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

Apr2211 05:26 AM
ZapperZ

1 
48,258 
Hello All, I am interpreting a diagram from the following question.
(I didnt have a chance to take thermo and I...

Oct312 03:14 PM
Philip Wood

4 
1,205 
Would the 2 items displayed in the image below act as I expect in a zero G environment?
Assuming that item A had a...

Oct312 10:34 AM
mfb

10 
1,786 
Hello, I've long thought that the coriolis effect was something quite logical (i.e., things luck funny when in a...

Oct312 08:15 AM
harrylin

6 
1,568 
My professor explained it and class and I've tried reading the book but I just cannot wrap my mind around what Gauss's...

Oct312 07:38 AM
andrien

4 
868 
Can someone explain to me how a gyroscope works nonmathematically?

Oct312 07:27 AM
andrien

3 
1,343 
As far as I understand, the wires in classical newtonian mechanics are inextensible, unbreakable and so forth. The...

Oct312 03:41 AM
Studiot

7 
839 
Why does the magnitude of angular momentum remain constant in gyroscopes?

Oct312 02:34 AM
cjl

1 
411 
hi,
It is a bit confusing, because when I say "wave equation" the connotation it invokes in my mind is if I apply...

Oct212 10:49 PM
Simon Bridge

14 
1,808 
Hi All and sorry if this is too easy a question but here goes....
Sines, Cosines and the rest of the trig functions...

Oct212 06:51 PM
starzero

3 
612 
Imagine you are spinning a weight at the end of a string horizontally. As one increases the speed with which the...

Oct212 05:20 PM
willem2

1 
1,092 
this model is interesting in that it is frustrated
any good reviews?
is there any phase transition?

Oct212 04:38 PM
wdlang

0 
645 
I have a quick question regarding the interrelationship between heat transfer and thermodynamics.
Basically, since...

Oct212 12:10 PM
Andrew Mason

11 
1,699 
In a liquid, when we use P=hρg, how do we take the h? I always thought that we take it from the bottom of the liquid...

Oct212 09:52 AM
mikeph

11 
985 
How can a conducting sphere have no voltage at the surface, and yet have a surface charge when there's a charge...

Oct212 03:01 AM
vanhees71

1 
484 
Good Afternoon,
How is it that we are able to get the value of momentum from multiplying mass times the...

Oct212 02:32 AM
MrRobotoToo

11 
2,535 
Coulomb's Law states F = q**2/ r**2
q= statCoulombs
In SI units, F = Ke (q**2/r**2)
q= Coulombs
I read...

Oct212 02:26 AM
vanhees71

3 
1,414 
Hello,
I am having issues understanding all the waves, there are a lot of equations involving sine and cosine..and...

Oct112 11:17 PM
Simon Bridge

27 
1,395 
Hi,
I was unsure how to describe what I wanted using words alone so I created a GIF to help.
...

Oct112 11:10 PM
sl235

1 
559 
PLEASE!!!!!! I need to find a pressuretemperature phase diagram por PURE methanol!!!
it's driving me mad...

Oct112 04:05 PM
Borek

3 
1,371 
any suggestions?

Oct112 10:21 AM
Studiot

1 
676 
Hi
Say I have a magnetic field point in some wellknown direction, and I have linearly polarized light incident in...

Oct112 09:45 AM
Niles

3 
656 
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 
991 
In a lab we conducted in class we graphed angular acceleration vs torque, and found a positive linear correlationeasy...

Oct112 03:44 AM
holtto

1 
1,575 
Hi,
I have a specific question about the derivation of the relative velocity between two molecules A and B from the...

Sep3012 09:11 PM
feynman_freak

2 
1,902 
Heat is defined as "the transfer of energy owing to a temperature difference between two bodies".
Consider a gas...

Sep3012 07:44 PM
Simon Bridge

12 
2,093 
Hi all,
As many of you have seen, I am thinking about spaceship trajectories. This next question falls under the...

Sep3012 06:57 PM
willem2

2 
818 
I came across the following example. I have a mass m' that is suspended from a massless rope which is wound around a...

Sep3012 01:53 PM
mfb

3 
758 
This is a question for a rather odd purpose. I came across a working LEGO model of a Russian tank and I'm trying to...

Sep3012 01:37 PM
chakakhan

0 
839 
On the atomic level, what is entropy? how can I visualise it?
Thanks

Sep3012 01:17 PM
SanfordA

10 
2,306 
Hi
I built with Python a simulation of an ideal gas in 2D, treating the molecules as hard spheres with elastic...

Sep3012 01:04 PM
DrStupid

4 
1,156 
I'm trying to explain to someone why I think the net acceleration of the earth (due to the sun) is nonzero.
My...

Sep3012 10:58 AM
phinds

18 
1,803 
Just refreshing on Gauss's Law.
For a line of charge, we choose a cylindrical Gaussian surface. But if the E field...

Sep3012 09:50 AM
jtbell

6 
1,119 
Say, we have a solution of pure form of Ralanine. Say, the molecule has it's COOH group directed along positive...

Sep3012 03:09 AM
Trave11er

2 
764 
So there's this situation going on:
http://imageshack.us/a/img826/7398/physicsforums.png
Going from the definition...

Sep2912 05:01 PM
jumi

3 
1,639 
To increase a DC generator's turning effect, we increase the number of turns of the coil. How does this increase the...

Sep2912 04:51 PM
Philip Wood

1 
1,362 
Hi,
So I recently worked out a problem in my mechanics class about two people jumping off a frictionless railroad...

Sep2912 04:20 PM
A.T.

6 
1,673 
Hi guys,
I have a question when solving 3D Helmholtz equation derived from Maxwell equations. Normally I will get a...

Sep2912 04:19 PM
mfb

6 
1,008 
I know that simple harmonic motion is a type of periodic motion where the restorative force is directly proportional...

Sep2912 03:02 PM
mathman

1 
439 
Coulomb's law says that the electrostatic force between two electric charges is given by the formula:
Ke*q1*q2/r^2...

Sep2912 12:31 PM
TheDragon

13 
2,497 
Hello everyone :) , and sorry for my bad english
i need your help about something , i study electrical engineering...

Sep2912 08:03 AM
dxtr

0 
691 