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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,748 
Hi
I have been looking for some simple equations that describe the turning moments on the rotor as wind direction...

T 05:21 AM
james6008

2 
59 
What's the original definition of Ohm, ampere, volt and coulomb,
And which unit was defined according to the other...

T 04:00 AM
vanhees71

16 
287 
"A capacitor is being charged from a battery and through a resistor of 20 KOhms. It is observed the the voltage on the...

T 01:56 AM
astro2525

9 
177 
Hello,
I am working on a project in which I want to project a projection back into a slide projector using a...

T 01:54 AM
LuukS

10 
152 
I am reading about the Asimov pendulum (see figure)
The aceleration in spherical coordinates is
##\vec{a} =( R...

T 01:39 AM
Simon Bridge

1 
93 
Hi
1) I am reading Pippard's Classical Thermodynamics and was confused by one of his examples in the attachment.
...

T 12:13 AM
Red_CCF

60 
1,023 
Hello,
I`m a bit confused about PV work. Here is the situation I am facing.
δw = P dV and dw = F dx
δw is...

Y 10:16 PM
Soumalya

57 
1,054 

 
 
 
From the result of an experiment it seems to be that suction does indeed cause a force that causes a vacuum to move...

Y 02:51 PM
D H

9 
198 
Dear Experts
A bicycle has the following gear setup. I like to get your advice what is the effective gearing and...

Y 02:15 PM
Andrew Mason

1 
101 
The title is enough

Y 04:35 AM
mfb

22 
359 
Looking for a way to increase magnetic forces in electrical devices, an option is reduce the air gap, but some times...

Apr1814 09:04 PM
Simon Bridge

5 
152 
Helloo,
I don't understand how one arrives at the conclusion that the hamiltonian is a generating function.
When...

Apr1814 08:27 PM
vasilis

4 
160 
Hey guys,
It has been a while since I've done anything to do with magnetism and was wondering if I covered one side...

Apr1814 06:33 PM
TumblingDice

1 
99 
If you'll allow me to disregard the effects of Strong Interaction, how would I calculate the Electromagnetic Force...

Apr1814 04:12 PM
Drakkith

4 
155 
Since Lagrangian is a function of q, q dot & time, then why in describing the Hamiltonian (H), L does not involve time...

Apr1814 01:57 PM
JonnyMaddox

7 
234 
Dear Friends,
I carried out an experiment of sudden release of oxygen (open nozzle) from an oxygen cylinder used...

Apr1814 11:16 AM
curioso77

8 
166 
I'm having a hard time understanding air flow caused by pressure differentials. Given the following contextual image,...

Apr1814 06:54 AM
Chestermiller

13 
222 
I hope this is the right place to ask this. It is an experiment question.
I have a 785 nm laser and a 1550 nm laser...

Apr1814 04:38 AM
UltrafastPED

4 
137 
When a wire is placed in a magnetic field, Lorentz force acts on an electron in a direction perpendicular to velocity...

Apr1814 04:16 AM
mfb

1 
118 
Hello,
who can suggest me a book, or a PDF where i can find an introduction to Liouvillian operator in statistical...

Apr1714 05:09 PM
oliveriandrea

0 
110 
Hi, all. Here is an expression about kinetic energy from analytical dynamics of Haim Baruh which confuses me.
...

Apr1714 04:09 PM
JonnyMaddox

4 
159 
Hi, all there are equation in the pic but I cant understand them. I know workenergy principle which
is W= F * X...

Apr1714 04:03 PM
dauto

2 
142 
Hi,
I have a 1m long, 10mm ID vertical tube attached to a vacuum system. I have a known flow rate of the air down...

Apr1714 12:21 PM
bigfooted

1 
103 
Here is an excerpt from my textbook:
"Ordinarily, this charge would simultaneously generate so large an electric...

Apr1714 11:23 AM
lonewolf219

2 
128 
I get that by getting a charged object near an uncharged one, charges of the opposite sign are induced on the surface,...

Apr1714 11:09 AM
Philip Wood

3 
172 
Since 2 splitted beams meet at ONE spot later on, we have just one beam which flows to the detector, therefore I...

Apr1714 10:24 AM
Goodver

6 
148 
Hello experts!
I was taking class of optical fiber and communication.
My teacher was teaching the class via...

Apr1714 09:29 AM
shayaan_musta

7 
167 
From my understanding, normal and anomalous dispersion are because the phase velocity is a function of k so it is...

Apr1714 08:04 AM
vanhees71

2 
94 
From this figure we could see the axis of rotation of wheel is y axis and it's translational motion is along x axis ...

Apr1714 07:32 AM
shivaniits

5 
167 
Hi.
Btw: I haven't studied statistical physics yet, but I have studied the introductory course on thermodynamics.
...

Apr1714 07:11 AM
ffia

0 
98 
Hello,
I need data (articles and books) about what connection there is between the speed (or the power) of a...

Apr1614 09:16 PM
curioso77

4 
218 
Suppose we have a planet of mass m orbiting a larger one of mass M along an elliptical path. If we use polar...

Apr1614 06:17 PM
zalook

0 
138 
So, let's say a spacecraft at a large distance from any star needs to dump a tremendous amount of stored electrical...

Apr1614 03:08 PM
nasu

3 
167 
sir in the graphs of electric field due to binary charge configuration
why some curves are below x axis and some...

Apr1614 12:53 PM
jtbell

3 
99 
Hi I am kind of Confused about an example in work done:
It says that a man applies 250 N parallel to the slope to...

Apr1614 06:30 AM
Doc Al

3 
238 
Is it possible to send enough light down a fibre optic cable to produce say 1000 Lumens? How would I go about...

Apr1614 02:14 AM
UltrafastPED

6 
142 
Does a shock wave have a finite value that can be shared within a system?
For example, if I explode a some...

Apr1614 01:08 AM
Simon Bridge

1 
115 
http://s22.postimg.org/r41250uoh/reactive_moment_force.jpg
Assume that the arbitraryshape object shown has a...

Apr1514 09:41 PM
FactChecker

6 
136 
After I have an expression for the streamfunction in a problem, I can differentiate to get the tangential and radial...

Apr1514 06:46 PM
wahaj

4 
101 