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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
46,713 
From my limited understanding of Thomson scattering, it only works for wavelengths comparable to the size of the...

Dec812 03:21 AM
andrien

3 
865 
we know, magnetic field is a consequence of velocity attained by a charge..In case of magnet(naturally formed) how do...

Dec812 03:10 AM
andrien

3 
715 
Imagine i have a particle in the xy plane rotating in a circle around the zaxis at a constant angular velocity. The...

Dec712 10:58 PM
Rap

8 
1,030 
Suppose there was a mass, m1, traveling rightwards at v0. There is a second mass, m2, above the line of motion of m1,...

Dec712 05:17 PM
appa609

2 
846 
Please read it , and tell whether it is correct. No explanation also okay. Thanks
Surface tension of water....

Dec712 11:24 AM
Naty1

1 
701 
Hello,
How do I convert phonon density of states into thermodynamic properties?
Specifically, I want specific...

Dec712 09:24 AM
joelio36

0 
666 
U = energy
In the book:
\frac{dU}{dt} = \frac{d}{dt} (\frac{1}{2} mv^2 + \frac{1}{2} kx^2)
then we have m...

Dec712 07:50 AM
mfb

4 
896 
Im thinking of designing a tipping trailer for a car. I need a force of 40KN exerted to tip but would this be too...

Dec712 03:54 AM
CWatters

3 
771 
I was thinking about using a power drill to spin up a gyro.
Let's say this gyro has two segments, a wide center and...

Dec712 03:36 AM
CWatters

8 
1,315 
Hi. Consider the basic eq for a falling body with air resistance
dv/dt=gkv/m
I dont understand air resistance...

Dec612 06:35 PM
K^2

7 
1,138 
I have to thinking about how the skin effect come into play in transmission lines with two conductors and dielectric...

Dec612 05:35 PM
yungman

3 
1,823 
This question might seem strange or dumb.. At least it does in my mind, however I phrase it..
Anyway, I'm wondering...

Dec612 01:16 PM
Fredster1765

11 
864 
Hi,
If I have two sinusoidal waves with the same frequency, wavelength and amplitude, travelling along the same...

Dec612 10:35 AM
AlephZero

1 
831 
We know that
1)a change in current and voltage in a coil may result in induction in other stationary coil..this...

Dec612 07:08 AM
Naty1

9 
868 
Early next year I will be beginning an Electromagnetism unit. However, I think I should refresh my maths over the...

Dec612 04:54 AM
timefortea

2 
638 
Gauss's law can be proved qualitatively by proving that the field inside a charged closed surface is zero. However...

Dec612 04:51 AM
andrien

7 
1,519 
Hi, my friends. Today, I come up with a question suddenly. It is about Sound diffraction.
why can we hear someone's...

Dec512 02:36 PM
davidm1732

7 
912 
Hello, I've just got a quick question about charging an object by conduction. I've been studying for my final and I...

Dec512 12:44 PM
Naty1

2 
810 
Hi,
Ive been doing some reading into 1 dimensional plasma numerical simulations and they keep referring to solving...

Dec512 01:22 AM
Simon Bridge

1 
918 
As the title suggests, how are very high frequency AC produced?
A AC generator must have a limit to the rotation...

Dec412 08:55 PM
amk_dbz

5 
1,095 
Hello to everyone! This is my first post.
I have some basic knowledge in physics back from highschool, but since I...

Dec412 06:59 PM
Khashishi

10 
2,228 
I recently purchased two strings of RGB LED lights, the kind you can set to all sorts of colors by combining red,...

Dec412 06:11 PM
sophiecentaur

16 
1,798 
Hey,
I'm sure you are all familiar with the experiment where you take a glass of water , put a some seal on it and...

Dec412 04:43 PM
Nugatory

1 
573 
I'm working through my professor's solution for this problem, and I don't understand how he comes up with the reaction...

Dec412 01:55 PM
Studiot

5 
2,976 
A metal box will block most EM waves. Is this because the oscillating E field
will be canceled when in contact with...

Dec412 11:30 AM
yungman

3 
745 
My question is kinda simple but it has been causing me some trouble for a while. In the problem of the pendulum...

Dec412 11:17 AM
mfb

1 
698 
Earth shouldn't alone make the value of g=9.81m/sec^2. There is the moon, all the planets and our sun (ignoring the...

Dec412 10:48 AM
D H

24 
2,283 
I have read about effect of refraction due to slowing of light rays reaching the denser medium first and so light...

Dec412 05:39 AM
amk_dbz

11 
1,478 
I am going to build a drum out of a propane tank. I think it will be handy to find the resonant frequency of the tank...

Dec412 05:30 AM
NascentOxygen

3 
1,047 
Hi,
could you please introduce me anythings thats related to optics items function in life?
books,magazins,movies...

Dec412 02:15 AM
Physics7

10 
1,174 
We know that a Magnetic field does no work. Then how does an inductor store energy (1/2 LI2)? When that stored energy...

Dec312 09:22 PM
Khashishi

3 
1,556 
Hello everybody,
First of all I want to thank you all for this great forum.
My question is if a superconductor...

Dec312 07:04 PM
12Element

4 
831 
Hi,
I'm interested in how a dielectric sphere effects a (spatially) uniform time varying field.
I'm sure I'm...

Dec312 10:59 AM
marcusl

4 
847 
Hello All.
In Acoustics, impedance boundary conditions are defined as Robin conditions (sum of normal derivative of...

Dec312 03:06 AM
caltek

0 
726 
Abstract
In this experiment, a beam of light from a laser was reflected off of a rotating mirror to a fixed mirror,...

Dec312 02:53 AM
K^2

3 
1,231 
Hi, I have to write a report on measuring g using a simple pendulum and I wanted to get a bit of the background. I...

Dec212 02:49 PM
toto93

4 
766 
Hi, quick question
I've just started to learn circular motion and i tried a basic force problem.
Imagine there is...

Dec212 02:40 PM
HallsofIvy

3 
808 
The total kinetic energy (as viewed from one inertial frame) of a free, rigid body is the sum of all the infinitesimal...

Dec212 08:25 AM
mfb

2 
636 
Hi, I'm very new here, 10min old, but the problem with my knowledge, or better, lack there of, at this time is very...

Dec212 04:27 AM
juvan

0 
934 
Ok, so I am currently building a cloud chamber for a major presentation in the area of Thermodynamics (or Energy and...

Dec112 04:55 PM
mickyfitz13

9 
1,202 