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Before posting anything, please review the Physics Forums Global Guidelines. Again, for some odd reason, people...
Apr22-11 05:26 AM
ZapperZ
1 41,686
A plane is inclined at an angle A to the horizontal. A particle is projected up the plane with a velocity u at an...
Feb17-11 09:58 AM
hologramANDY
1 2,255
Does anyone know figures for Diffusivity (diffusion coefficients) for two gases at different temperatures. Such as...
Feb9-11 01:35 PM
capanni
1 2,836
Hi all. I hope to have a better understanding of the consequence of introducing high heat on water in a hot water...
Jan25-11 07:06 AM
810F250
1 1,743
a barmagnet seems to be a densly winded solenoid just with the exception that the field of the solenoid is allmost...
Jan25-11 11:28 AM
timthereaper
1 1,427
Hello I am trying to understand some fluid mechanics I have two parallel infinite plates with fluid between the...
Jan24-11 03:27 PM
Andy Resnick
1 2,236
Given two bodies where GM/x^2=A and Gm/x^2=a, how might one model the acceleration of either bodies as a function of...
Jan25-11 12:03 PM
timthereaper
1 626
I would be grateful for your help with a small project I am involved in at work. I would like to set up an excel...
Jan26-11 06:29 AM
lalbatros
1 1,307
The problem I am having is that I cannot seem to find the magneto-motive force of a permanent magnet. Most material...
Jan27-11 09:24 AM
WarpedWatch
1 1,665
Hello, I have just completed a physics lab in which I was trying to prove that the potential difference across a...
Jan27-11 01:56 PM
Doc Al
1 1,279
Oops
Jan28-11 01:55 AM
study.bug
1 684
Very few textbooks cover gaussian integrals effectively. This isn't a big deal as they are easy to locate in integral...
Jan29-11 01:50 PM
Meir Achuz
1 1,192
hey guys! we know that velocity of a wave = wavelength x frequency. and speed of light changes with change in optical...
Jan28-11 02:38 PM
Andy Resnick
1 1,572
Can somebody explain to me the differences between the ensembles, and how does this differences refer to experiment? ...
Jan29-11 03:58 PM
paweld
1 8,858
I am hoping someone here has experience with permanent magnets. I have a theory on how to size a permanent magnet for...
Jan30-11 08:59 PM
Phrak
1 2,744
I've always noticed something strange about new york city subways. When they start to slow down, you feel a force...
Feb1-11 05:23 AM
russ_watters
1 702
We know that with motion of charge m.field is produce but what will happen to its E.field during motion. Is it will...
Feb1-11 10:27 AM
jtbell
1 656
Consider having a hollow silicone tube of 7 mm diameter and a wall thickness of 1.5 mm. There are two copper foil...
Feb1-11 10:21 AM
nasu
1 438
Consider an positive electric field and a positive charge, q inside this field. Suppose the FIELD does work on this...
Feb2-11 08:47 AM
MaxwellsDemon
1 2,450
I don't seem to grasp the meaning of boundary conditions for Laplace's equation. Consider the Lagendre expansion of...
Feb4-11 04:27 AM
IFNT
1 1,113
Why do non Newtonian fluids such as the cornstarch and water mixture respond to stress the way they do? What prompts...
Feb4-11 07:01 AM
Spinnor
1 905
Firstly, let me excuse myself for not knowing the most appropriate location to post this question. This is a question...
Feb4-11 01:59 AM
Sane
1 967
Can anyone give suggest me a science project which is award winning,easy & cheap.
Feb4-11 11:48 AM
schip666!
1 948
Let's say I have a point dipole (as an approximation for an atom) at the origin and it oscillates in the z axis. The...
Feb4-11 04:23 PM
G01
1 3,321
Suppose I have a wire with a net charge (lets say negative) in a uniform electric field from another source, such that...
Feb4-11 06:22 PM
ednobj
1 1,294
While researching for a problem that I wanted to solve i came upon the fact that there is no way to truly calculate...
Feb5-11 06:32 AM
nhmllr
1 2,429
A plank of mass m1 with a bar of mass m2 placed on it lies on a smooth horizontal plane. A horizontal force growing...
Feb5-11 12:07 PM
dharavsolanki
1 705
EDIT: I just realized I have to use the tension as the force and not simply mg. It's been a while since I dealt with...
Feb5-11 07:57 PM
rcgldr
1 3,798
Let's say you have two pulses from the same source, one whose phase is slightly delayed relative to the other one....
Feb7-11 06:59 PM
Manchot
1 1,049
Imagine for a moment a steel core with no air gap, that is driven to saturation by a powerful permanent magnet....
Feb6-11 02:31 PM
pallidin
1 1,307
Can anyone please explain the concepts of scalar and vector potential and how they can be used to derive the wave...
Feb8-11 05:07 PM
failexam
1 593
What exactly does "fixed volume" mean in thermodynamics, for a liquid? Does it mean that the container volume is...
Feb9-11 11:33 AM
Studiot
1 3,862
Hi, I am trying to calculate the amount of heat required to raise the temperature of a rubber sphere by 20...
Feb10-11 09:39 AM
thepok
1 832
Can "smoke" ring be blown with only air (withouth smoke) in cold?
Feb12-11 11:08 AM
klimatos
1 958
This is more of a concept that I am confused on. IF there are 2 metals, one on top of the other, and they are...
Feb10-11 05:40 PM
audilover
1 1,189
when light is reflected on a surface, there is always going to be some absorbsion by the reflective material. what i'm...
Feb11-11 06:50 PM
Drakkith
1 901
We have 1.400.000.000 km│ water which would become 2.24E12 km│ of water vapour. Does anyone know how much the earth...
Feb13-11 04:08 PM
klimatos
1 629
In a double slit, when the distance between the screen is NOT small (i.e. the rays r1 and r2 are not parallel) how is...
Feb14-11 01:06 AM
RedX
1 994
So I have a spring problem where I have two masses and three springs hanging down from a ceiling. Each spring has a...
Feb15-11 09:52 AM
AlephZero
1 1,470
Hi, I need expand a spherical function(real function not a complex function) in terms of spherical harmonics....
Feb15-11 07:34 AM
DrDu
1 1,732
Of course, the second law of thermodynamics implies that all closed systems will go from a state of state of order to...
Feb16-11 02:48 AM
Filip Larsen
1 2,288

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