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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
47,001 
So I'v been taught throughout highschool and now in college that a magnetic field has "lines of force". Also that they...

Feb210 11:17 AM
EngineerCanuk

10 
3,125 
Can gravity be expressed in terms of the second law of thermodynamics?

Feb110 05:15 AM
superconformal

1 
2,340 
Hi All
When mixing water and oil, one produces an immiscible system of two liquid phases. Some cosmetic products for...

Feb310 04:30 PM
DaTario

1 
1,807 
I have been using Born and Wolf's Principles of Optics for a project but I don't quite understand the concept of...

Feb210 06:54 AM
clem

3 
2,167 
When a charged body is brought near an insulator, the side facing it acquires a charge of opposite sign because of...

Jan3010 01:05 PM
GRDixon

5 
5,130 
The nonrelativistic Larmor formula for the power radiated by a point charge is proportional to the charge’s...

Jan3010 01:02 PM
GRDixon

4 
1,649 
In one of my undergrad books on physics is the example of a rail truck of mass M on a frictionless railroad moving at...

Feb110 10:05 AM
Zhivago

6 
1,205 
I am confused about the KE = 1/2mv2
I was able to get v2=2as from it, by removing mass from each side you get as =...

Jan3010 10:15 AM
Doc Al

3 
847 
If we have a resonator composed of 2 partially transmitting mirrors/grids and we excite the resonator from one end,...

Jan3010 06:07 AM
H_man

2 
1,065 
I am trying to get a "complete" picture of what happens in circuits. I know how to solve typical physics circuit...

Jan3010 12:35 PM
Climber

0 
1,912 
Hi PFians
I searched net for hours about understanding the concept of streamlines, streaklines and pathlines but I...

Jan3010 11:14 AM
R Power

3 
4,270 
2 plane waves do 1 slit diffraction, one comes perpendicularly to the slit, the other with an angle theta.
Rayleigh...

Jan3010 11:06 AM
ibc

0 
564 
I'm working on trying to understand wave propagation. In particular, I'm trying to understand directional wave...

Jan3110 10:17 AM
Andy Resnick

6 
1,106 
I have a problem with my train of thought.
I have narrowed it down to several premises, and I think that one of...

Jan3010 03:43 PM
tinytim

5 
1,245 
Greetings,
In Feynman's lectures  vol. 2 either chap 19, 21 or 23  I think 23 (I'm at work and don't have the...

Feb210 05:02 AM
gnurf

5 
1,898 
Hey guys,
Im trying to derive the following equation
(mc^2) +cos(theta)=1
E1 = Incident Photon's energy
E2...

Jan3110 07:25 PM
vela

3 
896 
http://prepgenie.co.nz/gamsat/gamsatquestions/gamsatsamplephysics/
hey theres a question here if you scroll down a...

Jan3010 09:14 PM
!kx!

1 
542 
I guess people who know can help. I know that the final formula should look like this:
(OMEGA) = 4tan^(1) , where...

Feb110 03:14 PM
mathman

1 
626 
hi,
what happens, when I hand on a spring a heavy object and then we'll rotate the spring? I've tried to write down...

Jan3110 09:17 AM
PhanthomJay

1 
1,147 
HI
I was a under a little confusion about vector field.
Consider velocity field of fluid flow:
V = u i + v j...

Jan3110 06:16 AM
R Power

2 
2,073 
Hi All,
I'm not sure exactly what is considered classical physics.
I always thought it was everything before...

Jan3110 02:36 PM
wofsy

2 
1,540 
Ok so i have the distance travelled of an object assuming air ressistance is 0 and the distance travelled with air...

Feb110 11:58 AM
Bob S

3 
2,010 
One postulate of sta mech is all accessible microstates are equally probable in thermal equilibrium, while according...

Jan3110 08:14 AM
kof9595995

0 
796 
Hello!
Can someone just guide me? I was calculating thermodynamic functions of some ions and a classmate showed me an...

Feb110 03:48 PM
kthouz

0 
3,489 
I don't really know much about serious business electrostatics. I've only taken the AP Physics C E&M exam (using the...

Feb210 03:05 AM
WraithM

1 
1,729 
OK, having some trouble wrapping my head around this so would appreciate some clarification.
Let us say I had a...

Feb210 05:32 AM
Doc Al

4 
1,013 
Thinking in terms of the conservation of energy, it seems to make sense that if you took a relatively elastic rod with...

Feb210 04:18 AM
Lok

1 
2,178 
If my resonator is shorted at one end and has a partially transmitting grid at the other end is it correct to use S...

Feb210 08:56 AM
H_man

2 
1,946 
I could use a general discussion of magnetic helicity  beyond the Wikipedia blurb  its mathematical properties and...

Feb110 09:41 PM
wofsy

0 
639 
we know that vector potential in a resonator satisfies the equation...

Feb210 06:50 AM
clem

1 
805 
Hi..A disk A and disk b are rolling without slipping with same speed on a horizonal surface..Disc a rolls up an...

Feb310 12:37 PM
Shahid0072

15 
1,076 
A 2.20 kg mass oscillates on a spring of force constant 250.0 N/m with a period of 0.615 s. Find the damping constant...

Feb210 04:55 PM
tyler.brown

0 
1,232 
A 0.300 kg mass moving the end of a spring with force constant 2.50 N/m is acted on by a damping force F=bv. If the...

Feb210 05:13 PM
tyler.brown

0 
759 
Oh hello there!
I have a question about the normal force!
In my mechanics class we are CONSTANTLY told that the...

Feb310 07:17 PM
cesiumfrog

7 
5,304 
Hello, I have a question
Lets say you have a container of water that weighs 10 pounds including the water/container...

Feb210 11:17 PM
DaleSpam

1 
753 
For example, if one end of a rope is attached to a wall, and the other end is attached to the floor (at an angle), if...

Feb310 06:37 PM
cesiumfrog

5 
1,727 
Hello!
Does anyone have a free ebook of Chemical Thermodynamic by Peter Rock A.?

Feb310 05:32 PM
fluidistic

10 
2,656 
I am checking through an essay on electromagnets and i think some sentences don't quite sound right. Maybe cos they...

Feb310 03:34 AM
xunxine

0 
1,019 
I want to find the motion of an electron in a spatially varying magnetic field using finite element analysis, and have...

Feb310 10:01 PM
Bob S

3 
2,466 
I am confused on how a centrifuge separates particles by density. In wikipedia, it says it accomplishes this according...

Feb310 10:52 PM
russ_watters

4 
1,025 