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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 48,245
Of course I am sure this is not a paradox but rather a problem in my understanding of the situation. But this...
Jul20-14 02:29 PM
23 1,535
hi guys I am attempting to solve a problem that has me scratching my head. I have a small connector PCB with one...
Jul20-14 03:33 AM
1 663
Hello. I have two simple questions. 1) I don't understand atmospheric force. I read that it occurs by heaviness of...
Jul20-14 01:39 AM
2 1,203
I am trying to understand the Coriolis effect from some time but i am unable to conceive the idea why the air parcel...
Jul19-14 12:05 PM
Arfur Bryant
16 1,485
I have a doubt that can we increase the intensity of light without changing its amplitude and by increasing its...
Jul19-14 08:48 AM
Claude Bile
4 1,091
Hello again, My handy optics engineer has left the country leaving me with a problem that's over my head. I need...
Jul19-14 08:42 AM
Claude Bile
5 1,337
This question has been asked probably many times, and is inspired by area that appears in denominator of energy flux...
Jul19-14 07:40 AM
35 5,429
If I have 10m lever with a center of the mass 2m from the right side it must mean the shorter arm have greater mass to...
Jul19-14 12:13 AM
Simon Bridge
1 861
Hello PF! This is my first post in a while, and I am pretty excited to hear what you guys think about my idea. I...
Jul18-14 01:36 PM
2 794
How does one think about, and apply, in the classical mechanical Hamiltonian formalism? From the Lagrangian...
Jul18-14 11:44 AM
0 764
For an IP67 rating (, an electrical enclosure must be submerged to 1m for 30...
Jul18-14 09:25 AM
1 759
I was wondering if somebody could let me know if wings inside of a closed environment (tube of sorts) with air flowing...
Jul18-14 07:26 AM
4 939
Hello. Have you ever seen this experiment? OK, i know why does the...
Jul18-14 04:52 AM
2 1,367
Hello so I just want to make sure I Am doing this correctly. also I know there is a magnetic field force formula....
Jul18-14 02:17 AM
6 1,326
I am well aware that objects of varying masses, shapes, and surface areas will fall at different speeds and...
Jul17-14 05:51 PM
Cosmic Al
4 1,445
Does Young's Modulus change with drastic changes in size? For example, suppose you exert a force on the micro scale or...
Jul17-14 12:58 PM
Philip Wood
5 1,124
I am somewhat confused about the connection between divergence and solid angle for a beam. I know individually what...
Jul17-14 08:26 AM
13 1,382
I noticed this intriguing phenomena whilst messing about in work with a perfect glass hemisphere the other day: ...
Jul17-14 07:13 AM
2 995
Does "work done" actually have any real meaningful sense or value? I've got no problem with "work done" when moving...
Jul17-14 12:53 AM
5 1,189
what is the reason of soft x-rays, Is it because when a accelerated electron approaches an atom the electrons'...
Jul16-14 09:43 PM
15 1,659
Hello everyone, I'm studying the finite strain theory and have come across the maximum dissipation principle. It...
Jul16-14 08:09 PM
3 1,679
Hi, I am a bit confused about what exactly is being produced when someone uses a hand generator. I know P=R(I^2). ...
Jul16-14 07:14 PM
3 841
Hi all, I've been reading about biconvex lenses, drawing ray diagrams and real/virtual images. I'm now trying to...
Jul16-14 03:11 PM
2 1,271
Will a Venturi tube with the entry open to a moving fluid act the same as one that has a closed entry with a known...
Jul16-14 10:54 AM
Bob Shapiro
0 851
Suppose the particle is at distance x from mean position and moving away . The standard formula for calculating...
Jul16-14 08:24 AM
32 2,866
Hello everybody. I registered today in this forum and this is my first post. I'm Italian, therefore sorry for my...
Jul15-14 10:41 PM
Cosmic Al
13 1,646
Hello, I recently started going through some lecture notes on linear systems and Fourier optics. (By the way, I...
Jul15-14 06:35 PM
HJ Farnsworth
2 1,062
How does a battery creates a potential difference and what is the intuative way to look at potential difference when...
Jul15-14 02:40 PM
5 1,051
What would have been if the opposite and equal charge wouldnt have been induce on 2nd conductor in parallel plate...
Jul15-14 01:30 PM
4 961
I am wondering if it is possible to shield strong (1 Tesla) DC magnetic fields with high attenuation factor (10^4 or...
Jul15-14 11:00 AM
2 1,137
Dear all, I solved the Navier-Stokes equations in Eulerian description. I would like to illustrate it as follows:...
Jul15-14 10:55 AM
3 839
Imagine to have a drop of water(semisphere volume) on a flat membrane covered by a polymer so that the liquid can't...
Jul15-14 10:28 AM
0 838
Why does the potential drops when charge pass through a capacitors connected in series.
Jul15-14 09:49 AM
11 1,047
Hello. I think that you know an experiment called Cartesian diver. I can use some heads of matches like Castesian...
Jul15-14 08:05 AM
0 781
Let \lambda be a linear density of a rope which is moving into a scale at velocity v. The additional force on the...
Jul15-14 02:57 AM
2 982
I just wanted to clear one thing... in metals what type of potential the electrons are subjected to..?? Is it...
Jul14-14 10:51 PM
2 1,341
Why do the capacitance increase with increase in dielectric constant(K) of the medium between the capacitor?
Jul14-14 10:38 PM
2 1,265
(Heads-up: these might be QM questions) Two questions: 1.) What is it that gives rise to the fact that...
Jul14-14 09:16 PM
5 1,046
Consider the following problem: A spring with spring constant ##k## is suspended vertically from a fixed support and...
Jul14-14 07:42 PM
5 1,052
I was wondering if someone could show me the derivation of Faraday's Law of induction from the more fundamental...
Jul14-14 07:11 PM
3 945

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