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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 47,884
How does circular motion in a cone without gravity work? If I have an object and I let it circle through the inside...
Apr29-12 09:29 AM
Cleonis
2 1,409
I do not know the exact electrochemical reactions which make a battery work, but I understand that the essential...
Apr29-12 08:30 AM
phinds
16 3,286
I've read that permittivity is resistance offered to flow of field lines,But vacuum does not have anything in it to...
Apr29-12 08:27 AM
PhilDSP
22 3,215
Ok , so I was wondering if you could legally build a cyclotron accelerator , I am fourteen years old , so if there...
Apr29-12 06:53 AM
Vanadium 50
6 1,104
I would like to know if pressure is different in water due to the difference of gravity (like 1/d) ? If yes, why a...
Apr29-12 06:32 AM
Gh778
16 1,329
Hallo everyone. I had a equation about energy in a form of "rotational kinetic energy". Imagine this situation...
Apr29-12 06:27 AM
jartsa
15 1,528
right now, I'm following the MIT thermodynamics video lecture. I've gone thru dU = dw + dq (d for "is path...
Apr29-12 03:52 AM
mSSM
1 4,150
So given any vector field V(x, y, z) in three dimensional space, is it possible to create an electric field that is...
Apr29-12 03:05 AM
vanhees71
1 822
By definition total energy of a system= (internal energy U) + K.E + P.E and mechanical energy of a system= (flow...
Apr29-12 01:14 AM
Ritz_physics
0 512
Hi, I'm looking for the derivation of (BH)max of a permanent magnet, (BH)max= {Uo*(Ms)^2} /4 Uo =...
Apr29-12 12:37 AM
physlover1015
0 1,120
Hi, I'm having trouble understanding what the relation is between the impulse of a force during a collision and the...
Apr29-12 12:31 AM
Froskoy
3 1,344
I was curious about this subject after it came up on my last physics test. However my teacher never covered this...
Apr28-12 10:52 PM
ozone
4 2,008
A question about Thermodynamics, if someone would help with that... I understand a steam engine that follows the...
Apr28-12 09:33 PM
watermotorman
5 1,505
Hey all, I'm just working through the london theory of superconductors. I've dervied the london penetration depth,...
Apr28-12 01:31 PM
Bob S
1 863
Hello, I'm a high school senior and I'm trying to find an equation to calculate the force in the x direction...
Apr28-12 12:11 PM
no clue stu
0 1,218
there was this question that i saw in a book and it also had an answer . (this is not a homework question) The...
Apr28-12 09:54 AM
mfb
1 885
I have seen solutions of many problems in which an object going in straight line has angular momentum, especially...
Apr28-12 07:54 AM
sweet springs
2 3,012
As we know a circle view at an angle appears as an ellipse , as you see in the picture, the center of the camera aim...
Apr28-12 01:11 AM
OFF_Smog
2 804
IF F=MGcos θ AND THE ANGLE BETWEEN F AND D IS θ THEN WILL THE WORK BE MGcos2θ?
Apr27-12 07:54 PM
K^2
3 700
There is a spherical lead ball with a spherical cavity. It is heated. The size of the cavity increases. Why does it do...
Apr27-12 06:25 PM
Drakkith
10 1,809
Hi, I have a question about lightning return strokes. It makes sense when I think about the return stroke on its own...
Apr27-12 03:15 PM
Bobbywhy
5 1,409
Hi there. I was just wondering how does a force actually casue motion of body .. and what are the factors that...
Apr27-12 12:23 PM
A Dhingra
12 2,234
I am unsure about the virtual displacement and work definition even after looking through the definition and seeming...
Apr27-12 11:54 AM
Hassan2
4 1,196
Mythbusters did a test to see if a water heater would shoot through the roof of a two story building (home). They...
Apr27-12 09:15 AM
K^2
4 1,108
I'm quite curious as to whether there is an equation (whether it be in scalar, vector, or tensor form) that defines...
Apr27-12 09:09 AM
Ali, Ahmed
3 1,308
When i apply torque on a body, it will rotate around whcih axis? I guess its the axis along centre of mass but i don't...
Apr27-12 08:43 AM
mfb
3 965
So, I have been thinking about this idea for a long time. I have heard that if you travel behind a semi-truck, then...
Apr27-12 08:22 AM
Lsos
2 583
Hi physicsforums mates, I came across an interesting application question online on optimal mass / velocity. The...
Apr27-12 05:49 AM
haruspex
9 2,427
Hi guys, I came across a pretty weird question regarding electricity in a parallel circuit. There are two branches of...
Apr27-12 03:35 AM
sgstudent
11 1,237
Hi There is lots of text, but it is actually just a presentation of facts and thoughts to explain where I am in all...
Apr27-12 12:46 AM
Drakkith
1 839
I have a question about calculating induced surface charge: Consider a system composed of an infinite grounded...
Apr26-12 10:25 PM
haruspex
19 4,941
Hi everyone, I've been reading about electricity lately and I've run into a question that has been bugging me for a...
Apr26-12 08:18 PM
rcgldr
4 3,913
Hallo everyone! I'd like more about the energy in the magnetic fields of a magnet is there major amounts of energy?...
Apr26-12 04:57 PM
mfb
2 908
"Setting Your Thermostat for Maximum Energy Savings" by Jeffrey Orloff claims that during warm months, setting an air...
Apr26-12 03:20 PM
QuantumPion
13 3,695
Can anyone tell me the value of cyclotron frequency with full mathematical proof and explanation?
Apr26-12 01:49 PM
Bob S
2 631
For a wave travelling from a medium with refractive index n1 to n2 with n2 > n1, the amplitude reflection coefficient...
Apr26-12 12:00 PM
Born2bwire
1 2,738
In Feynman lectures vol 2, chap 28, it is given that for an electron at rest, the net self force exerted on itself is...
Apr26-12 08:49 AM
Dickfore
13 1,678
There are (at least) two issues regarding the presence of ferromagnetic materials around an MRI scanner (of strength...
Apr26-12 07:54 AM
dhigger
0 818
I am doing a presentation on energy as part of a class project.As part of the presentation I would like to physically...
Apr26-12 05:50 AM
Philip Wood
3 911
Hi, In class we were discussing the effects of a two bar magnets being dropped through a copper tube at around the...
Apr26-12 03:43 AM
Xiao10
2 1,301

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