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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,753 
My E&M professor brought up this problem of considering a uniform charge density, rho, that is infinite in volume and...

Feb2814 02:18 PM
dauto

3 
259 
If you have two sound sources emitting the same frequency and in phase with each other such that the emitted waves...

Feb2814 01:55 PM
dauto

3 
185 
A simple question about elasticity theory/finite element method:
Suppose I have a tetragonal 2D piece of a linear...

Feb2814 03:18 AM
hilbert2

2 
201 
Hi all i hope some one can help but i have a feeling there will be no easy calculations for this one:confused:
Im...

Feb2714 04:58 PM
CWatters

1 
216 
Imagine two parallel conducting plates set at a distance of several meters.
If one charges the two plates...

Feb2714 03:44 PM
johne1618

4 
222 
I just have a quick question, and I'm guessing the answer is no but I wanted to make sure that this was sensible. In...

Feb2714 09:49 AM
clem

2 
204 
Hi,
does the intensity change when circularly polarised light passes through a linear polariser?
I am thinking of...

Feb2714 09:48 AM
dalind

3 
192 
If for some functional ##I##, ##\delta I=0## where ##\delta## is symbol for variation functional has extremum. For...

Feb2614 01:11 PM
dauto

2 
218 
Hello
1. I was wondering why internal energy is usually expressed as a function of temperature and specific volume...

Feb2614 01:20 AM
Maylis

10 
283 
How is electromagnetism different from gravity in that accelerated objects radiate EM waves when accelerated in an...

Feb2514 07:20 PM
Andrew Mason

6 
385 
http://sploid.gizmodo.com/amazingscientistsmakethingsflyaroundinspaceusi1492880964...

Feb2514 02:45 PM
Bobbywhy

2 
193 
Is there a way to derive entropy or free energy without using partition function?

Feb2514 09:13 AM
Useful nucleus

9 
299 
How did Newton come up with
f ∝ Δp/Δt ??

Feb2514 04:57 AM
adjacent

2 
262 
Hi guys and girls,
Just had a question I have been thinking about for a while.
Suppose you have a sound maker...

Feb2514 02:52 AM
Bobbywhy

3 
210 
Ok, so in class last week, I had asked my professor about using the Lorentz Force Law to solve a particular problem. ...

Feb2414 08:51 PM
Ascendant78

3 
233 
Let’s say I have a horizontal rod whose total length = ΔXtotal = 5 inches. However, the rod is made up of two pieces...

Feb2414 06:54 PM
Simon Bridge

1 
184 
Hi,
I know that for the electric displacement vector field \oint D.dS=\sum Q_{c} does this mean that I can just use...

Feb2414 01:03 PM
Meir Achuz

1 
191 
I have a general gauss' law/electric field question.
In calculating the electric field of a cylindrical shape,...

Feb2414 12:59 PM
Meir Achuz

2 
221 
Hi fellows,
I've been looking for "High Repetitive Photocathode RF Guns" for more than a couple of days. It seems,...

Feb2414 11:03 AM
ZapperZ

6 
231 
Hi there! I have a couple of questions for you guys about Spatial Light Modulators and laser beam profile aberrations....

Feb2414 08:56 AM
Choisai

4 
262 
An electric charge produces a Coulomb electric field:
E = dqe r/r3
A current element produces a BiotSavart...

Feb2414 08:38 AM
Harrisonized

2 
189 
What will happen if two batteries were connected in parallel, and how could the total voltage and current be...

Feb2414 07:18 AM
Harrisonized

19 
394 
Hey guys, I was messing around with my guitar (classical guitar) and my amp lately. I put the treble on lowest, bass...

Feb2414 05:07 AM
sophiecentaur

4 
195 
Hi
I want to know what is the diffrences between E=σ/2ε0 & E=σ/ε0
of course I know we use the first for a very huge...

Feb2314 01:49 PM
dauto

1 
204 
consider the image on the drawing at the top (above the yellow arrow)
http://i.imgur.com/zEWCdDS.png
if i had...

Feb2314 06:20 AM
Chestermiller

3 
265 
I'll pose that as a general question, and specifically for sound waves, which Googling did not answer in a...

Feb2214 07:08 PM
mfb

3 
213 
I'm interested in modeling a system where the material varies along its length, thus the conductivity coefficient...

Feb2214 02:58 PM
j_phillips

7 
192 
I wonder if anybody can point me to a good explication of the atmospheric Coriolis effect broken down into base...

Feb2214 05:34 AM
D H

6 
306 
Hi,
And thank you for your time! :)
I've been studying and coding for more than a month on a physic engine for car...

Feb2114 11:50 PM
Deams

0 
167 
Hello
I just read this http://io9.com/scientistsjustcreatedsomeofthemostpowerfulmuscl1526957560 where they...

Feb2114 08:27 PM
Chestermiller

2 
233 
We know that gravity speeds up a body, like a meteor which enters the earth gets constantly speeded up by earth's...

Feb2114 04:43 PM
Simon Bridge

18 
922 
I need to find the moment of inertia of a sphere of radius ##r## and mass ##m## about an axis through it's centre....

Feb2114 02:23 PM
dauto

13 
274 
Earth has a huge angular velocity regarding its rotation. Now let's imagine that the earth has the velocity of 400...

Feb2114 08:56 AM
DaleSpam

1 
192 
I was hoping that someone could explain why these different equations can be found from different sources please.
...

Feb2114 05:36 AM
Philip Wood

5 
247 
It seems to me that for some thermodynamic variables it makes sense to talk of systems in contact with different...

Feb2114 01:45 AM
Rap

2 
240 
Hello all,
I was wondering if it was possible to have energy without an associated force. More specifically, can...

Feb2014 10:27 PM
ahyaa

3 
245 
Hi
I have been looking at canonical transformation using generating functions. I am using the Goldstein book and it...

Feb2014 09:27 PM
dyn

2 
196 
Consider a solenoid with length L and N turns of wire wound around it, filled with a rod of permeability \mu .I wanna...

Feb2014 08:35 PM
Meir Achuz

11 
452 
The Drude model of electrical conduction has the charge carriers being accelerated by an electric field and then...

Feb2014 06:07 PM
Drakkith

2 
202 
Hi all.
I'm a music student and I've been trying to educate myself about acoustics lately.
I'm exploring the...

Feb2014 01:35 AM
maajdl

1 
185 