Before posting anything, please review the Physics Forums Global Guidelines.
Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,737 
Im having a bit of trouble using Newton's Law of cooling. I have been given the formula T(t)=T_s + (T_0  T_s) e^{kt}...

Apr110 09:21 PM
angel101

8 
19,254 
Hope iposted this question in the right spot!!!!.
If i launched something in space and then stopped its forward...

Apr210 12:37 PM
LURCH

7 
886 
Hi
The phase difference associated with a light wave going through a birefringent material is given in this link...

Mar2910 03:22 PM
0xDEADBEEF

6 
1,935 
Hi,
I was looking for a book that would explain classical field theory in a Hamiltonian setting. What I mean by...

Mar2810 01:25 PM
Fredrik

7 
3,451 
What is the correct way to use a fidicual marker to measure the time period of a pendulum?
Thanks

Mar3110 03:14 PM
0xDEADBEEF

1 
938 
Hi,
The simple definition of work done by a constant force on moving a constant mass is
(size of) force on object...

Mar2910 01:46 PM
Studiot

5 
1,132 
I understand that friction is the force that opposes motion and that rubbing two objects togethere generate heat. But...

Mar2810 09:40 PM
Andy Resnick

17 
10,624 
If two plates of area A and seperation d contain liquid in between with angle of contact 0 degrees, then what is the...

Mar2810 11:15 AM
freireib

1 
722 
I am having trouble understanding a basic problem in fluids that came up during an exam I took last quarter. Namely,...

Mar3010 03:34 PM
0xDEADBEEF

1 
644 
I ran a search for gyroscopes looking for a definitive solution to the "What causes Precession?" and found no good...

Mar3110 04:01 PM
Cleonis

4 
2,993 
As a tennis player, I'm interested in the effects of top spin in tennis.
I've done some research, but find myself...

Mar3010 04:11 AM
Invokion

7 
5,684 
Hi,
Let's say a 10 kg particle (X) whose volume is 1 m3, and another 10 kg particle (Y) whose volume is 1*1024 m3....

Mar2910 03:26 PM
Atran

9 
1,686 
in collision we all talk about only momentum and energy. but which form of energy only kinetic no sign of potential...

Mar2810 11:08 AM
freireib

3 
675 
i have took a basic course in fluid mechanics:
Bernoulli equation states that:
P + (1/2)*ρ*v^2 + ρ*g*h = constant...

Mar2810 05:27 PM
Studiot

1 
769 
ok, lets say we have a battery connected to a resistor and an inductance in series
battery+______...

Mar3010 08:00 AM
quietrain

3 
1,481 
Hi guys,
What is the reason for actionreaction force pairs to arise?
Is it a consequence of electrostatic...

Mar2910 03:08 PM
0xDEADBEEF

2 
920 
Please help.
I want find any book to see detailed solving of Poisson equation for point charge.
Thank you in...

Mar2910 11:07 AM
areg

0 
1,179 
There is an example in my lectures notes I am having trouble following through:
A particle moving in a rotating...

Mar2910 12:40 PM
ian2012

0 
712 
Hi,
Why the wave equation is
\frac{\partial^2 u}{\partial^2 x}=c^2\nabla^2 u?
Where does it come from?Thanks.

Mar2910 04:36 PM
Integral

1 
590 
Hi
I´m selfstudying Alonso and Finn´s Mechanics and I have a question about this subject.
Let a body rotate...

Mar2910 06:51 PM
jpas

2 
1,036 
I'm sure I'm not thinking of this the right way. I'm hoping someone can see the error in my logic.
Should a force...

Mar3110 08:00 AM
Stonebridge

5 
1,959 
Hi guys. I am working on making a haptic device for a baseball simulator. Now the problem is that I want to replace...

Mar3010 05:14 PM
DMajor

2 
802 
i guess my question is actually really really simple.
lets consider rotation in the xy plane so that L points in...

Mar3110 04:28 PM
rcgldr

12 
1,714 
When a dielectric material insert between two plate capacitors the conductivity may increase.
Normally we talk that a...

Mar3010 09:34 AM
Apteronotus

1 
1,047 
Hi,
I have two questions about electromagnetism that I would like to ask. The 1st one is as follows:
I have two...

Mar3010 03:12 PM
0xDEADBEEF

2 
1,149 
ok, the magnetic field through a single ring is n\muI ,
so the flux is BAcos(theta), with cos(theta)=1, flux = BA =...

Mar3110 09:31 PM
quietrain

4 
1,999 
I am studying differential equations from this book by Edwards and Penney, and I seem to have stumbled on this rather...

Mar3010 12:58 PM
Fightfish

3 
890 
I am confused about the concept of product of inertia.
Wikipedia says: "Here Ixx denotes the moment of inertia...

Mar3110 02:42 PM
Filip Larsen

1 
1,511 
Alright, I'm confused about why thermodynamic cycles can never have 100% efficiency. There reversible processes right?...

Mar3010 05:42 PM
russ_watters

2 
1,357 
I have become very interested in electricity and magnetism and I would LOVE to get more hands on experience than the...

Mar3010 08:58 PM
Xyius

0 
582 
I'm in the middle of studying for the MCAT, and just want to get all the concepts instead of memorizing how to solve...

Mar3110 04:55 AM
Doc Al

1 
1,477 
is the principle how an aircraft move ahead in ground similar to how a spacecraft moves ahead in empty space?
in...

Apr110 05:08 AM
rajeshmarndi

7 
1,087 
Hi
The way my teacher has defined coherency between two waves is that their mutual phase difference ∆ must be...

Apr110 02:20 PM
Cthugha

6 
2,306 
How to use a function f to describe the shape of water surface when a tiny object is floating on it based on surface...

Apr110 08:11 AM
xyd

2 
1,674 
I'm trying to simulate the force experienced by a currentcarrying wire under the influence of a magnetic field. I...

Mar3110 12:30 PM
diemilio

0 
1,209 
All 
With a meter stick standing straight up and pivoted at the *bottom*, what is
the final angular velocity as...

Mar3110 11:19 PM
rock.freak667

1 
678 
The diagram shows a straight wire carrying a flow of electrons out of the page. The wire is between the poles of the...

Apr210 03:09 AM
bjacoby

1 
4,434 
Hello All,
I am going to be conducting a basic physics experiment where a magnet, which can slide up and down a...

Apr110 05:30 PM
Jdo300

0 
616 
I'm trying to model two cylindrical magnets (NdFeB, Grade N42) in Comsol. I'm obtaining the force and torques exerted...

Apr210 09:17 AM
trobriand

0 
2,847 
If you have a 3 dimensional perfectly conducting body the conditions at the boundary for the EM field is as follows:
...

Apr210 10:42 AM
clem

1 
612 