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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,791 
Does a body rotating about an axis also rotate about any other axis?
Eg. Cars on a racetrack may be rotating about a...

Feb1014 12:31 PM
D H

8 
287 
Edit: Figured it out!
∑ A_lR^lP_l(cos\theta) = E_0Rcos\theta + ∑ \frac{B_l}{R^{l+1}}P_l(cos\theta)
Goes...

Feb1014 10:14 AM
tolove

0 
186 
This is NOT a HW question. I'd appreciate an explanation of the following:
I would like to determine the forces...

Feb1014 09:22 AM
olivermsun

7 
214 
I have been looking at the problem of 2 point masses connected by a spring in polar coordinates. The problem is solved...

Feb1014 05:13 AM
voko

9 
265 
Hi All,
I'm designing a heater for some cylindrical tubes. In my original design, I simply had a flat plate...

Feb1014 02:26 AM
CWatters

1 
165 
Hello Physics enthusiasts
Imagine an infinitesimal small current loop where the current can run clockwise or...

Feb1014 12:58 AM
Meir Achuz

10 
272 
My question is about the centripetal acceleration formula a = ω^2*r. If we keep the angular speed constant then why...

Feb914 09:22 PM
AlephZero

2 
252 
Hello all,
I have a question regarding the deformation of an object. Imagine that I have a cylinder which I apply a...

Feb914 08:25 PM
cowrebellion

0 
170 
When you shine light on a mirror perpendicularly. Does the reflected beam then not interfere with the incoming one?...

Feb914 04:39 PM
sophiecentaur

2 
152 
Hi all,
After reading Feynman's Lectures I see that his way to understand energy is as a conserved quantity. On the...

Feb914 04:33 PM
sophiecentaur

12 
341 
Hello everyone,
Consider a weight tied to a string spinning in a horizontal circle.
According to Newton's third...

Feb914 04:26 PM
sophiecentaur

3 
201 
If I have a hot wire, the distribution of its temperature with respect to radius (from the center of the wire) and...

Feb914 02:08 PM
Chestermiller

1 
173 
I have been wondering about this for a while! What exactly is GRAVITY? How does it work?? How are things pulled...

Feb914 10:56 AM
DaleSpam

11 
432 
Hi all,
I have a question about the "missing cone" problem in widefield microscopy. The Fourier equivalent of the...

Feb914 02:51 AM
DrDu

6 
228 
Hi,
I,ve been looking through some notes on Lagrangian mechanics but they have got me confused so i'll start from...

Feb814 08:24 PM
Sunfire

5 
241 
Can we focus parallel sound waves using convex and concave lenses since they essentially follow the same laws of...

Feb814 05:35 PM
Drakkith

11 
272 
I searched for the images of refraction on google images and i saw an image where a laser light was incident on a...

Feb814 09:31 AM
sophiecentaur

6 
261 
I was given the (general) following form for the Hamilton and Heisenberg Equations of motion
\dot{A} = (A, H)_{},...

Feb814 12:03 AM
Ang Han Wei

0 
192 
If g (acceleration due to gravity) was double on Earth, how tall would our atmosphere be?

Feb714 09:43 PM
olivermsun

3 
220 
Hi everyone!
I've been thinking about a certain problem for a while now. And that is a Lagrangian formulation of...

Feb714 07:59 PM
BruceW

10 
422 
Hi all,
Well, I'll try to explain my doubt with an example. The idea of force formalizes what we intuitively think...

Feb714 04:43 PM
voko

10 
375 
I appologize for any spelling or grammar errors. Please take into account that English isn't my first language and...

Feb714 12:50 PM
MonkeyKid

4 
242 
There is a spherical capacitor with inner and outer radii of a and b respectively,has a dielectric material of small...

Feb714 09:31 AM
Shyan

0 
197 
For a thermodynamic system there exists a function called entropy S(U,N,V) etc.
We then define for instance...

Feb714 03:55 AM
Useful nucleus

2 
235 
I know there are other things that fail about the rutherford atom
but as the electron is accelerating and radiating...

Feb614 11:47 PM
Khashishi

3 
239 
I have an object at rest which accelerates at a variable rate before coming to rest again. At any given point I can...

Feb614 09:50 PM
rcgldr

21 
460 
Please could somebody explain how the coefficient of static friction can be quoted as a constant in tables etc? ...

Feb614 09:02 AM
A.T.

1 
175 
Hi all,
If I place an object far away from a converging mirror or lens and start to move it closer, I note that I get...

Feb614 01:55 AM
Drakkith

1 
230 
Hi, I am currently in High School physics and we are going over Energy and Momentum. I have some questions about how...

Feb514 09:27 PM
quantumz

2 
277 
B = μ0nI
Usually, the value of B is quite small...
I'd like to boost the magnetic field B to a much larger and...

Feb514 09:02 PM
DashIQ

3 
211 
First Post!
So I was curious about how I could relate my new found knowledge of electromagnetic inductance on...

Feb514 05:02 PM
Philip Wood

6 
1,458 
There is several things I am confused about with gravitational potential energy. So, first of all, shouldn't U=mgh...

Feb514 04:05 PM
MrBillyShears

5 
258 
I'm not asking about the specific questions contained in the attached document  I know all the answers. I'm wondering...

Feb514 12:10 PM
phyzguy

1 
252 
Hi, I'm trying to figure out what phase differences take place with an ideal transformer. This is what I have figured...

Feb514 11:56 AM
Philip Wood

2 
255 
Apologies if this has been discussed in other threads already. I did a quick search on 'chain fountain' and got no...

Feb514 11:08 AM
JollyOlly

49 
1,189 
I have a disagreement with a Quantum mechanical scientist about a double slit experiment with polarizers, which gives...

Feb514 08:21 AM
DParlevliet

8 
245 
Consider a conducting loop with resistance R and area A suspended by a nonconducting wire in a magnetic field ...

Feb514 05:08 AM
Shyan

8 
249 
Isothermal Titration Calorimetry measures the enthalpy of (e.g.) protein binding by measuring the amount of heat that...

Feb414 11:28 PM
Andrew Mason

1 
215 
Hi,
For finding absorption crosssection, why is it necessary that that the quantum yield of the fluorescence be...

Feb414 06:28 PM
naumansm

0 
152 
Hi all
I am looking for the intensity of the fringes on the screen behind two slits with a given width.
I thought...

Feb414 04:40 PM
sophiecentaur

3 
176 