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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 47,844
So if I slowly pull the A string first B string will tear apart... Cause the A string will expand and it will pull the...
Apr4-14 05:31 PM
Ezio3.1415
2 199
Hello, I'm trying to make my own physics engine. I've already made one with momentum and an very easy collision...
Apr4-14 01:11 PM
craigi
5 394
Hi I have calculated angular acceleration which changes with time. I also have a moment(torque) which also changes...
Apr4-14 09:36 AM
james6008
4 326
A homogene rod with length "l" is placed vertically, and a nail is stabbed on the top of the rod (now the rod has an...
Apr4-14 06:43 AM
Andreas
0 240
I have just watched a MythBusters episode investigating whether a concrete glider could fly. They conclude that it was...
Apr4-14 02:29 AM
A.T.
14 408
Recently, Facebook suggested solar powered drones could be used to provide internet coverage in remote areas and they...
Apr3-14 03:02 PM
yuiop
5 429
EDIT : solved, thanks :)
Apr3-14 08:57 AM
CWatters
1 171
Is it possible for a magnetostatic field to exhibit vector circulation when no current ( free, bound or polarization )...
Apr3-14 12:58 AM
UltrafastPED
6 334
hey pf! so i have a small question when deriving the navier-stokes equations from newton's 2nd law. specifically,...
Apr2-14 11:06 PM
joshmccraney
6 276
Hi, I need help with the following equations. n = r/r (unit vector in r direction) v =d r/dt = dr/dt n +...
Apr2-14 07:03 AM
knockout_artist
4 298
If you stop cooling a resistor and stop current simultaneously then what happens to the temperature of the resistor in...
Apr2-14 03:05 AM
256bits
2 251
I'm wanting to get the time it would take a vehicle to travel a 1/4 mile coming out of a corner in the ideal world. By...
Apr1-14 06:06 PM
RedRook
17 557
I am trying to use thermodynamics manipulations in order to find \partialP/\partialV (at constant entropy) I tried...
Apr1-14 04:35 PM
rude man
1 244
I am doing a final year project, my Prof gave me 2 prism. He wants me to do so: A white laser is shot on a prism...
Mar31-14 10:18 AM
athrun200
5 301
If I have a pair of coils connected in an anti-helmholtz configuration, with current flowing oppositely in both, and I...
Mar31-14 09:49 AM
UltrafastPED
16 376
On the 2012 AP Physics C Mechanics test, I got confused by the sign conventions for torques on question 3....
Mar30-14 11:59 PM
Simon Bridge
1 231
I was wondering where the derivation of the formula Group Velocity = Phase Velocity + K(dVp/dK)
Mar30-14 01:55 PM
UltrafastPED
1 206
What happens To the force between 2 charges if a metal sheet or a dielectric sheet is kept in between the two charges...
Mar30-14 01:52 PM
UltrafastPED
1 209
suppose a solenoid has N turns What is the Flux through the Solenoid? similarly if a coil has N turns , what is...
Mar30-14 08:25 AM
K Dhiraj Bhak
2 250
How can I figure out how to calculate the heat/cooling exchange rate of water inside pex tubing? I want to build a...
Mar29-14 08:11 PM
Equinefencer
18 4,684
Hello, Question is about equation 5.71 ---to-----5.72 All that was done is algebra or trigonometry? Where do I...
Mar29-14 04:22 PM
knockout_artist
5 472
Hello, I'm currently working on simulations in Solidworks of the flow of air (v = 450 m/s) around a sphere (radius...
Mar29-14 03:48 PM
boneh3ad
1 232
The period of a satellite revolving around the earth earth at surface height is equal to the period of any mass thrown...
Mar29-14 07:26 AM
Ezio3.1415
3 363
First post here. This question has two parts. (1) Connecting the dots between the Impulse-Momentum Theorem and the Law...
Mar29-14 02:16 AM
jstad
2 347
Hello, Are spectral reflectance curves dependent on the interface between the reflector and surrounding medium? For...
Mar28-14 11:50 AM
Andy Resnick
1 279
Recently I am reading the papers in the field of PT symmetry systems. What I am confused is that in these papers,...
Mar28-14 02:16 AM
UltrafastPED
1 237
On page 122 of Born and Wolf's "Principles of Optics" the following equation for the trajectory of a ray of light is...
Mar28-14 12:45 AM
PhilDSP
6 441
I'm trying to understand why a superdeformed nucleus may be represented as bulging perpendicular to the axis of...
Mar27-14 11:05 PM
D H
40 1,393
I'm having a hard time understanding why the electric potential halfway between two equal but opposite charges is 0....
Mar27-14 09:23 PM
ZapperZ
6 524
Im confused by a concept i have run across in Griffiths electrodynamics. E_{out} - E_{in} =...
Mar27-14 12:04 PM
vikasagartha
1 264
Homeopaths assert that dilution of a medicinal substance in a water -alcohol mixture, followed by forceful shaking...
Mar27-14 11:29 AM
Vanadium 50
3 365
If I needed to calculate the kinetic energy of a bar suspended by a rope at one of its ends, in other words, a bar...
Mar27-14 11:28 AM
rmfw
6 376
Consider the Helmholtz Equations with a perturbation p(r) u(r,w) = 0 Does anyone know where I can find resources...
Mar27-14 12:44 AM
sugeet
1 342
Hello everyone, I am having a little difficulty understand precisely what Gibbs free energy is. I have read in my...
Mar27-14 12:25 AM
Andrew Mason
1 270
Hi I am pretty confused on how my book is doing the calculus of electric fields. Basically I don't understand how...
Mar27-14 12:14 AM
Bashkir
1 230
I am currently working on my masters and happened to stumble upon screw theory, of which I have no previous experience...
Mar26-14 06:49 PM
Liferider
6 465
Hello, I've been making my way through Landau-Lifshitz's "Mechanics" book, and I've come across a bit of math I'm...
Mar26-14 02:55 PM
electricspit
9 343
I am really loving this book. But I have come across a figure whose purpose I just don't understand. It is shown when...
Mar26-14 02:53 PM
TSny
4 485
Let's say that we have a system of non-interacting Bosons with single-particle energies given by, \epsilon_{p,m} =...
Mar26-14 09:55 AM
vanhees71
2 258
I am doing a simple steel ball drop test on glass to see if the glass passes the standards. We are dropping 1.18...
Mar25-14 09:54 PM
Tlowe999
8 5,767

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