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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 47,662
according to the 2nd law of thermodynamics, as time has increase, disorder universally is increasing among the...
Aug10-07 12:24 PM
SpitfireAce
5 2,962
Dear reader, can any on explain me what is a electromagnetic wave????? -benzun please go easy with me
Oct6-03 02:01 PM
Integral
11 4,806
dear reader, What are electrical waves? What are magnetic waves? What are electromagnetic waves? what is...
Oct16-03 11:33 AM
jimmy p
10 3,269
can someone please explain why when banking a curve at an angle so that no friction at all is needed to maintain the...
Feb23-08 09:00 AM
rcgldr
2 1,904
I wonder if someone could explain what is meant by 'End Correction' Any help is appriciated! thanks
May15-05 08:45 AM
Doc Al
3 4,029
If there is a circuit consists of a long thin conducting shell of radius a and a parallel return wire of radius b on...
Apr5-09 09:56 PM
Bob S
2 2,407
Jackson 2nd editon 6.2 and 3rd edition 5.26 are same questions but given solutions in problems are different. 2nd...
Apr5-09 04:39 PM
ber70
2 1,429
please lock thread. thank you.
Jul15-07 12:59 PM
beramodk
0 1,789
A worker on the roof of a house drops her hammer which slides down the roof at constant speed of 4m/s. Th roof makes...
Feb13-04 02:03 PM
Moose352
8 2,419
Hey - I am a bike mechanic with a large interrest in physics. I know that a larger disc brake rotor provides a...
Jul5-14 12:16 PM
90245
20 24,520
Hello everyone: I have heard about paint sprayers that put a charge on the paint as it exits the sprayer - the...
Jan29-11 06:19 AM
bergsj
0 1,500
We know that the energy density of the electric field is: \frac{1}{2}*\epsilon*E2 then, can we infer that the energy...
Jun3-09 09:56 PM
egust
34 5,886
Every book seems that it is a no-brainer that electric fields are zero in a conductor, but I do not understand this. ...
Jan28-11 10:00 AM
Berko
6 2,012
On page 60 of his 3rd edition of Classical Electrodynamics, he discusses the method of images applied to a grounded...
Apr2-11 08:50 AM
Berko
6 1,293
Hello, everyone! Any ideas how to measure drag or drag coefficient on a body of simple shape? We should conduct an...
Nov30-11 11:39 AM
AlephZero
4 4,271
A large open tank, shown below, contains water at a height H. The water is allowed to flow out through a pipe whose...
Dec14-11 05:39 AM
bermet
1 1,988
At parity of maximum resistance before failure (in the case of aluminum, deformation), weighs less aluminum or...
Aug9-13 10:01 PM
Aero51
4 627
Hi all, i have a doubt. How much teeth in relationship to his radius need to have a gear to be optimal? And, if i have...
Sep18-13 09:57 AM
SteamKing
2 359
If newtons third law says there is an equal and opposite reaction how can there be energy transfer. For example if I...
Apr30-13 09:34 PM
SammyS
4 1,432
For example if I punch an object and it doesn't move, am I giving it energy, if so after doing that billions of times...
May1-13 05:16 PM
FireStorm000
3 674
We find in the literature the following relationships between electric field E and magnetic field B B(z)=E(y)V/cc...
Jul11-07 10:52 PM
bernhard.rothenstein
4 23,349
Consider please a conducting wire located in a plane electromagnetic wave propagating in the positive direction of the...
Jul13-07 12:58 PM
bernhard.rothenstein
2 1,724
Defining the period measured by a moving observer relative to a stationary source as T=t(n)-t(n-1) where t(n) and...
Aug30-07 04:19 AM
bernhard.rothenstein
2 3,269
Consider please that an observer is located in a plane sinusoidal and polarized e.m. wave. He erects a metalic antenna...
Mar7-09 08:24 AM
clem
2 977
Consider the following statements: 1. If you move relative to me with velocity V I move relative to you with velocity...
Mar8-09 12:57 PM
bernhard.rothenstein
5 931
Many sources on basic gravity, like this quote from Wikipedia, say: “In the case of a spherically symmetric mass...
Oct3-10 05:04 PM
Bernie G
16 1,630
This is problem from a text book whose solution I don't understand. A small rock of mass 0.5kg is attached to a...
Jun10-12 02:16 PM
BERNIE649
5 1,536
I have a basic question regarding black body cooling. Suppose a person at sea level on a clear night, were to use a...
Jul20-07 08:33 PM
mgb_phys
8 2,421
Ok, so I have a 405nm laser pointer (bluish purple/uv). Had a few miscellaneous glass objects and was shining it...
Mar11-14 02:37 PM
BernieM
15 619
Hi, I just need to ventilate and see your opinions. Charge can be partitioned into groups of particles of one or...
Oct26-13 04:29 PM
DaleSpam
11 955
Can we make a car or vehicle that can ride on the earths magnetic field here within the earths atmosphere?
Jun7-10 11:13 AM
bcrowell
1 605
Hi there! I have a question, I am trying to find the critical point of a phase transition. For example in the Ising...
Nov11-13 04:37 AM
Bersling
0 334
Suppose that we will proof the continuity of the first maxwell equation: So we have div(\vec{E})=\frac{1}{\epsilon...
Nov3-07 09:46 AM
Bert
2 2,359
Where can I find online a good set of rigid body dynamics exercises? Thanks.
Jul19-08 06:05 AM
Bert
2 1,260
This is a question which I have been been tossing around for some time. By looking at gravitationally induced...
Jan8-11 10:32 AM
hermitme
6 5,203
I'm designing a paddle wheel drive house boat and need to do some calculations to see if the parts I have on hand can...
Aug19-09 03:32 PM
bertbcfm
0 3,682
I am attempting to design a base to support a post that will be pulled horizontally at its top. A 2D image of the...
May3-12 05:12 PM
BertSmurf
7 3,315
Could someone show me the simple formula, showing how quickly an item sinks in water. Presumably the formula...
Jul17-08 11:59 AM
bemortu
4 3,132
if i am finding the equipotential lines by using a conducting sheet, power supply, and muiltimeter to find the...
Sep24-07 06:43 PM
Claude Bile
1 3,578
In 3-D dynamics why is the angular momentum not aligned with angular velocity? Does this mean H = Iw is wrong in 3-D ?
Nov14-05 02:11 PM
BobG
2 2,385

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