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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
47,884 
I'm reading through Feynman's lectures, and just read his demonstration that:
a) a sphere generates the same gravity...

Jan1810 12:40 AM
dhans

9 
8,956 
I am trying to lift a load with a drill motor. I have a chain drive with a 3.7x1 ratio  13 teeth on the drive gear...

Jan1410 09:13 PM
volie1

10 
3,852 
Hello everyone, I am trying to understand COMSOL 3.5 and I am interested in Photonic crystal fibres and tapered...

Jan1510 01:34 PM
multiphysics

3 
4,218 
So, we learned about electricity in Physics a few months ago. One thing from the unit is still bugging me that I...

Jan1410 10:19 AM
SMc21

8 
5,360 
Does anyone know of any inelastic impact / collision equations or theories that somehow incorporate a spring constant...

Jan1410 02:37 PM
alext918

2 
1,021 
As I explained before, I'm struggling with physical basics of vibration in rods as a nonphysicist.
If someone...

Jan1510 07:28 AM
yerpo

1 
991 
Hello. I'm new to the forum and I hope this is the correct place for this question. Would it be possible to lift a...

Jan1810 08:58 PM
Bob S

6 
1,487 
I beg you to understand my poor Eng..
If there is any poor grammar or spelling..plz correct me..
While studying...

Jan1410 04:00 PM
Bob S

4 
1,388 
This is most likely a complete failure of comprehension on my part (as ussual), but Ive been thinking about this for...

Jan1610 03:06 PM
Prologue

14 
1,910 
Is it possible to calculate thermal conductivity of a material given just the deltaT at steady state and the material...

Jan1510 12:30 PM
rdt24

9 
11,861 
we all know that T = F x r
where r is prependicular distance from axis of rotation.
Greater the distance greater...

Jan1610 08:31 AM
Lsos

12 
1,405 
How can you prove that the electric field is conservative? I've learnt about stuff like line integrals but I'm not...

Jan1410 11:09 AM
GRDixon

3 
2,902 
I am trying to create a model of a motorcycle suspension to figure how road bump forces get transfered to the bike.
I...

Jan1710 10:51 PM
baranij

3 
6,066 
I have been involved in a discussion concerning the behavior of a bullet during flight. It seems there are long...

Jan1510 06:23 AM
DRice.72

5 
3,579 
It is a wellknown fact that Maxwell's Equations, along with Lorentz's Force Law, form a complete description of...

Jan1410 11:47 AM
Andy Resnick

8 
2,484 
Hi All,
Please take a very long tightly wound solenoid of any radius with another coil wound around the outside of...

Jan1510 08:12 PM
Phrak

8 
1,040 
I've got a problem understanding a line of proof in my lecture notes.
Given that you have a charge of +Q and mass m...

Jan1410 06:59 AM
ian2012

4 
1,402 
personally, I think glass would affect the measurement, as It should have Raman scattering.
please help me to...

Jan1410 08:54 AM
lionelwang

0 
908 
What sort of field do you need to confine electric charges?
Is an electric field alone possible?
Do the charges have...

Jan1710 09:51 AM
GRDixon

18 
2,681 
According to Sir Newton, F = ma
i.e if a body needs to be accelerated it requires some force basically.
or in...

Jan1410 02:50 PM
R Power

7 
1,224 
would any one deeply tell me what is kinetic energy.

Jan1710 02:11 PM
Cryxic

4 
1,046 
*sorry, wrong forum section*

Jan1810 01:00 PM
Gordy

0 
1,497 
I assume that if one has several current loops that the magnetic fields that they generate just add together...

Jan1410 09:50 PM
Matterwave

4 
617 
Is there any physical meaning to the cross product of two magnetic fields e.g. two fields generated in two different...

Jan1610 07:10 AM
wofsy

7 
969 
We have consistently been told that light propagates through a vaccuum. My question is twofold:
What is this...

Jan1610 12:26 AM
Pierre007080

27 
1,731 
Hi,
I have a small DC dynamo (with no spec sheet) which i digitally sample to find it's voltage at any given time. I...

Jan1610 12:56 AM
El_Guapo

2 
4,239 
Can someone provide a qualitative description of how electromagnetic fields behave differently when one uses the Proca...

Jan1710 10:02 AM
Count Iblis

4 
969 
Hi guys,
I have a question. I have lived life in the apparent belief that if a car is moving at a fast enough...

Jan1710 11:06 PM
Prologue

6 
6,820 
Consider a cold cool drink bottle taken from freezer and exposed to atmosphere....as everyone knows, water would form...

Jan1810 08:33 AM
Stonebridge

14 
1,716 
In the book "Fundamentals of Photonics", the form of the Gaussian beam is written as
I(\rho,z) = I_0...

Jan1810 01:16 PM
Bob S

3 
1,183 
Say I want to parametrize the plane. I can use cartesian (x,y) or polar (r,theta). But I cannot use x and r, because...

Jan1710 10:47 AM
daudaudaudau

0 
607 
I've got a couple of question about Maxwell's Equation and its relation to Special Relativity.
1. Why do we think...

Jan1710 04:19 PM
clem

1 
3,337 
The most general way of calculating the value of the vector electric field at a certain point P is given by the...

Jan2010 05:20 AM
jambaugh

22 
6,040 
I’m an entrepreneur in South Africa with the rights to a type of insulating coating. It’s new on the market here and...

Jan1810 03:44 AM
physicsidiott

0 
6,544 
Hi there,
I've just built a crane (well, actually a jib arm), to be used on a film dolly with
a camera on one end...

Jan1810 07:50 AM
silvtal

0 
1,020 
The electric filed at a distance x from the center of a uniformly charged disc of radius R,along the axis passing...

Jan1910 02:25 PM
elect_eng

10 
5,027 
I am confused about surface tension.
Everywhere it is written that due to unbalance of forces at surface the...

Jan1910 01:03 PM
Mapes

5 
1,775 
So, i am considering to do experiment on water and magnet for my research paper. So what i am planning to do is, i...

Jan2010 05:38 AM
cibui

5 
1,467 
Suppose you have an two objects A and B having different potentials \phi_A, \phi_B and voltage V=\phi_A \phi_B.
...

Jan2010 12:23 AM
vin300

6 
2,734 
Hi. I have got two questions...
1. How can we determine the pressure at the boundary of two gas phases (say,...

Jan2010 01:00 AM
eemmann

0 
750 