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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
48,251 
Can somebody please shed a little light on what this formula represents in the physical world?
And how could I solve...

Apr908 03:20 PM
hslilly

4 
1,436 
it states that in a given volume V surrounded by conductors or for that matter infinity if the charge density \rho and...

Apr908 08:02 AM
pam

5 
2,049 
Hi, nice to find a physics forum. I had a quick question.
I'm a television producer and developer, primarily in...

Apr908 07:25 AM
Shooting Star

1 
1,578 
An object rolls down a smooth plane (whose angle and length are given) starting from rest. At the end of the plane it...

Apr908 05:24 AM
Hootenanny

7 
4,778 
I understand very little of aerodynamics.
Currently, my high school robotics team is designing a F1 model....

Apr808 07:32 PM
russ_watters

1 
1,663 
I started having this doubt since i saw the derivation of potential across a capacitor using this method. So.. here i...

Apr808 03:12 PM
Shooting Star

4 
1,195 
My lecturer has given me this formula for reflective diffraction
m landa = d (cos a  cos b)
where
m is...

Apr808 02:11 PM
neu

1 
1,515 
Its been 15+ years since I have done any calcs like this and am very rusty, so even just a pointer in the right...

Apr808 12:25 PM
Gordianus

1 
2,317 
From the 1st law of thermodynamics we have
dU = ∂Q+∂W
but we also know
dU = Tds  pdv ,
i am confused...

Apr808 07:48 AM
Hootenanny

1 
1,416 
For electromagnetic field we usually use the Lagrange's density
...

Apr708 08:24 AM
sweetser

44 
7,241 
Does anyone have an idea about a formula relating the refractive index of a medium
to the temperature gradient...

Apr708 01:43 AM
Relena

7 
2,124 
Anyway ... a long long time ago, my father told me a story how when he was in college, they used to heat water just by...

Apr708 12:39 AM
Shooting Star

6 
5,141 
i understand the reason and steps leading to the equation that relates acceleration in the inertial frame to...

Apr608 07:59 PM
bman!!

4 
1,466 
I raised this question in the courseware section and I got only one response. To improve the response, I am repeating...

Apr608 06:28 PM
Doc Al

1 
1,432 
I'm trying to explain to a coworker some fallacies in a thought problem he came up with that has severely confused him...

Apr608 02:56 PM
luben

9 
1,565 
hi
I'm a new poster here.the three body problem fascinates me a lot and was just wondering if there's any book out...

Apr608 09:56 AM
Jacob1983

0 
1,018 
ive just come across gauge transformations on maxwells equations, and mathematically its all pretty straightforward,...

Apr608 01:16 AM
Phrak

5 
1,487 
How does a magnetic field do work on the electrons in a wire?
If F = q v x B, the magnetic field is always...

Apr508 10:36 PM
Phrak

7 
1,855 
Hiya. I'm revising for a classical mechanics first year exam, and the lecture notes on central forces are less then...

Apr508 04:35 PM
cpfoxhunt

0 
810 
Can an electron's mass and its magnetic moment be measured in the same experiment?

Apr508 03:57 PM
David George

2 
1,150 
I would like to analyze the motion of a superball, heres what I have so far, the perpendicular(to the ground)...

Apr508 01:45 PM
SpitfireAce

0 
1,198 
As we know, the variational principle can be used as the fundamental principle of mechanics. Without knowing Newton's...

Apr408 08:18 PM
cstalg

4 
2,965 
Consider a wire, if I suddenly pass current on it. There would be an instant localized B field around the wire. Since...

Apr408 07:58 PM
enroger

4 
959 
In school yesterday I was doing a practical and when I moved a small 1.5T block magnet near a rheostat the magnet...

Apr408 05:21 PM
lugita15

1 
1,273 
Im studying for the Fundamentals of Engineering exam (coming up April 12!!) and came across this Thermodynamics...

Apr408 01:04 PM
Mapes

1 
1,110 
I wanna know if in rapid adiabatic compression of a gas, is work done by gas on surrounding (atmosphere) numerically...

Apr308 11:07 PM
zarbanx

14 
3,024 
Hi all,
One idle night a friend and I started an argument over the question:
"How much energy is imparted on to...

Apr308 06:06 PM
seycyrus

12 
9,458 
I know that as temperature increases the extension of a material under a specific load increases too, but what is the...

Apr308 12:00 PM
Andy Resnick

1 
1,208 
Hoping that someone on this forum can help me with this problem that has been stealing my sleep at night:rolleyes:
...

Apr308 11:13 AM
jacob_yukon

0 
638 
Do electrons flowing in a circuit perform work with their mass (or kinetic energy)? For example like a water flowing...

Apr208 10:44 PM
Snazzy

32 
6,952 
If you have the primary and secondary coils of a transformer next to each other, then current will induce a voltage in...

Apr208 03:13 PM
TVP45

3 
1,010 
if a system of particles is composed of n freely moving particles .is the mass of this system qual to the sum of the...

Apr208 01:41 PM
tarekkkkk

2 
902 
If you combine many small magnets together in a cube or spherical shape (say those 1.5 tesla rare earth magnets), is...

Apr208 10:03 AM
clem

4 
1,244 
I am a beginner in thermodynamics. I was going through a educational board's chapter on thermodynamics. I want to...

Apr208 08:05 AM
Andy Resnick

2 
1,087 
So, I am looking a question about adiabatic expansions and the associated entropy changed.
Why exactly is the...

Apr208 07:46 AM
Mapes

4 
1,065 
I was just wondering, since my textbook doesn't really explain it too well, what velocity is part of the equation F =...

Apr208 02:16 AM
Feldoh

13 
2,096 
When dealing with system containing millions of particles( for example, charged particles or magnetic particles) with...

Apr108 07:36 PM
pam

1 
1,037 
Hi there,
I'm working on some experiments regarding to gases. I want to know what'd happen to gas which is uneder...

Apr108 04:16 PM
russ_watters

9 
2,826 
The flux rule states that the emf induced in any loop is given by the rate of change of magnetic flux through that...

Apr108 03:00 PM
lugita15

4 
2,167 
Hi!
Can some one give me a link where i can find details about finding the velocity of propagation of a mechanical...

Apr108 12:17 PM
Andy Resnick

1 
2,370 