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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,708 
so imagine a hyperclassical scenario.
A single point elecrron is orbiting a point nucleus. No other charged...

Jun2912 02:07 AM
harrylin

23 
2,769 
Hi all,
So I do feel a bit silly with this question, but I've just begun to realize the relation ship between...

Jun2812 08:02 PM
Muphrid

3 
486 
Hi
Im a bit confused about where to go with this problem  could anyone possibly help please ?
I have to...

Jun2812 06:37 PM
studenthelp10

6 
1,375 
There is a point between earth and moon where the gravitational field strength is zero.
What about the same thing...

Jun2812 04:39 PM
mfb

7 
3,973 
Speed of sound at a specific temperature is independent of Pressure as Pressure varies directly with density.
So...

Jun2812 04:27 PM
Philip Wood

8 
4,190 
I am trying to calculate coulombic potentials. The equation given in wikipedia is
F=k_e\frac{q_{1}q_{2}}{r^2}
...

Jun2812 03:19 PM
nasu

4 
919 
Dear Forum members
I have a question regarding the strattonchu integral to calculate the farfield radiation...

Jun2812 11:59 AM
amir11

0 
450 
Hi,
I have the following problem, I have an electric field (which no charge) which satisfies the usual Laplace...

Jun2812 09:14 AM
hunt_mat

5 
825 
how can we prove this relation F= dv/dx
could some one explain what we mean by the force equal to the change it ...

Jun2812 06:14 AM
sciboudy

3 
1,600 
Hello, next semester I'm taking first year physics. The course covers: Mechanics and waves, dynamics, momentum,...

Jun2812 12:13 AM
saim_

2 
522 
Hi,
I am currently working on a project for university,
The initial idea I had was to use piezoelectric...

Jun2812 12:11 AM
Andrew Mason

1 
825 
I understand that if we apply a force on the axis of rotation of a spinning disc, the torque is in a different...

Jun2712 09:17 PM
rcgldr

7 
1,309 
I have two somewhat related questions.
First, why would we care about the Lagrangian L = T  V (or K  U)? I...

Jun2712 07:26 PM
Cleonis

15 
2,987 
Hello,
Imagine I have 2 magnets and they are repelling each other. Then I add a piece of iron in between them....

Jun2712 05:52 PM
mfb

1 
433 
Hi all.
I would like to do a finite element simulation of a coil in a timevarying magnetic field, to see how much...

Jun2712 03:54 PM
EulersFormula

3 
1,004 
Hi
I wanted to get Pascal's law \Delta p= \rho g ( \Delta h) out of the context of statistical physics by the use...

Jun2712 12:15 PM
Joschua_S

1 
646 
We are all familiar with the description of a wave as being the ripples on a pond with water being the displacement...

Jun2712 10:51 AM
harrylin

77 
9,311 
Two questions. I have read that wind chill is a measurement (or calculation, more accurately) that describes how cold...

Jun2712 01:39 AM
haruspex

1 
501 
Let's say I have a sheet of charge that is composed of a certain amount of charged atoms summing up to Q and a certain...

Jun2612 11:46 PM
Hassan2

1 
488 
Every book I ever read describes a electromagnetic wave as a phenomena generated by charged particles accelerating....

Jun2612 08:36 PM
Caio Ferrari

2 
806 
Dear all,
I have a question about the variable substitution in Langevin equation and FokkerPlanck equation and this...

Jun2612 05:34 PM
Tianwu Zang

1 
791 
Is there a way to calculate the impulse force F if the time of collision is unknown? The only formula I know to...

Jun2612 03:39 PM
HallsofIvy

2 
646 
Hello all,
I need to make a magnetic surface using neodymium disc magnets... the purpose for the surface is to hold...

Jun2612 12:23 PM
mfb

1 
831 
According to various EM texts (Feynman, Griffiths, ...) Gauss’ law holds only in electrostatic situations. But using...

Jun2612 12:01 PM
hercules68

36 
3,701 
Hi,
How do I calculate the amount of energy needed to warm air from 20 °C to 100 °C in a constant volume (1680...

Jun2612 11:57 AM
troymcfont

2 
904 
When considering the case of two or more point masses colliding in a 2 dimensional plane, is there any way to...

Jun2612 09:40 AM
D H

9 
1,168 
I can find the conversion easy enough, but I want to understand the fundamentals behind it. How do we KNOW that 4.184...

Jun2612 09:01 AM
Andrew Mason

2 
547 
This comes from Robert Zurin's the Case for Mars
What is a Terrawatt year? Is that 1 terrawatt produced in one...

Jun2612 03:16 AM
D H

7 
781 
I'm having trouble understanding where the charging time in a capacitor actually comes from. Is it possible to derive...

Jun2512 10:55 PM
jhammin

3 
681 
A particle hits a rod at one of its end in space.
Now will the rod rotate or translate or do both.....What part of...

Jun2512 09:27 PM
amk_dbz

4 
685 
I apologize that this is rather specific, but hopefully enough people have used Goldstein. I have a basic grasp of...

Jun2512 09:11 PM
Bosh

0 
602 
Hi,
I'm going through Goldstein, and I'm a little confused on the distinction between time dependent and time...

Jun2512 08:40 PM
Bosh

0 
711 
hi everyone,
in thermodynamics, when we calculate the heat capacity in constant volume, we assume Cv=dQ/dT..
...

Jun2512 01:54 PM
Studiot

5 
798 
Is it possible to turn 180 degree for a person who is standing on a absolutely frictionless surface? Air friction is...

Jun2512 09:12 AM
A.T.

14 
1,106 
hello guys
if the water surface is at same temp as air above, and humidity is 100%, do any wataer molecules leave...

Jun2512 02:13 AM
haruspex

1 
1,765 
So the attachment has my FBD of a bike.
What I'm trying to understand is how exactly a bike does a wheelie while...

Jun2512 02:06 AM
haruspex

1 
742 
I am wondering, how does lagrangian of such system look like?
http://i45.tinypic.com/24n46zn.jpg
Will it be:
...

Jun2512 02:06 AM
rouge89

3 
829 
Say two girls spin a jump rope, of length ∏ meters, so that the only nodes are where the girls hold the rope, ψ=...

Jun2512 02:00 AM
haruspex

2 
645 
I have a pet idiot, you know the type. "Perpetual motion is the future, we dont understand everything!"
Well we've...

Jun2412 09:11 PM
antonima

29 
2,941 
Do electric fields attenuate in space?
If so what causes the attenuation?

Jun2412 07:28 PM
Apteronotus

5 
1,083 