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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...
May6-14 04:32 AM
Cthugha
168 189,777
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Apr22-11 05:27 AM
ZapperZ
2 70,281
can a liquid be induced with charge i.e. Can we create sites of localisation of positive and negative charges in a...
May20-13 12:20 PM
projjal
1 656
If mass and energy of universe is constant then what 'thing' does the 'work'?
May20-13 12:12 PM
epsilonOri
5 776
Is it not possible that, given a powerful enough magnetic field, the binding energy of an electron in a stable,...
May20-13 11:59 AM
stillwatcher
7 2,066
I have been looking into projectile motion equations and am struggling to find suitable ones that cover a projectile...
May20-13 10:53 AM
BruceW
6 925
I am trying to find the approximate force imparted on a piece of iron on the axis of a finite length solenoid. One...
May20-13 10:33 AM
dgreenheck
0 665
How much energy is 200 MeV ? And how much destruction can it cause ?
May20-13 09:18 AM
ZapperZ
1 2,599
In the derivation of drift velocity i have seen two variations and want to know which one's correct. s=ut...
May20-13 08:30 AM
ZapperZ
2 1,235
Hi all I have measured the resonance frequency of a resonator as a function of time by mean of a Laser-Doppler...
May20-13 04:33 AM
f95toli
4 1,247
I am wondering ? is it possible that the constants that govern the laws of physics was different during other periods...
May19-13 08:09 PM
Zmunkz
4 951
In early physics, i learned a force was simply a push or pull, talked about as a number of newtons or pounds, such as...
May19-13 07:49 PM
Popper
14 1,067
Now, I'm not sure if I misunderstood the text book but I read that magnetic fields and forces don't actually do any...
May19-13 02:47 PM
Popper
8 1,068
A quick question. Let's say you had an infinitely long wire carrying a constant current, and a straight piece of...
May19-13 02:29 PM
BruceW
11 902
Hey guys. We were given a problem, which was to consider bv^2 as the force acting upwards on a body falling in...
May19-13 12:19 PM
tamtam402
1 679
Would you say voltage drop across a resistor is directly proportional to the resistance. I am trying to understand...
May18-13 04:36 PM
sophiecentaur
40 19,092
I need suggestions for a type of surface that you could be able to put on the bottom of your shoe and be able to slide...
May18-13 08:56 AM
Danger
4 920
What is the reason for the potential drop when current flows through a resistor? Is it due to conversion of potential...
May18-13 07:03 AM
NascentOxygen
1 613
We all understand what metres PER second (m/s) physically means... but, What I was wondering was what does a...
May18-13 05:05 AM
lightarrow
5 1,154
I was reading in my textbook the definition of a scientific law: must be found experimentally valid over a wide range...
May17-13 10:22 PM
Popper
3 855
Hello to everyone, http://i40.tinypic.com/2a5hyd3.gif I am trying to calculate how much physical force is needed...
May17-13 06:58 PM
russ_watters
42 2,354
I have a very simple question. If a hole is made at the center of a metal plate and it is heated to increase its...
May17-13 06:05 PM
Chestermiller
7 1,255
While reading up the recent hoopla about DWave's new "Quantum Computer" I came across a practical question about...
May17-13 04:37 PM
256bits
6 855
consider a pendulum. The mass 'm' is hung and now we are interested in finding the velocity so that it completes one...
May17-13 09:33 AM
InfinitySucks
8 879
Hello physics forum! As a youngster, it is a great honor to be surrounded by innocent minds. For this, thank you. ...
May17-13 06:21 AM
Redbelly98
6 694
At 110Kev they block above 90 percent but I wonder about other lower frequencies specifically microwaves and radio...
May17-13 05:53 AM
CWatters
1 712
I posted it in math, But I think maybe it is more physics then math... Hello, I'm trying to understand the...
May17-13 02:24 AM
amirams
0 537
Hey guys, I was doing some research and I am confused since I can't seem to get a straight answer. I wanted to know...
May16-13 07:51 PM
Popper
6 894
Hello everybody, i have got a question about the concept of centripetal force in general. Imagine a gondula of a...
May16-13 11:52 AM
Sheldon123
5 1,273
Is there an alternative to making antimatter that would make it more cost efficient? Or is high energy physics the...
May16-13 10:42 AM
NetMage
18 1,300
I hear they emit radiation which deionizes atoms. Is this due to the frequency of the x-ray? Is x-ray light considered...
May16-13 10:10 AM
DEvens
36 2,095
first question, would there be more rayleigh scattering on neon gas vs air? im wondering if you have a tube of neon...
May16-13 09:50 AM
DEvens
1 635
Hello, I don't understand how changing the amplitude does not change the period but changing the length of the...
May16-13 09:49 AM
WannabeNewton
3 1,324
If energy is kept constant and intensity of photons is increased, will the threshold frequency be lowered? I ask...
May16-13 09:19 AM
sophiecentaur
2 795
Im just interested to know because apparently there is something faster than the speed of light and the fastest thing...
May16-13 09:05 AM
ZapperZ
5 887
Though it may seem like it, this certainly isn't a homework question so I hope I don't offend anyone with it's...
May16-13 07:29 AM
rsmutt1978
7 732
Hi, If i use a spoon with a hole in it in a cup of water, bubbles emerge. Does that mean that air got in? ...
May16-13 05:51 AM
CWatters
5 648
So in advance I know that this has little practical application, but it was a fun math problem for a high school...
May16-13 12:16 AM
Simon Bridge
1 663
If a resistor shares common junctions to a conductor with no resistance in a circuit, will current flow through the...
May15-13 11:41 PM
SammyS
12 1,349
If I am in orbit around earth that means that I am in constant free-fall around earth. Is this an inertial reference...
May15-13 11:00 PM
WannabeNewton
7 752
Can anybody say me why always like poles repel and unlike poles attract but not why like poles attract and unlike...
May15-13 07:27 PM
Khashishi
2 797
Hi, I'm trying to understand the mass conservation equation for a pulsating sphere which has thickness dr. Please...
May15-13 03:51 PM
physwizard
2 762

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