
Before posting anything, please review the Physics Forums Global Guidelines.
Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
46,790 
How does dissvoled gas bubbles move in solution?
I want to do a computer simulation on nucleation so i am trying to...

Jul2108 11:03 AM
Vanadium 50

1 
1,085 
What is charge?

Jul2008 05:31 AM
CompuChip

1 
898 
First, to preface this, I have never taken any formal engineering courses, and I don't remember the physics class I...

Jul2008 12:05 AM
rcgldr

4 
3,971 
Can someone explain me how to extend Hamilton's principle to nonholonomic system's thru the lagrange undetermined...

Jul1908 02:10 PM
gdp

1 
2,543 
Where can I find online a good set of rigid body dynamics exercises? Thanks.

Jul1908 06:05 AM
Bert

2 
1,251 
Hi, folks.
I am looking for some help to understand the physics of a water pendulum (in fact, I don’t even know if...

Jul1808 09:39 PM
luke

1 
2,379 
I am trying to calculate the Efield from a varying Bfield. The Bfield is from a current loop.
...

Jul1808 09:03 PM
luke

4 
3,702 
Has anyone heard of anyone trying to conduct the double slit experiment with a barrier between the two slits that goes...

Jul1808 06:41 PM
pallidin

3 
1,156 
Can anyone please tell me whether the temperature measured from Wien's Displacement law/Planck's Radiation...

Jul1808 02:55 PM
Andy Resnick

10 
1,794 
I don't know if you guys have heard that, when a railroad car is about to start moving, railroad operators sometimes...

Jul1808 11:54 AM
berkeman

4 
3,722 
hi, I'm a web developer so i usually stay in front of a computer for almost 12 hrs a day.
my question is, when i...

Jul1708 10:06 PM
DaveC426913

1 
1,139 
I'm trying to figure out what the stress level of a wakeboard is when it hits the water upon landing. I'd like to be...

Jul1708 04:46 PM
ugly

0 
2,782 
Could someone show me the simple formula, showing how quickly
an item sinks in water.
Presumably the formula...

Jul1708 11:59 AM
bemortu

4 
3,075 
I have a conceptual question regarding the selfinduced emf in a solenoid coil. I have attached a graphic from...

Jul1608 09:44 PM
Defennder

6 
1,910 
Hi,
I am going through a book on thermal physics (specifically on a section on the 2nd Law)
It talks about...

Jul1608 08:45 PM
juanedilio

2 
2,131 
Dear all
I am a secondary and sixth form teacher in London and I have come across a
puzzling situation involving a...

Jul1608 04:18 AM
mklein

2 
1,119 
Here is the situation. A large electric motor has a long rod attached at a 90º to the motor shaft and is accelerated...

Jul1608 12:46 AM
russ_watters

3 
1,327 
If say a cylindrical piece of material with a high yield strength is compressed in a vice with a force approaching the...

Jul1508 10:17 PM
stewartcs

2 
1,383 
I was playing around with some manipulations of maxwell's equations and seeing if I could work out the wave equation...

Jul1508 05:00 PM
Andy Resnick

3 
954 
Hi. I'll start off by saying I have a background in mathematics, but not in physics. If I use the wrong term, I...

Jul1508 02:17 PM
rcgldr

5 
1,150 
Hey everyone. First post here. Sorry if this is the wrong place. Force calculation seems to fall under classic...

Jul1408 11:33 PM
lukahn12

2 
1,150 
Are there any other math/physics/engineering runners out there who are interested in collaborating on an effort to...

Jul1408 06:19 PM
juliasantanna

1 
4,485 
Hello! I'm very new to these forums so please pardon my ignorance.
When you twirl a mass on a string horizontally...

Jul1408 05:56 PM
Doc Al

6 
2,444 
Why do we apply law of conservation of linear momentum on a body that explodes in air when an external force,...

Jul1408 08:35 AM
pardesi

8 
2,462 
Hi all,
Some time ago I watched this video about an intraterrestrial elevator. It is about a theoretical elevator...

Jul1408 06:06 AM
Gear300

4 
1,376 
Hmm how does one prove that a lagrangian is a function of just the generalized coordinates and the generalized speed...

Jul1408 03:19 AM
pardesi

2 
1,157 
BACKGROUND:
I am doing an experiment determining the young's modulus of a cantilever through principles of SHM (i.e....

Jul1308 07:05 AM
tinytim

4 
4,057 
1975 the roof of the Montreal Velódromo which weighed 3.7x107N was raised 10cm to be centralized. What the work...

Jul1208 10:10 PM
kateman

1 
1,413 
There is a EM radiation of frequency suppose x Hz.Let it has to travel a distance of y m.Now what's the time required...

Jul1208 06:10 PM
Andy Resnick

3 
1,324 
Hi.
I'm having some problem solving this problem: Consider a 3 body elastic collision; 3 bodies on 1 axe; both have...

Jul1208 06:16 AM
BobMonahon

1 
3,262 
Can anyone give a simple explanation to generalised cordinates in Lagarangian/hamiltonian mechanics

Jul1108 03:02 PM
Oberst Villa

2 
1,221 
For an ideal gas PV=nRT where n is the number of moles show that the heat transferred can be written as:
dQ =...

Jul1108 10:43 AM
Andrew Mason

1 
1,391 
Lets assume we have a resistor material, with a perfect solid spherical shape and no defect, we connect it from south...

Jul1108 08:44 AM
cabraham

4 
7,908 
I've been searching through the internet and some of my optics books, but nowhere was I able to find the derivation of...

Jul1108 03:49 AM
r4nd0m

10 
4,043 
In multipole, the electric quadrupople interaction with incident electric field:
...

Jul1008 11:29 PM
BiBByLin

0 
1,609 
the link below should take you to a google book called "principles of nanooptics" by novotny and hecht. my question...

Jul1008 10:38 PM
BiBByLin

2 
1,497 
OK. I have been fighting with my pen and paper for hours trying to fathom this:
I have been thinking about that...

Jul1008 09:18 PM
rcgldr

13 
2,394 
does the electromagnetic spectrum limited?
whate is the theorical answers for limitation of the spectrum?

Jul1008 07:23 PM
lightingbolt1

3 
1,187 
A friend asked me this question:
There is a capacitor with capacitance C, charge Q on either plate and an electric...

Jul908 04:43 PM
DrZoidberg

15 
2,045 
I have never understood how images are reflected in mirrors, even now that I am going into my fourth year of...

Jul908 04:02 PM
madness

13 
2,326 