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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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Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 63,560
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
ZapperZ
166 160,042
since i have always have been interested in combat sports i was just wondering what would happen if some one in the...
Aug12-10 05:00 AM
Mentallic
18 2,298
Dear forum, I have the following phisics problem. I want to be able to measure the impact of a punch in a regular...
Aug10-13 06:37 AM
mrspeedybob
3 647
I am a horticulturist not a physicist, hence the reason I am seeking your help. I am currently drilling holes in a...
Sep5-09 05:55 AM
Dadface
9 1,894
Yesterday I took a tour of the new Dallas Cowboy stadium and it is an engineering marvel. Above the field is a...
Aug25-09 05:48 AM
russ_watters
4 4,821
I am just wondering if pure carbon and graphite have the same resistivity? Resistivity for pure carbon = 3.5 x...
Oct20-09 08:12 AM
redargon
3 894
Dear Alls, I need your advice regarding my experiment in producing the High Voltage Zero Current, Pure Electrostatic...
Jan27-08 08:57 AM
TVP45
4 1,155
Hi. I'm new around here, and from Norway so please excuse my english/any other mistake I make. I have read several...
Feb9-12 04:53 PM
Drakkith
9 1,605
When charged particles aren't moving they produce an electric field. As the start to move and accelerate, the electric...
Sep4-12 01:16 PM
Simon Bridge
4 592
This has me curious. I am reading a Scientific American article, which the following is from(emphasis mine): In...
Jun10-09 10:58 AM
Nick89
11 7,941
I have a pretty simple question: What is the purpose of a resultant velocity in 2D motion? Is it used for anything...
Sep23-11 02:06 PM
robphy
2 1,345
Can someone explain in layman terms the purpose/function of the weak nuclear force?
Jul28-10 09:19 AM
QuantumPion
1 797
Hello, I'm new to this forum with little knowledge of physics. Does anyone know how to calculate the force...
Mar15-14 09:40 AM
DJLambo2K
2 339
Push! Not pull. Des Chamberlain The Idea that I want to set out here is so beautifully simple, it just feels right...
Oct17-04 05:44 PM
Des Chamberlain
88 10,530
Would it be easier to push or pull a snow sleigh? (no rope!)
Mar15-05 07:07 PM
Andrew Mason
1 2,315
Hello, I am new to the forums and having a discussion with my boss at work regarding when you are pushing something...
Jan13-11 04:06 PM
jambaugh
2 2,415
I'm trying to determine approximately how much (percentage) of an athlete's body weight is moved when doing a push-up....
Dec14-09 12:43 AM
Alcibiades
10 17,467
I just want to know if I am understanding this correctly. I am wondering what effect the rolling resistance has on...
Oct12-12 12:15 PM
Pkruse
1 1,105
I am trying to fully understand Newton's Third Law. I am getting there, but there are a few examples that sort of have...
May30-11 04:15 AM
willem2
3 2,268
Hi there I have been posed a brain teaser: If pushing against a trolley, if there is an equal and opposite...
Jul22-12 01:40 PM
SUDOnym
3 949
If you were to push a wall and it were to not accelerate, would this mean you did not apply force to the wall...
Apr1-11 07:33 PM
Drakkith
2 1,560
When you push your finger into the bread you see how it drowns and makes a hole after a short while. Also when you...
Apr24-06 06:36 PM
eeka chu
2 885
No need to make this question any more difficult than it needs to be. Simple, right? Please view the attachment, as it...
Sep20-08 07:01 PM
moparhomo
2 1,511
There's a rather comical attempt being made in Bangkok to push the Chao Praya river out to sea faster using...
Oct22-11 08:22 AM
xts
34 4,392
Put a one rupee coin over a piece of card paper placed on an empty glass push the card with a sudden stroke of finger...
Mar1-11 04:25 PM
rcgldr
4 2,662
What we see as motion and matter is created from multiscale similar interactions /1,2/. Toward the source of origin...
Apr1-03 02:16 PM
Loren Booda
2 1,284
Hello, Chitose wonder chick again. First, This is NOT my homework....
Jan22-10 07:44 AM
Borg
3 4,329
In the way we represent an electromagnetic wave (click on...
Jun14-12 08:02 AM
mfb
1 752
Iím trying to figure out what may be very simple but I canít find any examples online or in Physics books. The goal is...
Nov26-12 03:41 PM
Labeno
12 976
Dear forums Hello. I teach physics, and whilst I think that my knowledge is fairly sound, once every now and I...
Aug25-12 03:48 AM
rcgldr
21 1,792
This is a question that has kept me awake, trying to rationalise it: Current is rate-of-change-of-flux (or charge...
Sep3-12 08:50 AM
daviddeakin
3 482
Hello, When the Celsius temperature was first defined, it was defined by saying that 0įC was the freezing point and...
Sep24-10 08:26 PM
epenguin
37 3,381
At the time, it is cramped in the microcosmos of forum Theory Development; therefore I scrambled out to take the fresh...
May31-04 06:04 PM
vlamir
26 2,993
Hello forum Since my student days i was wondering about how is it possible to represent the cycle of the gas in a...
Nov10-11 10:16 AM
miko1977
2 819
For a perfect gas PV = nRT. This is a very handy little equation that allows determination of temperature given...
Oct20-10 08:46 PM
jdlawlis
11 2,729
What is present and projected efficiency of pyroelectric heat to electricity converters? What is efficiency of such...
May31-09 12:42 AM
Stanley514
0 1,099
Are pyroelectricity and the peltier-seebeck effect the same thing?
Feb1-05 09:18 AM
Gonzolo
2 4,677
Both of them are non-contact thermometer right ? So,what are the main different between them actually ?
Mar8-11 09:28 PM
soonsoon88
0 941
Hi From what I understand ferromagnetic materials have domains that contain magnetic dipoles that are almost all...
Sep8-13 04:45 PM
parsa418
2 509
There are two expressions of electric field between two parallel plates,say one carries Q and another carries -Q Then...
Feb6-14 06:42 AM
sophiecentaur
4 371
I've heard that Sun is not hot enough to sustain thermonuclear fusion at the level we observe. Instead, the solar...
Oct30-10 09:10 PM
mrspeedybob
9 1,503

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