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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
41,736 
I know this is a programming language question, but no one seems to answer in that Forum. I'm running a program in...

Dec1104 01:29 AM
starbaj12

0 
857 
What's the hypostasis of wave?
(newlycome,thanks for your reply :smile: )

Jun1805 11:49 AM
jdavel

1 
857 
Hi All,
For a hydrogen atom in the field B, torque on the electron is \tau =\mu Bsin\theta =\omega_pJsin\theta =>...

Sep1911 08:36 PM
clem

1 
857 
How can i mathematically prove the following equation:
I have to prove that the minimum speed required to maintain...

Oct1604 09:36 AM
decamij

2 
856 
My physics book says that the magnetic field is caused by moving electrical charges, acts only on charges with a...

Apr2309 05:43 PM
Bob S

7 
856 
When calculating the degrees of freedom for a particular molecule, how do you know which degrees will be frozen out at...

Mar410 05:05 AM
Identity

0 
856 
Two magnet I put nearer to each other in such a way that there is a repulsive force between them. Both the magnets...

Mar1710 02:29 AM
suhagsindur

6 
856 
Hi there,
If you have a stream of protons passing through the inside of a coil of wire (coils of wire at 45 degrees...

Dec2110 06:01 PM
Northprairieman

4 
856 
Fairly straight forward question. If you have a set of three vectors specifying a frame of reference and a second set...

May711 01:18 PM
muonnoum

2 
856 
Hi,
I am reading a fluid dynamics paper about dissipation due to turbulence in the fluid causing "Bernoulli loss"....

Jan1612 06:35 PM
boneh3ad

1 
856 
Consider a bearing joint together with a long pipe (with radius a) by using shrinkfitting. The grip between the pipe...

Jan3012 03:43 PM
Arcturus82

0 
856 
This is not a perpetual motion machine; the fusion power plant will run out of nuclear power to provide electricity to...

Feb2112 07:45 PM
berkeman

2 
856 
dE = dQ + dW = dQrev + dWrev = dQirev + dWirev.
We have for an reversible process, dQrev = TdS and dWrev = PdV....

May912 05:27 PM
nonequilibrium

7 
856 
I shoot a bullet of mass m with velocity v against a block of mass M.
Find how far the bullet penetrates the block....

Oct2412 12:56 PM
CrazyNeutrino

6 
856 
dear friends,
i have one problem regarding the inertial frames.it is said that freely falling elevator satisfies the...

Nov1704 02:29 PM
heman

1 
855 
As part of a local competition, i have to calculate the distance that a projectile launched at an angle from a certain...

Mar1508 09:06 AM
naes213

3 
855 
if F is any function and H is the hamiltonian, then the Poisson Bracket of F and H, is given by:
= dF/dt ...

Mar3008 04:34 PM
George Jones

2 
855 
Well i known this is a kinda fundamental property of mechanics but i always have a weird thinking about this law.
...

Feb1009 10:45 AM
rasensuriken

4 
855 
Ok so I made an observation while answering some homework questions, and I want to make sure its not just a...

Sep1410 03:59 AM
vlado_skopsko

2 
855 
Hello!
I`m looking for Lagrangian Systems with Lagrangian function containing higher derivatives in t. I would be...

Dec810 04:13 PM
Omega137

0 
855 
Can someone explain to me what are differential and derivatives used for (intergrals ?) in some well known stuff from...

Mar211 06:33 PM
ELog

4 
855 
The first Maxwell equation, Gauss' law makes a clear distinction between "inside" and "outside". But such a...

May1511 04:38 AM
Rocky Raccoon

5 
855 
Is there any printing technology that can print small enough parallel lines on, say a glass or clear plastic...

Jun1111 12:53 PM
arydberg

4 
855 
For retarded scalar potential of arbigtrary source around origin:
V(\vec r, t) = \frac 1 {4\pi\epsilon_0}\int \frac...

Jun2911 11:53 AM
yungman

3 
855 
Can anyone tell me the definition of a "Nyquist" with respect to units of frequency? I didn't find it defined on the...

Mar2912 08:34 AM
AlephZero

3 
855 
Hallo everyone!
I'd like more about the energy in the magnetic fields of a magnet is there major amounts of energy?...

Apr2612 04:57 PM
mfb

2 
855 
I am quite confused about this area.
First entropy does not contain any reference to volume. So if we can...

Jan713 11:27 AM
Rap

9 
855 
Hello all,
I have a quick, albeit probably ignorant (forgive me) question generated by (bu dum) observations of a...

Apr1913 03:33 PM
tomcat017

4 
855 
Because of the kinetic energy and frames of reference thread:
http://www.physicsforums.com/showthread.php?t=534883...

Sep3011 09:01 PM
rcgldr

0 
854 
Hi all,
I am trying to find two figures which contain the following:
 The first one would be two skaters...

Feb209 12:59 AM
Dominique

0 
854 
Speed = distance/time and current = charge/time. Explain how F=BIl is actually the same equation as F= Bqv but...

Aug3109 09:56 PM
Born2bwire

4 
854 
In the context of the book " Black Holes, White Dwarfs, and Neutron Stars", the author wrote down P = 1/3 int(p v...

Feb511 07:41 PM
rbwang1225

0 
854 
Dear Colleagues,
I would like to submit to your court the article in which we attempt a physical analysis of living...

Mar2311 09:23 AM
Vladimir Matveev

2 
854 
Hi everyone!
Here's my problem of the day:
Let's take a box containing 3 identical (but distinguishable)...

Jul311 02:33 PM
teddd

1 
854 
Hi everybody,
some time ago our teacher has shown us the following example from the theory of elasticity:
...

May1012 06:06 PM
Jano L.

6 
854 
When the electromagnetic wave propagates in air and it meets the object with the size less than the wavelength then...

Nov712 07:32 AM
Andy Resnick

9 
854 
Is there any way to deduce pascal law from newton's laws?
Another question: in a hydraulic press, with the smaller...

Jun2012 03:18 PM
luis20

2 
854 
Is it because for there to be work there must be heat entering the system, which is what is really causing the...

Oct1512 11:06 AM
raopeng

4 
854 
For ideal gas , can I assume Cv dT = nkT (3/2)
, thank you

Dec2912 03:41 AM
Outrageous

2 
854 
I took a thermodynamics course last year and I know which topics confused me (fugacity for example) but I'm curious...

Feb2113 05:57 PM
0xDEADBEEF

9 
854 