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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 48,278
Hi guys, I'm trying to implement the enthalpy equation in C++ converting it from an excel macro I found on this...
Sep16-08 11:49 AM
1 1,725
Hello, I have to learn about the classic Perturbation Theory. I'm looking for guides, text books etc about...
Sep15-08 12:09 PM
2 1,120
I know it when I see it but what is the exact definition of a wave? what makes a wave a wave?
Sep14-08 09:04 PM
18 3,275
I'm just learning about linear momentum in classical mechanics and I have a question about it. I'm not sure I...
Sep14-08 12:56 PM
2 985
Hello people, In an AC circuit, how is RMS current and Mean current defined as? What is the practical meaning of...
Sep14-08 03:28 AM
1 1,348
Would it be possible for a symmetric axial vector torque to be equivalent to the shear stress of two uniform...
Sep13-08 05:07 PM
1 2,511
Does anyone have the following book: "Problem Solving in Electromagnetics, Microwave Circuit, and Antenna Design...
Sep13-08 02:35 PM
0 1,008
If two dielectric materials with dielectric constants k1 and k2 and thickness d1 and d2 are within two copper plates,...
Sep13-08 12:58 AM
6 2,454
Anyone can tell me why there is a -ve for the z= -r cot theta for the picture shown below? thanks! ...
Sep12-08 11:36 PM
1 3,366
Wind turbines / hydroelectric turbines - I think the same fundamental Physics applies to my question. The fluid...
Sep12-08 06:25 PM
9 2,864
hi! I have a question regarding work done lifting an object vertically upwards, under water. I am aware that work...
Sep12-08 06:02 PM
Andy Resnick
7 3,499
I guess this question is very easy, but after it occurred to me, it has been torturing me for quite a while. I...
Sep12-08 11:43 AM
6 2,002
May I know what does polarization direction for linearly polarized plane waves mean? In general, does the...
Sep11-08 10:33 PM
2 1,975
Hi Suppose there is a system of N particles and a total energy of E. Now given energy eigenvalues of ε(n) = nhv ...
Sep11-08 10:10 PM
0 1,237
I was wondering why manufacturers only makes these anti-theft systems send out a frequency of 58 kHz. Is there...
Sep11-08 03:12 PM
2 1,195
what is the effect of a magnetic field on a electron? please with equations
Sep11-08 01:47 PM
Doc Al
1 693
The problem gives me a mass at the top of an inclined track. the track is not linear but curved and the bottom of the...
Sep11-08 01:46 PM
2 1,080
I was asked this recently and the only explanation I could come up with was that the Earth is oblate and the...
Sep11-08 04:11 AM
2 2,239
In one dimentional cases, will the velocity of a particle tend to the terminal velocity unregardless of any...
Sep11-08 02:12 AM
2 1,331
Follow the below four steps to amuse yourself 1) Take a semicircular wire. You know that its COM is at (0,2R/\pi)....
Sep10-08 08:08 PM
5 2,410
A magnet surrounded by copper wire spins generating a A/C current down a wire for as long as it spins. Are electrons...
Sep10-08 08:06 PM
9 1,519
I was learning a bit of centrifugal/centripetal forces, and then I asked myself. If at the equator, the Earth rotates...
Sep10-08 07:26 PM
5 19,971
I am currently a grad student. Part of my PhD work will be to formulate a mathematical model of a manufacturing...
Sep10-08 02:22 PM
0 2,300
I'm driven crazy by this question these days. so here it goes. Consider a ball sliding on a frictionless surface with...
Sep10-08 09:20 AM
15 2,275
i've been trying to get the exact definition of a banked angle but so far, i've gotten nothing so i would like...
Sep9-08 10:29 PM
Antenna Guy
1 2,043
Start with: $\frac{d}{dt}$ $\frac{dL}{dx"}$ = $\frac{dL}{dx}$ (d/dt)(dL/dx") = (dL/dx) Now intruduce three...
Sep9-08 08:44 PM
0 676
how can we say that torque is equal to power / angular velocity though we know that torque is equl to I x (change of...
Sep9-08 04:53 PM
4 6,175
We may say a process is adiabatic if it occurs fast enough such that no heat is exchanged from the system.But we also...
Sep9-08 09:14 AM
Count Iblis
4 3,278
The relation between the angles for which the minima occurs for a Fraunhofer diffraction(parallel rays, large...
Sep9-08 07:15 AM
Antenna Guy
8 1,916
I'm a biochemistry major entering my junior year. After completing the requisite general physics course, I found that...
Sep9-08 12:35 AM
4 5,069
Hi, I have read that Thermal Conductivity means: “The thermal conductivity of a substance is the quantity of heat...
Sep8-08 09:38 PM
1 1,981
Please help me to know moment, moment of inertia (mass,area,polar) and difference between them. How can we obtain...
Sep8-08 08:50 PM
0 547
Not sure if this is the right place to ask this, but why is the average shear rate in a cylinder 2/3rds the shear rate...
Sep8-08 06:49 PM
0 1,208
I'm a new teacher to E&M and confess I was a lowly Chemistry Major who needs some help. A proton and a particle of...
Sep8-08 01:23 PM
6 3,061
according to the figure attached below , do we have a coriolis acceleration on the slider and why ? why cant we...
Sep8-08 11:35 AM
1 827
Here is simple counter example to 2nd law of thermodynamics - converting heat into work. Everything is in vacuum,...
Sep8-08 09:19 AM
12 1,793
In a 300kv electrical power line the electrons must be in a conduction band. How does that correlate with work...
Sep8-08 03:57 AM
0 1,365
What is the classical microscopic mechanism for absorption of EM waves? Consider a free charge isolated in the...
Sep7-08 08:38 PM
15 2,064
The D (displacement) vector has only the free charges as source. I heard it is better to work with D than E, because...
Sep7-08 04:09 PM
Andy Resnick
12 1,602
1. When someone loops, and the person blocks, the ball goes out...if the ball really rides up the rubber, shouldn't it...
Sep7-08 07:39 AM
10 9,141

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