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

Apr2211 05:26 AM
ZapperZ

1 
47,906 
Hi,
I conducted an experiment with the Michelson Inteferometer to obeserve white light fringes but I cannot explain...

Apr307 04:19 AM
Baggio

8 
8,808 
(ok i not sure where this topic goes so ill take a guess its here)
ok, I hear that nothing is 100% efficienct. some...

Feb2607 02:18 PM
KingNothing

8 
5,174 
If the earth was flat, and there were no such thing as gravity, and it, along with all the celestial bodies,...

Feb2207 04:11 PM
ZapperZ

8 
1,354 
Well,I think this is interesting.I invite people to think over it.
consider a charged spherical shell.Throughout its...

Feb2807 12:34 PM
Kolahal Bhattacharya

8 
2,027 
I'm a newbie, so please correct me if this is not a good post.
Question:
1
The absolute speed of...

Apr1307 12:36 PM
rbj

8 
8,565 
Does inertia apply to EVERYTHING in the universe? Even subatomic particles? Or is there a certain mass limit where...

Mar607 02:10 PM
Zeit

8 
3,299 
Hi,
Let L be an inductance, then you find the following formula in textbooks (high school level):
U_ind =  L...

Mar807 07:20 AM
arcnets2

8 
2,162 
What does the subscript (\theta, \phi) mean on the laplace operator? i.e.
{\nabla}^2 V_{(\theta, \phi)}

Apr1007 03:25 PM
Meir Achuz

8 
1,417 
I tried to do a post here but it didn't take so I'm going to put something much shorter that asks the same thing.
I...

Mar3007 07:27 PM
FulhamFan3

8 
1,423 
Firstly, this is NOT a homework question although it may sound like it. My question pertains to this (I believe rather...

Apr1707 05:53 PM
Guardian

8 
1,882 
When we apply ampere's circuital law to finite length wire,we get the wrong answer.Why is that? The symmetry rule is...

Apr2207 11:19 AM
NeoDevin

8 
5,997 
What does mean a perfect elastic collision and a perfect inellastic collision? Do they really exist or it is just by...

Apr2007 07:52 AM
lpfr

8 
2,740 
Is it possible for the kvector to be a function of space (in the context of EM waves)? What would it imply if this...

Apr2907 06:13 PM
robphy

8 
2,662 
How much potential energy is stored in a tied shoelace?

Apr2907 01:45 AM
russ_watters

8 
1,224 
Suppose, there's an inclined surface, and a sphere, with radius R, is rolling without slipping. The Lagrangian is
L...

May1607 04:11 PM
Doc Al

8 
2,366 
shouldn't an object that is being push away from earth with the same force accelerate as it goes up in elevation, also...

May2307 06:15 AM
cristo

8 
905 
an object with mass m=0.1kg is thrown with an initial velocity v0=20m/s in a viscous matter that exercises a resistant...

May2607 03:46 PM
Doc Al

8 
1,293 
It is a mechanics discussion regarding a problem of electrostatics.
Couple of months ago I dealt with a...

Jun207 10:09 PM
neelakash

8 
1,160 
There is a utube which its diameter on the left hand side is smaller than the right hand side.
It is filled with...

Jun1507 12:49 PM
Doc Al

8 
4,630 
Can anybody please explain these theories, and what they do so differently than Newton's mechanics? I cant really get...

Jun2007 02:28 PM
Aidan130791

8 
3,054 
Greets all, i'm attempting to build a small physics engine that manages linear and angular forces. Please bear with me...

Jun2707 04:25 PM
g9icy

8 
1,371 
Say I have two bodies, idealized as points with mass, in Galilean spacetime A^4. When thinking about the 2body...

Jul1707 04:14 PM
cliowa

8 
1,470 
I have a basic question regarding black body cooling. Suppose a person at sea level on a clear night, were to use a...

Jul2007 08:33 PM
mgb_phys

8 
2,436 
Suppose we have a gas of randomly oriented (and in random motion) electric dipoles. Obviously the dipoles do not...

Sep407 07:57 AM
genneth

8 
1,969 
Does anyone know where I can find information related to the physics of straightening a bow from its curved state to a...

Sep1707 10:39 AM
mgb_phys

8 
3,281 
Hello all,
I have recently taken up the study of electromagnetism because I found that I lacked severely in this...

Sep2607 12:04 AM
Maxwell's Beard

8 
1,266 
say for example there is a pulse through a string .then what exactly is wave speed or for that matter in case of...

Sep2707 10:01 AM
f95toli

8 
8,410 
this was one question i've always thought upon right from the time i have learnt abt forces and velocity .. a bus...

Oct107 04:38 AM
app_pp

8 
1,341 
If I have a charged insulating hulahoop with the property that every point on the ring has exactly the same charge...

Oct207 01:00 AM
jimmd

8 
5,992 
Some friends my argue about the ball spin and curve. At first I thought it can be explained by bernoulli effect.
But...

Oct1507 06:32 PM
pixel01

8 
2,264 
Do the BiotSavart Law, Coulomb's Law, and the Law of Charge Conservation contain the same information as Maxwell's...

Oct1507 11:32 PM
vanesch

8 
2,310 
# Hi
# My instructor of EM course wrote two formulas on the blackboard and asked whether they are correct and what...

Oct3007 09:09 PM
blechman

8 
2,022 
Hi all,
I fell on those pics on the web (see attached files).
Now, there are people who tend to think this is...

Nov1007 03:19 PM
Scorpixx

8 
2,346 
What do we mean in mathematical terms intensity of light at this point is I and when we say Power of light is P

Nov907 10:10 PM
pardesi

8 
3,400 
Recently, the New York times ran the obituary of Paul Tibbets who
was the pilot of the plane that dropped an atom...

Nov1307 04:01 PM
cesiumfrog

8 
4,990 
hi,
i would like to ask a physics question concerning two basic kinematics equations: d = v t and the projectile...

Dec607 01:28 AM
crowdiddly

8 
5,213 
As I understand it, conductors interact with EM waves (light) in such a way that
prevents transmission through the...

Dec1307 09:24 AM
silverrose

8 
2,697 
Suppose we have box with a volume V which is divided down its middle.
So the box is split in two sides with equal...

Dec607 03:08 AM
LTP

8 
2,858 
If I have some arbitrary Thermodynamic system, and I want to find the equilibrium state what do I do?
Lets say that...

Dec1107 08:58 AM
Count Iblis

8 
2,287 
Is it possible that the the small vibrational energies that make up "heat", are caused by the pull of electrons...

Dec1407 02:57 PM
Ben Niehoff

8 
1,150 