. I'm hoping you guys are able to clear...
Apr7-12 11:41 PM
4 819
Here is the run down first, I'm trying to find a min mass flow rate for my project which needs to be 1 GPM, and max 4...
Apr7-12 08:49 PM
2 1,013
Hi, So if I start with the boundary conditions U(0,t) = T1 and U(L,t) = T2 and T1 does not equal T2, it...
Apr7-12 08:05 PM
0 656
Well, I'm not a physician so, maybe my doubt is a little fool. Well, I'm mapping the light emitted by some lamps in...
Apr7-12 05:41 PM
0 1,095
Hi guys, Their is something I don't completely understand regards to parrallel/series circuits. We know that the...
Apr7-12 02:57 PM
4 941
In the proof that I have studied, there is a Isothermal cavity that behaves as a black body. there is another small...
Apr7-12 01:57 PM
3 1,191
See attachment for my text's explanation's on the permittivity and permeability of free space, if you want but it's...
Apr7-12 01:02 PM
Bob S
2 2,302
Hi, I was hoping someone would be able to help me with a microscopy problem that has been puzzling me for a while. ...
Apr7-12 09:32 AM
3 3,264
Hi all, I have a conceptual question about the net force of a rotating or spinning ball attached to a string. If we...
Apr7-12 09:26 AM
3 2,325
I need a good book, or in other words a book and it's solution manual if available on line - in classical physics....
Apr7-12 07:16 AM
M. next
2 1,439
hello. i recently came across this question in which a satellite is put into orbit at a point around a planet with...
Apr7-12 06:20 AM
9 1,652
Does the amplitude of a wave changes when the source is moving? I am mainly interested in waves in a medium (e.g....
Apr7-12 05:17 AM
8 4,957

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