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

Apr2211 05:26 AM
ZapperZ

1 
48,194 
Just a quick question about mousetrap cars....
Does anyone have suggestions about possible materials for mousetrap...

Dec2909 09:41 AM
fhorn_rocker

8 
15,383 
I'm trying to understand Central Force problems and Scattering (from a central force) but the website of my course...

Dec3109 07:19 AM
Astronuc

1 
904 
I'm trying to solve a problem that came to me using a numerical method.
I'm gonna put it here.
Using the moment...

Dec2909 08:58 AM
Born2bwire

16 
1,914 
Hi everyone,
Please refer to the attached diagram.
I was playing around with pulling tablecloths out from the...

Dec2909 01:30 PM
Doc Al

3 
2,765 
So i am going to be dropping a magnet through a coil that is a submerged in a liquid. Say that this liquid is 100%...

Dec3109 11:12 AM
K_F_Gauss

6 
976 
Hi guys,
I have a question : why do some equations in Physics have a square sign. For example in the Centripetal ...

Dec2809 07:59 PM
sweet springs

2 
810 
So if you have a typical basketball "mens".
http://en.wikipedia.org/wiki/Basketball_(ball)
so, my friends and I...

Dec2809 06:25 PM
sweet springs

9 
3,075 
Take a capacitor arrangement...the capacitor having 2 plates which are square shaped. Assuming one of the plates as A...

Dec3009 12:29 AM
Born2bwire

32 
5,028 
Hello everyone,
I am currently working on a project where I am trying to find power by being able to measure the...

Dec2809 01:32 PM
SystemTheory

8 
4,598 
I have data for the radiation pattern of antenna, given as the theta and phi components of the electric field...

Dec2909 10:43 AM
marcusl

8 
5,354 
In trying to understand the underlying mechanics of irreversible processes, I came up with four mechanical asymmetries...

Dec2809 01:38 PM
rs54

0 
632 
How much energy (Watts?) would be created by a balloon that was released under water? I am picturing a scuba diver's...

Dec3009 07:58 PM
vertices

5 
3,246 
Can someone explain the role of eddy currents that produce levitation such as in the floating tube expt or the jumping...

Dec2809 10:12 PM
chanderjeet

0 
828 
After having completed 2 years of a Bachelor's degree, the only definition of entropy I know is \Delta S = \int_1^2...

Dec2909 12:19 PM
fluidistic

3 
822 
I have built a model of rotating blades of a helicopter and want to mathematically calculate it's moment of inertia. I...

Jan210 03:53 PM
eptheta

6 
6,107 
temperature is the measure of average kinetic energy of the molecules of a gas , also temperature is the measure of...

Dec2909 04:44 PM
Andrew Mason

2 
1,106 
I would need to know what is the state of the art about the study of the radiation emitted by an accelerated charge....

Dec3109 10:42 AM
Rajini

7 
2,360 
Is there a way to calulate the kinetic energy of an objent upon impact based on the measurement of force alone?
...

Dec2909 04:34 PM
Andrew Mason

1 
1,330 
Hi,
In my book, they use an example to explain motional emf. The example consists of a rectangular circuit with a...

Dec2909 07:20 PM
shespuzzling

0 
3,124 
Hey all,
This is a bit of a broad subject so I'm not sure which section it best applies to, but here it is anyway....

Dec3109 04:05 AM
A.T.

1 
1,631 
He says that Power net=EKA(T4To4)
Where Power net= net power loss or gain through radiation
E Emmisivity...

Dec3009 11:37 PM
Yeti08

2 
2,368 
I was just wondering if someone can help me visualize this expression:...

Dec3009 11:04 AM
ian2012

0 
736 
I am trying to calculate the force of a 2300 lb car hitting a wall at 40 mph. I know that momentum is mass x velocity...

Jan310 01:44 AM
FoxCommander

7 
16,220 
I am trying to write a simulation program for a relatively complicated mechanical system. Parts of it will be strings...

Jan310 08:47 PM
carrotstien

6 
1,737 
Hi all
I m really confused in these resistor questions..In some circuits they say that some are neglected coz they...

Dec3109 02:09 AM
anu_rox

0 
1,322 
Hey guys,
Do any of you happen to know how to derive the formula for General gravitational potential energy (not the...

Dec3109 01:54 AM
Matthias_Lightbane

2 
6,267 
Sorry about the endless stream of questions about Lagrangians. I am actually beginning to detest them a bit;p
...

Jan110 05:45 PM
vertices

8 
1,120 
light doesn't cotain any charge then how it fluctulate the electric and magnetic field in vacumn or medium.

Jan110 10:15 PM
amaresh92

6 
1,090 
I was studying for the AP physics and got stuck with this definition...
...So why is I = mrČ???
I looked at...

Jan210 10:31 AM
Lsos

5 
2,042 
I need some help in understanding the effect of change in intensity of the central maxima in respect of a single slit...

Jan310 10:32 AM
jtbell

4 
804 
Does a 60W Type A (general service) incandescent light bulb put out more light than a 60W Type B (candelabra torpedo)...

Jan110 04:18 PM
fuzzMan53

3 
633 
Hello guys.
I have issues understanding a rather simple physics concept and I hope you can help me out. I've tried...

Jan310 10:10 AM
booga

2 
682 
When a string is wrapped around a disk and pulled taut to rotate the disk, such as in a pulley, how can tension be the...

Jan310 11:37 AM
rcgldr

1 
726 
Hi Everybody,
I am descibing my problem here: I have a cylindrical closed volume(with diameter of X m, height H m)...

Jan310 12:57 PM
direct

0 
1,137 
Is it possible to polarize an EM wave in the time direction as you would in any of the spatial dimentions?

Jan310 08:22 PM
madness

2 
747 
Hi there,
I have a question about Coulomb's Law. Assume there is a uniform sphere charge distribution RHO and I...

Jan310 05:41 PM
jacksonwalter

1 
629 
just wanted to say hi first as this is my first post.
I will explain the story...
There is an ongowing debate within...

Jan410 11:41 AM
Marshall10488

2 
2,362 
Does dispersion of light by a prism have anything to do with how thin films disperse light of different colors at...

Jan410 11:33 AM
Bob S

2 
734 
A CONVEYOR WITH 40B20 SPROCKETS AND UHMW WEAR STRIPS TRANSPORTS 300LBS. I am trying to calculate the DRIVESHAFT...

Jan410 02:57 AM
amanphysics1

0 
6,858 
Hi !
How one can calculate the spectrum of radiation emitted by the oscillating electron
in the field of laser,...

Jan410 05:12 AM
quantum128

0 
1,890 