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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 46,012
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
23 839
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
1 313
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
2 685
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
16 913
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
4 705
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
5 933
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 3,996
I was trying to solve this problem yesterday and I was not able to. I looked it up its solution but my mind is not...
Jul19-14 03:48 AM
0 327
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
1 487
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
2 441
How does one think about, and apply, in the classical mechanical Hamiltonian formalism? From the Lagrangian...
Jul18-14 11:44 AM
0 417
For an IP67 rating (, an electrical enclosure must be submerged to 1m for 30...
Jul18-14 09:25 AM
1 414
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
4 560
Hello. Have you ever seen this experiment? OK, i know why does the...
Jul18-14 04:52 AM
2 939
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
6 824
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
4 953
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
5 704
I am somewhat confused about the connection between divergence and solid angle for a beam. I know individually what...
Jul17-14 08:26 AM
13 877
I noticed this intriguing phenomena whilst messing about in work with a perfect glass hemisphere the other day: ...
Jul17-14 07:13 AM
2 627
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
5 796
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 1,179
Hello everyone, I'm studying the finite strain theory and have come across the maximum dissipation principle. It...
Jul16-14 08:09 PM
3 1,229
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
3 552
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
2 831
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
0 522
Suppose the particle is at distance x from mean position and moving away . The standard formula for calculating...
Jul16-14 08:24 AM
32 2,088
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 1,217
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
2 701
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
5 727
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
4 624
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
2 839
Dear all, I solved the Navier-Stokes equations in Eulerian description. I would like to illustrate it as follows:...
Jul15-14 10:55 AM
3 567
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
0 555
Why does the potential drops when charge pass through a capacitors connected in series.
Jul15-14 09:49 AM
11 752
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
0 528
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
2 691
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
2 981
Why do the capacitance increase with increase in dielectric constant(K) of the medium between the capacitor?
Jul14-14 10:38 PM
2 935
(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
5 748
Consider the following problem: A spring with spring constant ##k## is suspended vertically from a fixed support and...
Jul14-14 07:42 PM
5 762

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