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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,826 
I saw a teacher today with a piece of chalk tied to the end of a string (for drawing circles and such on a chalk...

Jul1009 02:52 PM
rcgldr

5 
979 
Hi,
What is a good interpretation of electric permittivity? If you look at Coulomb's law, it seems that the...

Jul1009 10:57 AM
rockyshephear

3 
11,765 
I was a bit surprised to find that the average recorded atmospheric pressures at such locations as Mexico City (2.2 km...

Jul909 11:19 AM
Bob S

24 
15,459 
There are situations when a water drop falls on a really hot metal surface and, instead of evaporating, it kinda...

Jul909 08:22 AM
Edi

2 
2,135 
Hi There
Can some one please help me find a table or chart that has accurate data for water pressures and...

Jul909 07:42 AM
Paul245

1 
4,967 
I have a few extremely simple questions about thermodynamics... I'm trying to self study it, but a few things just...

Jul909 05:30 AM
jmb

5 
1,057 
I am working on a research project in which i need to create a uniform electric field inside of a tube. I am using a...

Jul909 05:25 AM
qais97

2 
5,371 
Consider a case where 2 people are in a car driving in a straight line at sufficient speed. At some point the driver...

Jul909 05:20 AM
vin300

8 
1,377 
How do you calculate amount of power needed to slowly rotate shaft under bending moment? This is not related to...

Jul809 11:59 PM
vin300

1 
2,478 
If you have a certain number of particles such as a few electrons and protons in an area, how would you determine the...

Jul809 11:09 PM
dE_logics

2 
592 
Hi!
I'm interested on how a 45gallon drum (filled with air) behaves when submerged in water. I did some...

Jul809 10:38 PM
hodderman

9 
4,924 
Can anyone help explain how to convert velocities to different co ordinate systems? I've always been shocking at...

Jul809 10:33 PM
DaleSpam

8 
11,212 
Tell me what makes electron have a charge , what is that property of electron due to which there is attraction...

Jul809 04:30 PM
mathman

5 
701 
Hi all.
Could anybody please advise me some good books on Thermodynamics to begin with? My current level of Physics...

Jul809 03:25 PM
Pinu7

1 
1,067 
Does anyone know how to derive the following:
\nabla x \vec{V} = k...

Jul809 02:39 PM
jeff1evesque

0 
553 
Consider a toroidal solenoid powered by a sinusoidal voltage. This will lead to appearance of sourceless electric...

Jul809 09:12 AM
ZapperZ

6 
1,037 
My specialization is Mechanical engineering. So I'm dumb to many of the electromagnetic concepts. But right now, I...

Jul809 08:11 AM
Andy Resnick

9 
2,364 
is there any one who wants to chat about it ? iv tried once here and got not 1 reply,
not even the YOU HAVE DONE IT...

Jul809 07:39 AM
Dadface

1 
673 
Hi all,
I was wondering if anyone knew, or if anyone knows where I can find, the maximum magnetic field that a micro...

Jul809 07:05 AM
htg

2 
1,361 
Hi,
I'm a beginer with COMSOL. I work in diffusion process and I's been trying to simulate with COMSOL a very simple...

Jul809 04:30 AM
Rafa

0 
378 
Hi There
I'm wokring on a miniature steam car ~0.7kg. I've decided that I would like to investigate the feasibility...

Jul709 10:53 AM
Nick Bruno

4 
1,408 
Can a magnetized ship go to the South Magnetic Pole on its own accord? Let's say it is currently located in the...

Jul609 07:00 PM
fleem

8 
1,499 
Can anyone explain how to relate the bunch length and energy spread of a bunch in an electron storage ring to the...

Jul609 03:56 PM
Bob S

1 
875 
Hi!
I'm working on a thing that could be simplified as a pendulum standing straight up. I've found some formulas on...

Jul609 02:31 PM
Bob S

2 
652 
I need an explanation that relates the equation to what I learned about the dot product of two vectors being the...

Jul609 01:21 PM
rockyshephear

36 
2,631 
I have two spectra of a star across the visible and NIR. One spectrum comes from an online resource (CALSPEC) for...

Jul609 10:36 AM
cepheid

2 
649 
can some one explain what chromatic dispersion is? and it helps me finding which colour radiates more heat in the...

Jul609 07:51 AM
Andy Resnick

1 
1,025 
What is the difference between eigenfriquency and normal mode? If, for example, I solve the secular equation (from the...

Jul609 06:08 AM
abid220

3 
8,822 
i want to ask ....how can i model sloshing of fuel in satellite feul tank , to an energy sink model....
can anybody...

Jul509 07:38 PM
vishal007win

6 
780 
I though you might like a light break to solve a problem probably more interesting than the author intended. This is...

Jul509 08:49 AM
Jimmy Snyder

5 
1,338 
can some one explain me why,center of mass of an object can lie outside the surface of the object also?

Jul509 07:48 AM
arildno

6 
1,126 
Hi
if i have lets say a rod swinging on a pivot, and i calculate the moment of inertia around the axis, which is...

Jul509 03:21 AM
Dweirdo

8 
826 
I was thinking about it, and the only thing I could come up with is that it reduces friction with the surface the...

Jul509 12:29 AM
atyy

22 
3,666 
I've read the physical explanation for this eq is that magnetic monopoles do not exist. A poor explanation in my...

Jul409 09:28 PM
Count Iblis

46 
3,186 
Here are more unknows need to slove while I had only two equations which are sum of force on yasix = 0 and sum of...

Jul409 12:41 PM
x850xtpe

7 
1,292 
I'm looking for one clear, simple mathematical definition of actionangle variables. I believe they are also called...

Jul409 12:55 AM
atyy

1 
1,883 
I found interesting to me this topic and tryed to analyze.
http://img505.imageshack.us/img505/6655/49209931.jpg
At...

Jul309 03:23 AM
Joans

5 
1,910 
When you drop a (strong) magnet into a copper pipe, it slows down. Is there an equation for calculating the force? I...

Jul209 05:42 PM
SLG

9 
7,644 
Hello,
I read somewhere that the second derivatives of coordinates in Lagrangian would violate causality. Why is...

Jul209 11:36 AM
Bob_for_short

4 
1,070 
Dear all,
I have a doubt on the validity of one of the Maxwell's equations, the one that states that the divergence...

Jul209 06:35 AM
Born2bwire

5 
690 