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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
48,282 
One way to solve the simple LC circuit with 1 inductor and 1 capacitor is to use the Lagrangian formulation of...

Aug3014 07:04 AM
gsal

3 
245 
Hey guys can someone please give me a good explanation on why in an RC circuit the resistor voltage is leading the...

Aug3014 06:51 AM
gsal

5 
196 
Wikipedia claims that the Chandler wobble (a deviation of the angular velocity vector of the Earth with respect to the...

Aug3014 04:32 AM
vanhees71

2 
248 
Dear Experts,
When we launch a satellite, we launch it from earth which is spinning, so the tangential velocity...

Aug3014 03:35 AM
rcgldr

10 
255 
Could anyone please explain or advice me where to read about principles of Schlieren image formation NOT in terms of...

Aug2914 09:19 PM
Steve Drake

1 
177 
Hello Forum,
The numerical aperture NA of a lens is usually a parameter (adimensional) that indicates the lens...

Aug2914 06:20 PM
davenn

1 
161 
So I'm looking at the hessian of the Newtonian potential:
\partial^2\phi / \partial x_i \partial x_j
Using the...

Aug2914 05:15 PM
Chain

2 
166 
I guess we all know laser beams. I wonder if we can make beams in the microwave frequency range and how the beam width...

Aug2914 05:05 AM
davenn

3 
185 
Let's say there is two tubes(cylinders with no tops or bottoms) with charges ##q_1## and ##q_2##, radii ##b_1## and...

Aug2914 04:52 AM
Transstars

3 
225 
Ok small bit of a problem which I have been experiencing.
I am using an industrial size plasma oven by advance...

Aug2814 10:04 PM
Greg Bernhardt

1 
292 
Is a standing wave actually a traveling wave appearing to be still do to interference of two different waves?
If...

Aug2814 03:23 PM
enorbet

15 
392 
I attached a picture with 3 questions?
My first question is, I know that for a convex or concave mirror, If I...

Aug2814 03:03 PM
Drakkith

9 
236 
I need to work out the liters per hour from the diagram I have attached. There are no motors/pumps involved just...

Aug2814 10:59 AM
Nugatory

7 
173 
How can life be compatible with the second law of thermodynamics?
Here is how. Life is a selforganized system. A...

Aug2814 10:57 AM
Shyan

1 
166 
A rope is wrapped around a pole with one end attached to a large object and the other end pulled with a tension T. ...

Aug2814 06:27 AM
DeltaČ

3 
194 
I am programming an addon for a space game/simulation (Kerbal Space Program) and I am looking for some help with a bit...

Aug2814 03:07 AM
A.T.

7 
233 
The only force really considered in classical mechanics is gravity. And yet, we often have problems involving...

Aug2714 11:35 PM
DeltaČ

2 
218 
For the classic Lenz law demonstration using a neo. magnet dropped down a copper pipe, is the magnetic force generated...

Aug2714 04:52 PM
Philip Wood

11 
903 
I came across this article was incredibly interested. I've read the paper and the material was completely over my...

Aug2714 01:55 PM
Drakkith

1 
182 
Hi PhysicsForums,
I was wondering if this youtube was a correct representation of a photon traveling through space...

Aug2714 12:18 PM
jlyu002@ucr.e

6 
282 
Hello,
I am at present analyzing the electromagnetic interaction of a layer of paritcles in air when illuminated...

Aug2714 10:53 AM
Karthiksrao

0 
146 
Many of you are familiar with the catapult launched profile fuselage gliders that are sold in hobby stores. Since...

Aug2714 06:04 AM
A.T.

16 
1,093 
In almost every textbook I have seen, pressure is said to be one of the most important state variables of a...

Aug2614 06:11 PM
Chestermiller

9 
234 
Hi Guys! I have a, rather general, question regarding the nature of magnet repulsion.
When two opposite poled...

Aug2614 05:29 PM
Bobshark

2 
149 
According to d'Alembert's Principle, the virtual work done by constraint forces must be zero.
I have a few things...

Aug2614 04:26 PM
Greg Bernhardt

1 
276 
Hello everyone, I was recently creating two different types of plasma for a Science Fair, one created from ionised...

Aug2614 10:37 AM
Simon Bridge

7 
278 
Hi all, I'm new to the forums (in posting at least!). I recently graduated with a B.S. in Applied Physics, and have...

Aug2614 08:49 AM
Andy Resnick

9 
348 
Hello PF'ers,
Why is it that two lightbulbs produce twice as much brightness as a single lightbulb would? If we...

Aug2614 08:24 AM
ViolentCorpse

4 
227 
I want to construct 5 sided dice in the shape of a squarebased pyramid.
When rolled, I want the die to have equal...

Aug2514 09:09 PM
Haborix

12 
405 
hi,
I'm a student and i have an electromagnet and a bar magnet paced head on coaxially and i want to calculate the...

Aug2514 07:16 PM
Meir Achuz

32 
893 
I cannot seem to visualize how this compression and rarefaction occurs for example when I clap my hands, I know I move...

Aug2514 07:09 PM
hongiddong

4 
233 
Hey!
I need to calculate the electric field on the axis of a circular plate of radius a with the following charge...

Aug2514 03:24 PM
loops496

2 
162 
Hello,
I am having trouble understanding collision frequency in following discussion from Kubo,...

Aug2514 08:46 AM
AirTycoon

2 
142 
Hello,
I am a PhD student in chemistry, and need to determine the pressure of a reaction to be carried out
I...

Aug2414 11:32 PM
Chestermiller

5 
244 
I am having trouble wrapping my head around the idea of a piston/cylinder type arrangement where the piston has a...

Aug2414 05:54 PM
ullrtech

7 
289 
I know that delta h(Enthalpy) is heat and it is also the total kinetic energy of the system.
Temperature is the...

Aug2414 02:13 PM
Andrew Mason

11 
438 
While deriving lagrangian equation using D'Alembert's principle, in Goldstien, they defined a variable called "virtual...

Aug2414 10:08 AM
USeptim

1 
229 
My question relates to entropy generation in a closed system
ΔS=dQrev/T for a reversible process
ΔS=dQ/T + Sgen for...

Aug2414 09:54 AM
Chestermiller

12 
280 
Just read in Taylor that in general the kinetic energy can depend on position as well as velocity. I believe him, but...

Aug2414 09:47 AM
USeptim

9 
339 
How magnetic field associate with mass........
from the experiment we know that this is due to electric charge........

Aug2414 06:39 AM
ChrisVer

3 
268 