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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,796 
Consider a woman standing on a turntable, which can turn without any friction. Both are initially at REST. A woman (m...

Nov707 06:35 AM
TVP45

18 
3,974 
Hi.
I was wondering how strong an electromagnet would have to be to move water, such as a low stream from a tap or...

Nov707 02:46 AM
Paulanddiw

5 
1,416 
There's a simple explanation that wasn't covered in the last thread about this.
Start off with an ideal...

Nov607 11:49 PM
ael65

3 
9,682 
Now I am learning Uniform Circular motion, but I don't know what do horizontal circle and vertical circle mean? I...

Nov607 10:19 AM
Doc Al

6 
1,989 
A changing magnetic field induces a circulating current in a wire loop.
My question is: Does the changing magnetic...

Nov607 09:50 AM
marcusl

1 
1,110 
My understanding of 'camber thrust' is that when a wheel rolls with it's axle not parallel to the ground, it will act...

Nov507 05:40 PM
rcgldr

16 
3,925 
Hello, I would like to know if Pascal really made the experiment of the barrel.
I have looked for in his...

Nov507 10:38 AM
hamilton333

2 
2,673 
I was going through the method of image charges and came up with this "infinite grounded conducting plane". What i...

Nov507 09:31 AM
harshant

5 
2,470 
for example, a book is at rest on a table.
One might say that the normal force is the reaction force.
BUt...

Nov507 08:02 AM
Doc Al

17 
6,677 
Aiight, so I pose this question: does the length of a cannon change the distance the projectile is able to go? ...

Nov407 11:23 PM
wysard

5 
2,457 
Hi, My question is regarding to the effect of magnetic field on gas particles.As you all know, according to the...

Nov407 12:52 PM
DaleSpam

2 
3,904 
According to the popular interpretation of 'Bernoulli's Principle', moving air should always be associated with a...

Nov407 08:28 AM
russ_watters

69 
20,130 
The partition function in the classical theory is an integral over phase space. Thus, the partition function is often...

Nov307 09:04 PM
Euclid

2 
3,085 
Suppose that we will proof the continuity of the first maxwell equation:
So we have div(\vec{E})=\frac{1}{\epsilon...

Nov307 09:46 AM
Bert

2 
2,302 
Does anybody know a good topic for a classical mechanics term project. I just don't have any ideas. It can just be a...

Nov207 04:01 PM
blechman

2 
2,582 
Ok so we are studying Faradays law right now and am a little confused. I will try and state my understanding of it,...

Nov207 10:18 AM
wysard

5 
2,479 
um, first of all, why was my post locked? all i wanted was to know how to patent my idea.if adding this post is in...

Nov207 10:14 AM
ZapperZ

3 
2,376 
Okay, Im doing grade 12 physics in australia and I was wondering about systems of planets interacting with each others...

Nov207 07:50 AM
Hamish Cruickshank

5 
2,811 
Hi, I'm new here and was wondering if anyone could tell me what exactly happens at the gravitational midway point...

Nov107 10:58 PM
wysard

7 
2,079 
what kind of sources of light generate sinusodially varying electric field that is solutions of the form
...

Nov107 06:50 PM
Claude Bile

7 
2,569 
Im having trouble calculating the capacitance of a nonparallel plate capacitor where seperation at one edge is da...

Nov107 10:20 AM
clem

1 
5,404 
When talking about a transmitted plane wave incident on a plane, ie.
\underline{E} = E_0 \^i...

Oct3107 11:24 PM
Claude Bile

3 
2,193 
What I'm about to ask isn't a homework question, but it is a personal question relating to a homeproject I'm working...

Oct3107 09:22 PM
FredGarvin

2 
11,713 
We're learning about a systems center of mass and have:
F_{net} = Ma_{com}
But I having a problem understanding...

Oct3107 08:59 PM
pmb_phy

6 
1,833 
i am having some trouble understanding the concepts of center of mass for example using the equation...

Oct3107 06:03 PM
pmb_phy

4 
2,037 
# Hi
# My instructor of EM course wrote two formulas on the blackboard and asked whether they are correct and what...

Oct3007 09:09 PM
blechman

8 
1,906 
Hello all,
I officiate high school and college basketball. One of our rules concerning a dribble states...

Oct3007 02:09 PM
berkeman

3 
1,073 
I'm working on a project for school and I have to come up with a system where a pulled object moves twice as far as...

Oct3007 11:26 AM
Lex1138

3 
1,915 
Does anyone know when Coulomb discovered his law? And does anyone know when the concept of electric field lines was...

Oct2907 08:36 PM
pmb_phy

1 
1,565 
what do we mean when we sy the speed of spherical waves is v

Oct2907 06:43 PM
rbj

10 
1,981 
Hi...
I have hopefuly simple question, which however drives me crazy...
I know how to mathematically derive that...

Oct2907 06:31 PM
rbj

1 
4,193 
when we derive the wave equation for a an o0ne dimensional wave moving at constant speed we assume that the wave move...

Oct2807 09:06 PM
Claude Bile

2 
1,730 
Hello to all,
I'm reading one article about LT (low temperature) GaAs MSM (metalsemiconductormetal) photo switches...

Oct2807 08:39 PM
Claude Bile

2 
1,006 
I just started Classical Electrodynamics and stumbled upon a problem:
An electric field has this form:
E_{x}=ax...

Oct2807 01:22 PM
Meir Achuz

1 
1,346 
Hey gang,
I am doing a Mastering physics question, and it's got me stumped. ><
Q: You need a capacitance of 50.0...

Oct2707 01:01 PM
ranger

1 
2,146 
what is the use of representing wavefunctions say \psi(x,t)=A\cos(kx\omega t) by \psi(x,t)=Ae^{i(kx\omega t)} when...

Oct2707 11:32 AM
OOO

7 
2,151 
Hello, I have merely been brainwashed by the formulas and math of AP Physics. Now, I want to actually understand what...

Oct2607 12:53 PM
TVP45

52 
16,264 
Let's say you have an object on the ground. Why do they say that friction is proportional to the normal force instead...

Oct2607 04:58 AM
nolanp2

11 
2,655 
So, with the mechanical index of refraction
n = \sqrt{ 1  V/E }
we plug into the optical ray equation, ( s =...

Oct2607 02:07 AM
Helios

1 
1,647 
I know that the drag force is proportional to the velocity to some power, n, and that n increases with velocity and...

Oct2507 07:46 PM
TMM

3 
1,935 