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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,837 
Both of the highlighted equations deal with a standing wave. However, they are slightly different in the sense that...

Apr2413 05:58 AM
Simon Bridge

1 
559 
I know there must be something wrong with the following derivation based on Maxwell's equations but could not figure...

Apr2413 01:26 AM
Jano L.

6 
614 
So I want to know what happens when granules are subjected to forces while around other varieties of granules. My...

Apr2313 08:32 PM
Andy Resnick

1 
511 
Hi all, this is my first time posting.
This may seem too vauge but could a 2m long linac accelerating electrons...

Apr2313 04:40 PM
berkeman

12 
503 
If one planet has a higher gravity than another, would that mean that it would progress through time at a slower rate...

Apr2313 01:10 PM
nitsuj

11 
686 
Hello everyone!
I am having a bit of a problem understanding a paper. Usually the authors use the...

Apr2313 03:09 AM
chrisewolf

0 
446 
So my professor has been using an equation to find the magnetic field of a wire, but the equation is not present in...

Apr2313 02:25 AM
raopeng

8 
652 
If they're orbiting Earth, then they're in uniform circular motion. And if they're in uniform circular motion, then...

Apr2213 05:48 PM
sophiecentaur

131 
6,534 
So I recently came across this video in youtube: http://www.youtube.com/watch?v=TKF6nFzpHBU. The vibrations of the...

Apr2213 04:38 PM
sophiecentaur

6 
540 
I've been hearing superconductors is the future of technology and what not, but then i questioned what the actual uses...

Apr2213 12:56 PM
dbmorpher

2 
390 
Hello,
I'm having some trouble understanding the concept of two function convolution in Fraunhofer diffraction.
...

Apr2213 11:48 AM
Andy Resnick

1 
530 
Hello,
The energy density of an electromagnetic wave is ε_{0}E^{2}. To calculate the energy flux, at least in the...

Apr2213 08:52 AM
jtbell

2 
583 
Hi people, I have a question. Where can we apply the first law of thermodynamics? I mean is it applicable between 2...

Apr2213 07:38 AM
DrClaude

1 
471 
Hi guys,
So textbooks have it that: "Two Lagrangians differing by a total timederivative of a function of the...

Apr2213 01:18 AM
WannabeNewton

9 
638 
Is the effect of gravity ever considered in particle accelerator experiments? I would think not with all the high...

Apr2113 11:45 PM
jimhasty

13 
1,070 
Hi everyone,
Today I noticed something curious while I was drying a blanket in a dryer. The dryer was turning and...

Apr2113 06:11 PM
CWatters

1 
371 
Hi. Does anyone know a book or webpage where I can find specific optic rotation values for solutions with different...

Apr2113 04:27 PM
assed

0 
427 
In an irregular shaped charged conductor will the electric field E at all points within the conductor be zero? If yes,...

Apr2113 02:59 PM
vanhees71

3 
528 
When doing calculations on AC circuits, what is in your opinion the best notation? Here they mostly use complex...

Apr2113 02:41 PM
BruceW

5 
448 
My friend and I are working on a realistic FPS sniper simulator and we wanted to be able to realistically model things...

Apr2113 09:54 AM
Raddy13

3 
1,016 
If I pluck a string, a wave begins to propagate throughout the string. From experience we know that this produces a...

Apr2113 08:28 AM
technician

1 
326 
I'm a little unsure of my own answers to these questions. Hopefully I'll clear up my misconceptions.
1. If I...

Apr2113 06:38 AM
HomogenousCow

1 
344 
Hey everyone!
I am struggling with the following problem:
I am calculating the ratio of photons emitted to...

Apr2113 02:18 AM
chrisewolf

0 
367 
The equation for the change in momentum for total absorption of electromagnetic radiation is ΔU/c and that for total...

Apr2113 01:07 AM
virtuosowanaB

2 
398 
When you use Faraday's law to calculate the induced electric field due to a changing magnetic flux, you integrate over...

Apr2013 04:18 PM
vanhees71

2 
487 
Hey. Say you have an RLC circuit with an AC supply. Then I=ei(ωtα). My question is: will α always exist, ie will the...

Apr2013 02:57 PM
gnurf

1 
453 
Hi all,
Lets consider the situation illustrated in the attached figure. A permanent surface charge density \sigma...

Apr2013 12:41 PM
Barloud

8 
460 
Now consider two objects,A and B. A has a higher specific heat capacity that B. When both object is subjected to same...

Apr2013 10:50 AM
Yh Hoo

2 
451 
Hello,
I was looking at my textbook reading about cyclotrons, and I was confused about the Dees, as well as why is...

Apr2013 09:40 AM
technician

3 
341 
I have a question which states that a car's speed is 110km/h. Should I assume this speed to be 3 significant figures...

Apr2013 07:15 AM
ZapperZ

73 
2,281 
This is a very sound stupid question, but I'll go ahead anyway.
Current is defined as the displacement of charge...

Apr2013 03:34 AM
Nikitin

4 
559 
I was having trouble while thinking about the unreal source for refreaction through a lense... In lense light is...

Apr2013 01:24 AM
Ezio3.1415

25 
1,226 
Sorry about the crude drawing but here's the question. If you have a ball in a hollow pipe, which is being rotated...

Apr1913 09:41 PM
noagname

3 
573 
In my Physics I class, we started learning about wave functions in the form:
y(x,t) = sin(kx ± ωt ± ∅) or y(x,t) =...

Apr1913 05:35 PM
fazio93

5 
615 
Hello all,
I have a quick, albeit probably ignorant (forgive me) question generated by (bu dum) observations of a...

Apr1913 03:33 PM
tomcat017

4 
867 
EDIT: I'm not in my sharpest moment. I just found a bunch of posts that discuss this. I'll read them and update this...

Apr1913 02:46 PM
JRPB

4 
636 
Hello!
When studying the law I noticed that the change in magnetic field (i.e the magnet's motion) is = to the EMF...

Apr1913 02:41 PM
Wiz700

2 
618 
I'm revising for an exam, and this is what I think I know so far.
It will really help if someone can confirm these...

Apr1913 12:35 PM
CraigH

5 
570 
This is a really dumb question but I can't seem to make sense out of this...
For a conservative force, we have...

Apr1913 11:44 AM
WannabeNewton

1 
525 
Hey. If a wire is conducting electricity and all the current is concentrated at the edge of the wire, as in the skin...

Apr1913 11:28 AM
mfb

1 
520 