
Before posting anything, please review the Physics Forums Global Guidelines.
Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
46,896 
Couple questions for you guys.
1. How does a single electric potential affect the atoms within a conductor. For...

May1208 12:24 AM
pixchips

1 
940 
I have a question about waveguides:
Say your input is an electromagnetic field of a certain time frequency, energy...

Sep508 08:35 AM
fisico30

0 
940 
Hello,
I'm working on calculating a torque value for an engineering project at a new internship I started. ...

Jun612 01:55 PM
Mantaray

2 
940 
Atoms and molecules like to be in their ground state, that is its most probabilistic for them to be in the ground...

Dec709 10:39 AM
Gerenuk

4 
939 
Suppose I have N ideal particles in an enclosure, be it a ball or a cube or some other form. The particles shall...

Oct2910 03:24 PM
dgOnPhys

5 
939 
Hello. New here.
Maybe someone can help answer a question that I was having a disagreement with someone over.
I...

Jan2411 04:05 PM
ksoth

0 
939 
So, am I understanding this correctly? The movement of electrons is the fundamental interaction of all that we...

Sep1311 03:16 AM
Drakkith

3 
939 
Hi
the problem i am dealing with is that we want to heat samples up with a laser in our lab. For estimating the...

Jan2312 12:36 AM
TaBaC

0 
939 
I think we can't have a negative displacement. Is that right?
Acceleration: the change in displacement / change in...

Mar212 06:17 AM
Doc Al

4 
939 
I have a question that involves two electric dipoles that are situated at the origin and are perpendicular to each...

May1912 12:11 PM
neebah

0 
939 
My science teacher gave me this formula for resistance in parallel circuit....

Apr705 03:20 PM
Crosson

2 
938 
Hi,
why is the action defined as the integral of the Lagrangian over time?
i don't see the meaning of integral on...

Jan2509 01:11 AM
o_neg

3 
938 
so that the Kelvin's theorem applies?

Dec2509 09:00 PM
wdlang

0 
938 
This recent thread:
http://www.physicsforums.com/showthread.php?t=386121
leads me to the following thought...

Apr1210 02:31 AM
jrlaguna

5 
938 
Hi,
I have been reading up on the Shell theorem and am wondering if it gets to the same outcome for an oblate...

Jul1410 06:09 PM
linear_shift

0 
938 
Ok first let me say compared to most of you I'm an Idiot... lol...
I understand the basic laws of physics and drag...

Jan1511 01:35 PM
RickinMD

4 
938 
since, B=curl(A), curl(E)= \partialB/\partialt
1)curl(E)= \partial/\partialt(curl(A))
2)curl(...

Dec311 12:20 PM
sk2nightfire

0 
938 
When we open a bottle of soda or champagne, a white cloud raises briefly. Based on thermodynamics, why does it happen?

Apr112 07:05 AM
gafanhoto

2 
938 
Is there any way to deduce pascal law from newton's laws?
Another question: in a hydraulic press, with the smaller...

Jun2012 03:18 PM
luis20

2 
938 
(Headsup: these might be QM questions)
Two questions:
1.) What is it that gives rise to the fact that...

Jul1414 09:16 PM
UltrafastPED

5 
938 
A Man dragged a 51 Kg bag at a 45 degree angle with a force of 400 N. The bag moved along hte pavement with a constant...

Nov204 05:16 PM
Phyzix

0 
937 
i had a beach ball and i deflated it as much as i could. theni tried to open it after i closed the opening. i couldnt....

May2305 07:00 AM
Dr.Brain

2 
937 
Is it possible for a closed system in thermal equilibrium possess two regions with different pressures supposing such...

Feb709 11:22 AM
intervoxel

3 
937 
I'd like to know what formula to use in order to find the following :
Imagine a uniform magnetic field. I am moving...

Dec1509 08:59 PM
fluidistic

6 
937 
I'm a little confused on the temperature of a gas. If gas is heated when compressed, and cools when it expands, what...

Sep2810 07:28 AM
Andy Resnick

5 
937 
I've been pondering this question a while regarding how water freezes.
Assuming the temperature above a lake is 0...

Oct1010 04:04 PM
Jaygo333

4 
937 
I found a website which claimed that 3500 feet of 35mm film was shooting at a maximum speed of 10600000 frames per...

May312 09:49 AM
mfb

3 
937 
I was just curious, sorry if it is already asked,
I was going through a book on photonics and came across the...

Oct112 09:07 AM
Andy Resnick

2 
937 
Hi!
I've been solving problems that apply Bernoulli's equations in *reasonable* situations.
One comes from Serway's...

Feb1713 03:10 AM
rcgldr

5 
937 
hi all, me and my friend were arguing today. We read that a cricket ball requires 11 km/s to leave the atmosphere. Now...

May413 11:07 AM
Pseudo Epsilon

16 
937 
So I posted a question regarding nip and torque and I'm starting to realize that I need to know more about the...

Aug2113 10:37 PM
eigenperson

1 
937 
As it is known to all,the atmospheric electric field does exists.In fact,near the ground its strength is about...

Aug308 12:33 PM
russ_watters

1 
936 
Greetings,
i have the following question:
a sphere with the polarization density of P vector (constant) and...

Nov308 03:16 PM
Zipi

0 
936 
Hello,
My first post! Thank you for any replies!
When looking at U values for windows (= 1/R) they are 99% of...

Jul2309 05:19 PM
Kavy

2 
936 
The classic explanation I remember from school days regarding potential energy went along the lines
"If you carry a...

Sep309 11:19 AM
Cleonis

6 
936 
Hello,
I am currently working on a lab in which we are studying the behaviour of chain of metal bars attached...

Nov2309 01:20 PM
watty

3 
936 
hey guys,
this may be a little naive but, I can someone explain to me the physical aspect of the Hamiltonian?
In...

Mar710 10:14 AM
akshaykatre

0 
936 
Hi guys. I am working on making a haptic device for a baseball simulator. Now the problem is that I want to replace...

Mar3010 05:14 PM
DMajor

2 
936 
I have spent lot of time trying to understand scattering from Goldstein but in vain. The general equation of an orbit...

Sep1311 06:39 AM
Amith2006

0 
936 
A trivial question.
I know that current is the amount of charge passing per unit time across a area.
And Potential...

Oct2913 12:31 PM
Philip Wood

10 
936 