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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
47,702 
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 
3,157 
I am trying to figure out which way a spinning dinner plate (idealized as a disk) precesses when you toss it in the...

Feb510 07:51 PM
Bob S

20 
5,248 
I have asked and I have asked, an no one has yet answered. I'm pleased to have discovered this free meeting place...

Feb510 11:12 PM
pallidin

26 
7,979 
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 
1,818 
Hi,
I am in Purcell's E&M book at the section explaining why the field is zero inside a hollow conductor of any...

Feb410 03:26 AM
Tomkat

3 
2,885 
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 
2,198 
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 
1,229 
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 
1,947 
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 
631 
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 
2,032 
Hello.
I am having trouble realizing the following relation holds in Lagrangian Mechanics. It is used frequently...

Feb510 04:33 PM
turin

10 
1,489 
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 
3,510 
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 
1,742 
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 
1,024 
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 
2,199 
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 
1,965 
I could use a general discussion of magnetic helicity  beyond the Wikipedia blurb  its mathematical properties and...

Feb110 09:41 PM
wofsy

0 
645 
we know that vector potential in a resonator satisfies the equation...

Feb210 06:50 AM
clem

1 
810 
I have always thought centrifugal force existed. My physics teacher last year told me it doesn't. I did some research...

Feb510 03:08 PM
Newtons Clock

13 
1,939 
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 
1,087 
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 
1,241 
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 
764 
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 
5,354 
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 
760 
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 
1,758 
Hello!
Does anyone have a free ebook of Chemical Thermodynamic by Peter Rock A.?

Feb310 05:32 PM
fluidistic

10 
2,685 
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 
1,023 
Why are capacitors used to give pules of very high potential difference (for e.g. x)?...what's the advantage?
The...

Feb410 11:52 AM
Bob S

5 
2,162 
i don't know what a homework problem is...i don't go to school..all i know is concepts are cleared when you think...

Feb410 01:47 PM
Shahid0072

23 
2,044 
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 
2,506 
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 
1,039 
A battery doesn't work if you connect it negative to negative correct? It's not a proper circuit.
Well, in Physics...

Feb510 05:57 PM
kusiobache

6 
964 
One of Maxwell's equations says that
\nabla\cdot\vec{B}{=0}
where B is any magnetic field.
Then using the...

Feb510 08:18 AM
willem2

1 
754 
Mass on a string undergoing uniform circular motion by hand:
I was taught that the centripetal force F = mV^2/R is...

Feb510 01:27 AM
rcgldr

7 
9,772 
Hi,
I am preparing to Thermal Physics exam. , and I think there are some basic subjects which I don't understand:
...

Feb510 03:32 AM
naftali

10 
3,340 
Hi,
I wanna know how high the flow rate trough a pipe is (outlet), but I only now the pressure difference (0.7MPa or...

Feb410 10:43 AM
apekattenico

2 
14,528 
So I have had a question running through my head for a while now.
Can a magnetic field be projected???
I guess...

Feb510 11:44 AM
Bob S

2 
1,678 
I'm having problems understanding pressure reduction in valves.
1) If gas goes through an expansion valve,...

Feb510 02:58 PM
chrisbolivia

0 
2,211 
I know the definition of the electric dipole moment is given by \mu = e x, where e is the charge of electron and x is...

Feb610 06:56 AM
tinytim

1 
1,508 
Hi!
Work is defined as
dW = F\cdot dr
so there is no work required to keep things spatially fixed in a...

Feb610 06:59 AM
FredMadison

10 
1,022 