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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
46,903 
I posted this in the College Level Help forum, but no one responded. I really need some explanation on this, so I'm...

Feb1610 05:12 PM
Seduction

15 
2,339 
Is it possible to have an INCREASING speed AND have the MAGNITUDE of acceleration decreasing????
If so please give...

Feb1610 01:34 PM
Bob S

19 
3,871 
Why is the total energy of an elliptical orbit given by:
E_{tot}=\frac{GMm}{2a}
Where a=semi major axis.
I agree...

Feb1810 06:52 PM
shnav34

5 
5,912 
Does anybody have any tips/ advice on building a simple cyclotron? I read about Michio Kaku making an accelorater when...

Feb1710 07:45 AM
ephedyn

6 
6,796 
i am confused about the exact forces in play while we walk and while a car is driven, can anybody plz show me a free...

Feb1510 11:30 PM
troy611

3 
1,977 
How does the electromagnetic waves store information, what makes these waves to store. (this may be a stupid question...

Feb1710 07:17 AM
physixlover

4 
1,638 
I am trying to calculate the theoretical induced emf of a hand crank generator I am going to make. The generator will...

Feb1510 09:16 PM
Xyius

1 
1,729 
I'm wondering if it make much difference if they used silver instead of copper wire in electric generators? Also, how...

Feb1810 09:25 AM
GRDixon

4 
771 
What is the explanation behind this law? I've read tons of definitions for it and I still can't understand it. Will...

Feb1510 08:04 AM
ZapperZ

8 
1,383 
from the second law of newton we know... applied force is proportional to the change of momentum...that means F= k(...

Feb1610 01:41 PM
saunderson

2 
2,025 
Hi,
I'm trying to find a way to calculate the resting position of a network of springs that is built as follows: n...

Feb1510 07:30 PM
o_z

3 
3,163 
Galileo is said to have reasoned that all masses must fall with the same acceleration despite their differing weights...

Feb1710 09:23 AM
TurtleMeister

19 
5,835 
In studying the world, physicists found that, in order to completely understand what today we call "Electromagnetism",...

Feb1610 12:52 PM
Bob S

14 
1,237 
Hi All,
The classical theory of a bar magnet as I understand it is that there are many current loops at the atomic...

Feb1510 08:35 PM
Wannabeagenius

2 
1,104 
hi
I have a plate moving back and forth in a closed space. The shape of the plate is a ring, it is moving around an...

Feb1610 02:39 PM
appelboom

6 
1,163 
In some papers and text, it is said that the central spot radius of the Bessel beam (take zeroth order J_0(\alpha...

Feb1510 08:04 PM
KFC

0 
2,011 
The magnetic field surrounding a barmagnet (for example) is continuous. The lines that are drawn to depict the...

Feb1710 01:47 AM
kcdodd

3 
2,392 
I recall a physics teacher demonstrating an experiment where he transfered a droplet of oil to the surface of water...

Feb1710 01:37 AM
p.tryon

2 
1,019 
How far do you need to separate two opposite 1C charges inorder for the potential difference to be 1v?

Feb1710 02:33 AM
Born2bwire

1 
765 
Suppose we have an electrically insulated box in a room, and the potential difference between the box and the room is...

Feb1610 03:56 PM
Stonebridge

3 
2,955 
according to first law of thermodynamics,q=w for a reversible isothermal process.this means all the energy absorbed is...

Feb1810 08:24 AM
Mapes

1 
693 
Hi everyone,
I am new to the physics forum. I have been trying to find out relationship between the heat loss by a...

Feb1710 03:04 PM
bisseychor

0 
3,873 
I noticed that the relations in mechanics can be seen like:
1) assume conservation of angular momentum
2) from...

Feb1710 12:35 PM
Gerenuk

0 
501 
In electrostatic case, Gauss's law can be derived from Columb's law, so we can regard experimental evidence for...

Feb1710 12:14 PM
kof9595995

2 
2,014 
My question is seemingly simple.
Let us suppose that we had an unbreakable/inflexible rod whose length was 11.8...

Feb1810 08:11 AM
A.T.

4 
1,128 
I know for spherical or plane EM wave, there's relation E=cB, and we can prove it by the explicit expression of these...

Feb1810 01:19 PM
kof9595995

5 
7,730 
F=ma and w=mg; with acceleration = gravity, then Force = weight.
lb is a mass
lbf is a force
kg is a mass
I...

Feb1710 04:41 PM
D H

13 
2,022 
Given: a point charge (at rest at the Origin at time t=0) with a constant acceleration in the +x direction. ...

Feb1810 09:42 AM
GRDixon

1 
659 
Hi,
I am trying to model the magnetic field from two permanent magnets using Matlab, although my particular problem...

Feb1710 02:19 PM
stephenx_86

0 
1,518 
I am an ME with my years of heat transfer approx. 20 years back. I have a 3' x 7' insulated sub floor that utilizes an...

Feb1710 02:44 PM
sdlamb100

1 
628 
Hi, if the shear stress on an element in a solid is SAy/bI, where S is the shear force and y is the distance from the...

Feb1810 09:40 AM
milan666

7 
3,649 
Hi
Are the two (attached) circuits equivalent?
Also, what if any are the relation between the voltages? (ie....

Feb1710 05:04 PM
saunderson

1 
679 
Edit: Apparently Coulomb's law only holds for electrostatics... in that case I understand that this problem is...

Feb1710 07:12 PM
torquil

1 
949 
In some books I have seen:
\oint \mathbf{E} \cdot d\mathbf{s}=0
Since the Electric Field is meant to be...

Feb1710 09:32 PM
elect_eng

3 
632 
Dear Forumers,
As a nonEnglish speaker, I am confused about absorbance and absorptance. I found some definitions...

Feb1810 03:06 AM
Telmerk,the Magician

0 
1,754 
I was trying to study a way of estimating the capacitance of a capacitor in a kelvin water dropper experiment. Is...

Feb1810 03:49 AM
Mola

0 
2,884 
Hi,
Would appreciate any help anyone has for me.
I am building a physical pendulum of sort, which consists of a...

Feb1810 06:55 AM
I_am_learning

2 
1,977 
Hi,
I'm making laminar fluid flow devices and want to be able to calculate the velocity as a function of distance...

Feb1810 07:02 AM
stephenx_86

0 
10,672 
Edit: Solved.

Feb1810 08:51 PM
dabananana

2 
1,281 
A comet is in an elliptical orbit around the Sun. Its closest approach to the Sun is a distance of 5e10 m (inside the...

Feb1810 07:09 PM
shnav34

2 
1,151 