The aim of this thread is to highlight recent (as in within the past 3 months) noteworthy physics papers that have...

Apr814 10:13 AM
ZapperZ

166 
160,066 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Apr2211 05:27 AM
ZapperZ

2 
63,573 
I have the following question/problem of understanding:
I am thinking that the only way force or pressure can...

Nov2411 12:32 AM
klimatos

9 
1,625 
I remember reading/hearing a few times now that everything is vibrational energy and our senses detect and convert...

Nov2411 12:23 AM
Zula110100100

15 
3,618 
I need to show that this pattern is true.
\sqrt{n+1} \approx \frac{n}{2} + 1 \ \ when \ n << 1
the smaller 'n'...

Nov2311 11:07 PM
elfmotat

7 
1,255 
Kind of off the wall question but here it goes:
I am trying to figure if my set up for a CNC machine is one that...

Nov2311 06:17 PM
691175002

7 
1,413 
A car can accelerate 060 mph in 8.6 seconds and 0100 mph in 26.1 seconds. How far (in feet) would the car have to...

Nov2311 03:36 PM
Curramberus

5 
1,124 
For a reaction to occur, we assume that two particles collide, have sufficient energy to react, and are oriented...

Nov2311 02:46 PM
elegysix

5 
1,153 
Can someone please answer this question in terms of the forces acting?

Nov2311 12:09 PM
zoobyshoe

12 
1,400 
Is it possible to make mass elements flow by establishing a gravitational potential difference between 2 points in the...

Nov2311 09:15 AM
sophiecentaur

12 
1,540 
I'm doing a project in thermodynamics and after seeing the movie "atlas shrugged" tryed determining a method to...

Nov2311 07:34 AM
Vanadium 50

1 
2,153 
what are the main drawbacks of the van der waals equation of state for real gases and how are they corrected?

Nov2311 07:13 AM
Krishna0703

0 
633 
About 40 years ago when I was 15 my science teacher would occasionally collar me in the hallway and bellow, "What is...

Nov2211 07:46 PM
Integral

20 
2,347 
I'm writing a paper on the possibility of harvesting space lighting, but the main question would be, does space...

Nov2211 07:45 PM
Drakkith

21 
1,962 
Sorry to ask all of you but i have i wild idea about the creation of the universe and I’m not shore where to send...

Nov2211 04:02 PM
TLCU

4 
893 
Hey,
So I want to make an antenna which emits powerful waves in the frequency range of 150 MHz.
Yet I don't...

Nov2211 03:44 PM
zodian

4 
1,189 
frankly i dont know much about antimatter or super conductors.....i just read an intolevel topic on antimatter and...

Nov2211 03:38 PM
mathman

1 
806 
Can anyone give me ideas on how to heat a metal chromed roller to maintain 120 degrees on the outer surface. I...

Nov2211 11:12 AM
Walshy

14 
1,863 
Is it possible for a piece of cement in a rotating cement mixer to travel at constant speed?
If we graph a cement...

Nov2211 08:36 AM
nasu

3 
1,234 
Dr. Hughes, an Australian physicist has taken exception to the Oxford Dictionary’s definition of a siphon, ...

Nov2211 06:04 AM
McQueen

31 
2,555 
hi experts
can anyone explain waht is the dipole moment.

Nov2211 05:00 AM
ZapperZ

2 
1,350 
I've been trying to determine the optimun angle of launch 1,5 metres above the ground by pooceeding from the basic...

Nov2211 01:56 AM
willem2

14 
1,839 
Hi,
I've got a question about fitting a known function to a measured data.
Suppose I want to find X parameters...

Nov2111 07:37 PM
gsal

1 
885 
Can someone please help me solve this:...

Nov2111 02:04 PM
sarahmlipinsk

19 
1,821 
How do you use the equations
m=Minital + deltaM
and x=xinital + deltax
and F=mg
to...

Nov2111 01:54 PM
Zula110100100

4 
1,261 
Can we float an ocean liner in bucket full of water spread to a large area?

Nov2111 01:43 PM
DaveC426913

147 
12,774 
I am trying to understand what the formula v=sq rt( Bulk Modulus/density).
I understand that Bulk Modulus is...

Nov2111 12:33 PM
sophiecentaur

1 
1,031 
Is anyone good with Lagrangian mechanics applied to constrained systems?
I had a question about the Lagrange...

Nov2111 11:51 AM
Curl

2 
972 
About a five minute video....Note the introductory text informatin:
...

Nov2111 08:47 AM
Naty1

0 
703 
I m doing a project on solar illumination . I wanted to know which configuration of parabolic reflector/ collector is...

Nov2111 05:33 AM
sophiecentaur

4 
1,087 
Hi i just wanted to know if anyone can help me located a system diagram with atleast 5+ forces acting on it? P.S. the...

Nov2111 12:22 AM
Simon Bridge

13 
1,980 
Hi all,
Just a generalised question about rolling moments generated by an aircraft with a dihedral wing during...

Nov2011 11:24 PM
SubZer0

7 
1,085 
Coloumbs law states that the force exerted by two charged particles on each other is given by f = kq1q2/d^2
Now say...

Nov2011 05:18 PM
D H

12 
2,539 
I've made a search on PF about Gabriel Lafreniere and it seems that some serious people (such as Mysearch) consider...

Nov2011 04:13 PM
jtbell

6 
1,318 
Suppose I give you a curve
f(x) = \sin^2 (x) + ln(x)
And suppose I tell you to rotate this curve about the x...

Nov2011 03:15 PM
D H

7 
1,462 
If one wishes to look at where mathematics has influenced physics, there are an abundance of examples.
What are...

Nov2011 11:12 AM
homeomorphic

1 
672 
Hi
Please read the attached doc which is excerpted from the text University Physics by Young & Freedman.The...

Nov2011 11:07 AM
bksree

5 
1,264 
Electrons appear randomly in quantum physics, but are there any other places where particles behave randomly, is there...

Nov2011 10:12 AM
phyzguy

1 
782 
Can microwaves melt metal? As far as I know, it can't melt a spoon no matter how long you put it in a microwave oven....

Nov2011 06:51 AM
Ashlyn

24 
12,871 
Kirchhoff's Loop Rule: The directed sum of the electrical potential differences (voltage) around any closed circuit is...

Nov2011 06:28 AM
gsal

1 
1,075 
Ok, so i've been getting confused about some things recently. I've read that fluid flowing in a pipe at higher...

Nov2011 06:17 AM
sodaboy7

4 
5,976 
I am trying to understand how, for a given physical system it is possible to come up with the correct expression for...

Nov2011 05:29 AM
qtm912

2 
786 