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Quality answers to common physics questions
May25-09 10:31 AM ZapperZ 

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General Physics

- Nature and properties of matter and energy. For any physics topics not applicable to the categories below.
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The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...
Apr8-14 10:13 AM
166 160,066
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
2 63,573
Is there an alternative to matlab for simulating equations, I am looking for a way of getting some intuition for...
Dec13-11 08:43 AM
1 896
I mean that when i start to read a book on fluid mechanics I can see particular cases of compresible, incompresible,...
Sep6-10 02:33 PM
2 1,391 the only way to reach to quantum gravity..?.or are another ways..(such as canonical quantization)..i say that to...
Apr11-03 07:46 PM
1 1,619
“mirage” is refraction phenomenon or total internal reflection phenomenon?
Oct5-09 09:00 AM
1 5,132
My chemistry book says something like this: “Longer” electron delocalization is (at diens longer C atoms array),...
Jul3-05 12:07 PM
Dr. Nick
0 1,200
Hi. I am having trouble with understanding the resistor. What does a resistor do in SERIES or in PARALLEL circuit? ...
Mar7-09 10:15 AM
5 2,781
Hello! Suppose there is a meter stick suspended from and parallel to a table. On one end, the meter stick is held up...
Nov11-13 08:51 PM
1 493
1. EM wave can be reflected by metal surface only. Right? 2. SONAR can be reflected by any materials. Right? 3....
Jan6-05 11:30 AM
8 1,013
Recall carefully the best physics idea you've seen posted on Physics Forums - one that might be worthy of publication...
May31-04 07:53 PM
Loren Booda
0 1,048
There doesn't seem to be any difference between n = (1-\delta) - i\beta (the refractive index in the x-ray regime,...
Aug21-08 10:06 PM
0 3,684
Hello, I've the pleasure to announce that my PHD thesis is now online at the following url:...
Oct11-06 02:43 PM
0 634
The Study of Cycles Edward R Dewey formed the Foundation for the Study of Cycles in 1941 as a result of studies he...
Oct12-06 04:54 AM
Cycles Research Institute
0 898
Hi everybody! Just 2 important notes: I don't study physics and so I'm not sure if this question belongs here (but...
Sep21-13 11:22 AM
Claude Bile
5 651
Folks, I'm reading the 3rd edition of Thin Film Optical Filters by Macleod, and I've derived his expression for...
Apr14-08 10:52 PM
1 1,817
Hi friends, although I guess most of us are getting too old for the school, here is the link to the Ph.D....
Mar1-06 06:00 AM
Gabriele Honecker
0 1,127
Hi friends, although I guess most of us are getting too old for the school, here is the link to the Ph.D....
Nov4-06 03:27 PM
Gabriele Honecker
0 1,055
Dear spr£¬ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ Best Regards, ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡Lixin Xu
Nov4-06 03:18 PM
Lixin Xu
0 1,012
Atoms in a light bulb filament with house current are heated to the point that they readily emit visible light...
Aug25-04 06:51 PM
2 1,235
Hello, I am trying to find the proper thickness of a disk. In the center of the disk I will attach a steel rod which...
Oct15-03 07:23 PM
0 2,697
Hello all: The Dirac algebra yields a set of well-known trace theorems, including Tr = 4 (1) where a/ is...
Jul2-07 05:46 AM
Jay R. Yablon
0 1,533
why do they always speak about space and time in package. are this magnitudes sort of related?
Apr4-03 11:42 AM
3 1,545
.- Does anybody know a reference for an intuitive model of the work function? If not, is there a simple quantum...
Jul12-03 07:08 PM
1 1,524
For heterotic string theories, what is meant by 'discrete' and 'continuous' wilson line compactification? Can anyone...
Sep8-07 05:00 AM
0 1,639
What reasons do we have to believe that we need to quantise gravity? Has anyone done any work akin to Bohr and...
Oct11-06 03:09 PM
Hontas F. Farmer III
30 1,195
Hello guys, I would like to know the main reasons why the push gravity concept is not considered as a viable...
Jul23-06 01:15 PM
9 1,729
Hello guys, I would like to know the main reasons why the push gravity concept is not considered as a viable...
Jan8-07 04:41 PM
9 5,818
Can anyone clarify me why the eta' is named with a mass in parenthesis? I believe this notation is reserved for...
Feb20-06 06:00 AM
0 751
This question was raised a few times in recent discussions, but I don't think we got to the bottom of it. The...
Oct12-06 05:07 AM
Eugene Stefanovich
299 6,228
According to Polyakov, the 2+1 dimensional compact U(1) lattice gauge theory is in the confining phase, due to the...
Feb22-06 06:00 AM
0 1,024
This is a plea for the experts to refine my understand: As I understand it, the current state-of-the-art on...
Aug25-07 05:00 AM
Gen Zhang
3 1,127
I have often looked to the night sky and wondered what keeps all these zillions of stars apart. Centrifuge I feel is...
Oct20-03 11:50 AM
25 3,542
I have heard a theory for cosmology that involves bubbles having formed at some point. This seems to be consistent...
Apr20-06 04:00 AM
5 811
As shown here: the Greeks might have been fooled by fool's...
Dec4-06 09:03 PM
Gerard Westendorp
21 3,753
Hello. I appreciate that the polarization of the vacuum, in terms of virtual electron-positron pairs, is supposed to...
Jul1-07 05:50 AM
Neil Bates
0 934
can you make one sentence explanation (definition) for physics.
Dec15-03 11:59 PM
20 2,084
Hey, can anyone explain what Doubly Special Relativity is in simple terms that someone who has just learned what...
Jun11-03 06:10 PM
Greg Bernhardt
1 2,050
In the following I describe a theory in simple terms that might be an answer to this question. With respect to this...
Aug11-04 12:19 AM
0 1,153
What is mass, really? Can it, for example, be defined mathematically in terms of the scalar curvature of the...
Oct12-06 05:02 AM
LEJ Brouwer
0 530
What must be present for the propagation of a mechanical wave?
Apr16-08 10:14 AM
9 1,553
All right. It's a really simple concept to state, but a really difficult one to grasp. I'm curious about a specific...
Aug31-03 08:29 PM
15 2,576

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