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Aug12-14 11:12 PM Simon Bridge 
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All physics courses. PDFs, tutorials and web links.
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Jan16-12 Greg Bernhardt
The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...
Sep5-14 05:07 PM
DennisN
170 192,213
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 71,187
We know that to observe diffraction the width of the apertures in the grating must be of the order of the wave-length...
Jan22-09 05:18 AM
jtbell
2 4,095
Hello, During the spring semester of school that is just beginning I will be a junior in physics at the University...
Jan21-09 11:25 PM
Chronothread
3 1,756
So it has always been my understanding that in order for something to electrically conductive it has to have more...
Jan21-09 08:28 PM
zoobyshoe
4 10,854
Given only the rate of flow in gpm and the inside diameter of a hose in inches, is it possible to calculate the...
Jan21-09 04:47 PM
srntcbd
5 20,055
The equation I have for velocity through a circular orifice plater is as follows: Ud =...
Jan21-09 01:14 PM
boka33
0 2,131
I am trying to relate two concepts, Power and Kinetic Energy, using a small DC motor. Given the no-load max angular...
Jan21-09 12:20 PM
DamoPhys
0 3,613
Thanks for your patience and time. I think I'm getting closer to an understanding. Sanity check. Would you agree...
Jan21-09 05:00 AM
Lester Welch
2 1,167
On Jan 19, 9:43 pm, Ian Parker <ianpark...@gmail.com> wrote: ] > The question I would ask, I am afraid I don't...
Jan21-09 05:00 AM
Chalky
1 1,056
Hi I'm supposed to come up with a design for a pendulum experiment. I have most of the design figured out but in...
Jan21-09 01:09 AM
atyy
5 4,346
I thought these were weird similarities between macroscopic electronic circuits and (Bohr) hydrogen model. What do...
Jan20-09 06:47 PM
ZapperZ
24 2,844
Sorry to ask such a simple question but I appreciate the level of knowldege you guys have. What is the equation for...
Jan20-09 06:20 PM
Nabeshin
8 2,502
Whenever I cook something in my microwave, sometimes there will be a bug in it and it won't be affected by the...
Jan20-09 04:53 PM
mgb_phys
1 2,959
When measuring the permittivity of different dielectrics between parallel pate capacitors the capacitance will change...
Jan20-09 04:51 PM
madmike159
0 1,354
Hi in a couple of weeks i'm going have and physics project in school. I have decided to make the project about...
Jan20-09 10:17 AM
ebp
0 2,726
Me and some friends where down the pub and an interesting idea came up. say a fly is flying and collides with an...
Jan20-09 07:34 AM
vanesch
15 2,047
Hi. I am designing an experiment focused on radio waves for my experiment and this is the basis of it: Three...
Jan20-09 07:01 AM
prime-factor
8 1,676
Hey everyone. I'm working on a project that will incorporate a wireless accelerometer on a model rollercoaster. My...
Jan20-09 05:09 AM
rcgldr
3 3,446
hi http://sites.google.com/site/jackokring download uncertain-geo.pdf maybe also pole-free.pdf ... Now for the...
Jan20-09 05:00 AM
Jacko
0 1,222
Wollenleben: >If I understand this correctly then we can say more generally: If there >is a metric then the pair...
Jan20-09 05:00 AM
Bossavit
4 894
--- THREE MAGNETS (N-dipole-body problem) --- imagine 3 bar magnets sitting on a table randomly spaced. they are...
Jan20-09 05:00 AM
abaraba
0 762
Hello to all. I am a golf course designer and am researching information on the slope and the roll of a golf ball...
Jan19-09 08:22 PM
geoffmangum
7 8,456
How long at least must I turn off my fluorescent lights to save energy?
Jan19-09 06:25 PM
mgb_phys
10 4,538
Dear physics forums I am an A-level physics teacher and I have built, admittedly, a VERY simple circuit. The...
Jan19-09 04:34 PM
fizz_it
22 4,089
i know you can ionize water to make it magnetic, but some people claim if you put a glass of normal water on a magnet...
Jan19-09 04:11 PM
fizz_it
14 22,672
what happens when u apply DC voltage across the inductor? i.e is the voltage drop only across the series internal...
Jan19-09 04:05 PM
fizz_it
5 2,053
You know that dirty disgusting snow that accumulates on sides of roads over the winter, and then doesn't melt until...
Jan19-09 06:45 AM
Ranger Mike
3 1,452
Dirac's theory of the electron predicted that there were identical particles of equal mass but of negative energy. ...
Jan19-09 06:37 AM
wofsy
13 3,097
1. Why is the impact force reduced for a helmet with a soft interior vs.a hard interior? 2. How is the safety...
Jan19-09 06:27 AM
Ranger Mike
3 2,601
This might seem like a bad question.. I'm having trouble understanding the basic concept of electromotive force...
Jan19-09 05:38 AM
roonaldo17
0 1,375
This is a test posting to help debug some new moderation software. You can ignore it (unless you're the author).
Jan19-09 05:00 AM
Jonathan Thornburg
0 748
This is a test posting to help debug some new moderation software. You can ignore it (unless you're the author).
Jan19-09 05:00 AM
Jonathan Thornburg
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This is a test posting to help debug some new moderation software. You can ignore it (unless you're the author).
Jan19-09 05:00 AM
Jonathan Thornburg
0 728
This is a test posting to help debug some new moderation software. You can ignore it (unless you're the author).
Jan19-09 05:00 AM
Jonathan Thornburg
0 812
This is a test posting to help debug some new moderation software. You can ignore it (unless you're the author).
Jan19-09 05:00 AM
Jonathan Thornburg
0 784
Hello out there. I am seeking anyone who works at Lawrence Livermore. I have a background in physics and am...
Jan19-09 05:00 AM
joel
0 483
Hi there, I'm would like to know how to calculate mechanical resonance frequencies of material and form. ie. the...
Jan19-09 03:29 AM
jze
3 2,400
As I lay here at 2am contemplating the vastness of the universe, and scanning my DVD collection so I can either put...
Jan18-09 08:10 PM
DaveC426913
13 1,844
Imagine I shoot a boulder vertically into the air with a massive cannon. Its kinetic energy is converted into...
Jan18-09 07:22 PM
DaleSpam
2 993
Nice to meet all of you :smile: We know that laser is amplified light. There's possible if amplify the...
Jan18-09 04:29 PM
Cthugha
12 1,922
I've read about new scientific discoveries in cloaking devices that bend microwaves and make it appear as though the...
Jan18-09 03:32 PM
LURCH
2 1,391

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