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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 47,879
Hi all, I'm having some difficulty with electric flux. Does electric flux stay the same if you double the...
Aug16-08 04:07 PM
atyy
6 2,549
With all the mechanical forces in statics problems I can assume the sense and I might get a negative answer which...
Aug16-08 11:22 AM
merryjman
2 1,229
Hi all, new guy here. I am trying to understand the laws that govern a diesel motor. I know it compresses air at about...
Aug15-08 10:07 PM
DaleSpam
1 1,207
Hi, I was wondering about the path a charge placed in a solenoid that was flown through by alternating current...
Aug15-08 05:10 PM
h0dgey84bc
1 1,343
hello I just can't swallow the idea of mechanical advantage. * if you have a 10 KG mass , you need , say , 100 N...
Aug15-08 04:08 AM
ali171
6 1,677
I have a simple lever with two points of equal force, each at a different distance from the fulcrum. --- What I...
Aug14-08 08:43 PM
russ_watters
25 3,292
Looking for some pointers on how to approach this problem: I'm considering a system like the following - two...
Aug14-08 10:08 AM
matematikawan
5 8,257
I know a reference frame moving at constant velocity is a inertial reference frame. Is a reference frame that is...
Aug13-08 02:31 PM
DieCommie
3 1,675
what would be the speed of a bullet on decline fired from a pistol. firing angel is 45Deg. What would be the speed of...
Aug13-08 04:31 AM
tiny-tim
1 1,340
In an electric current there must be forces that push electrons in a general direction (current). My question is, what...
Aug13-08 12:09 AM
Phrak
12 2,618
Part of my early morning ritual involves making myself a nice cup of coffee. I pour my aromatic brew into the cup...
Aug12-08 06:26 AM
Aquafire
0 972
I recently caught a question that I realized was far more difficult than expected. Someone asked how hard they would...
Aug11-08 06:37 PM
Topher925
10 3,264
Does anyone know how ships are degaussed exactly? I know that basically very thick electrically conducting cables are...
Aug11-08 01:27 AM
greglaakso
11 5,178
Hi there! I was wondering if you folks could give me a little enlightenment. Two days ago, I read a quote which led...
Aug10-08 12:36 PM
Crosson
4 1,094
My friend and I were playing cards, and he was shuffling the deck. He claimed that the longer he shuffled, the 'more...
Aug10-08 11:05 AM
Ygggdrasil
5 4,792
i have this doubt in teh famous brachistrone problem The Problem we have to find teh path y(x) connecting two fixed...
Aug10-08 06:31 AM
dy-e
8 5,391
i need help understanding............im under the impression that even though the moon orbits the earth, and the earth...
Aug10-08 06:08 AM
tiny-tim
9 3,137
Consider, a particle at position 0 at time = 0 Lets say it moves to 0.5 after 0.5 seconds It moves to 0.75 after...
Aug9-08 08:31 PM
HallsofIvy
18 1,976
Looking at gravitational and electrical interation relations, I had an idea: F = kQq/r^2 F = GMm/r^2 Couldn't it...
Aug9-08 11:32 AM
CompuChip
19 3,640
Can someone tell me what the value of d is in Faraday's Law? Thanks in advance.
Aug9-08 05:26 AM
Defennder
1 1,151
Hi all. I'm doing a little program for my own fun and I'm having troubles with the physics. I need to be able to...
Aug8-08 04:49 PM
NCGrimbo
5 1,234
is it necessarily true that we have \frac{\partial T}{\partial q}=0?
Aug8-08 12:48 AM
pardesi
3 1,099
hello, I was wondering if there is an equivalent gauss' law for gravitation like: \Phi=4\piG*Menclosed any help...
Aug7-08 10:26 PM
Phrak
5 1,505
From wikipedia: In metaphysics, impenetrability is the name given to that quality of matter whereby two bodies cannot...
Aug7-08 11:29 AM
Kasper_NYC
7 1,559
Hi, I'd appreciate it if somebody would clarify a couple of things for me. First, it looks like the concept of...
Aug7-08 09:52 AM
Pavel
0 1,535
This is from my Physics practical experiments. The experiment is to find the refractive power of the prism for...
Aug7-08 03:42 AM
lichen
11 11,403
Can a classical circularly-polarized plane electromagnetic wave, that's bounded in time, transfer net energy/momentum...
Aug6-08 08:45 PM
cesiumfrog
18 3,433
In the solution of a pendulum attached to a wheel problem, I was initially suprised to see that a term of the form: ...
Aug6-08 04:15 PM
samalkhaiat
6 1,998
Hello everyone, Why is it that in projectiles we learn that a mass launched horizontally will always fall towards...
Aug6-08 02:50 PM
mtanti
9 1,409
It is clear that Newton's first two laws of motion deal with motion: the velocity of a moving body is persistant, and...
Aug6-08 03:50 AM
Defennder
5 1,602
1. suppose a long solenoid is connected to a DC source and after a long time steady state has reached. And suddenly...
Aug5-08 01:05 PM
i_island0
4 2,327
If two conductive plates are placed close together separated by a suitable medium to act as a dielectric. It has an...
Aug5-08 10:44 AM
Defennder
6 2,925
What are the ways (both natural and artificial) in which em radiation is generated? Here is one of the methods: We...
Aug5-08 08:38 AM
Tw15t3r
5 1,820
Hi, It is supposed a metal container hermetically closed and completely filled with water; the container is...
Aug5-08 07:01 AM
Kasper_NYC
3 2,517
How is permittivity a function of frequency ? And how is permittivity a function of frequency in relation to the...
Aug4-08 09:59 PM
morrobay
2 4,129
Does dew point temperature remain constant over altitude, pressure, and density? I have to admit that I am having...
Aug4-08 08:06 PM
tuoni
5 2,624
Could someone explain all the reasons that balls made to bounce are spherical? Bouncing = collision, so I guess I mean...
Aug4-08 06:39 PM
arildno
2 911
I have this question: A particle of mass m moves under the influence of a central force; F = -grad (V) where V(r)...
Aug4-08 09:55 AM
schrau24
0 3,864
It's been a while since I've been in science class and I was wondering if this was theoretically possible. It's so...
Aug4-08 04:03 AM
ZharAngel
1 989
Hi Is there any connection between creativity and level of order? wikipedia - Creativity (or "creativeness")...
Aug3-08 01:42 PM
vanesch
1 1,433

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