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Again, for some odd reason, people...

Apr2211 05:26 AM
ZapperZ

1 
46,927 
Hello all. I'm a newer engineer in rotor dynamics trying to better understand some things, so perhaps someone can...

Oct1512 11:54 AM
mfb

6 
1,515 
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 
893 
Hello
I wrote a simple simulation of an 2D ideal gas, with elastic collisions. I wonder how should I simulate the...

Oct1512 06:31 AM
mikeph

3 
857 
Title says it all, confused as to how I'm supposed to define the phase space of a system, in my lecture notes I have...

Oct1512 12:17 AM
capandbells

4 
1,008 
Hi, I am working on an example that demonstrates Newtons laws in 3dimensions (this is NOT homework). In my example I...

Oct1412 04:49 PM
Vanadium 50

1 
740 
Hello, if I put two plates one in front of the other and apply a voltage I read that an electric field creates, but...

Oct1412 04:18 PM
scientifico

3 
685 
I'm a bit confused about the effect of the size of ferromagnetic material on the magnetic field it generates so I was...

Oct1412 04:04 PM
Per Oni

2 
686 
Hi all,
I am brand new here and need some help  i hope it is the right category i am posting in.
I am no...

Oct1412 12:25 PM
haruspex

5 
1,454 
So I just wanted to clarify:
Because D = ε0E + P
P being zero in vacuum
and ∇D is constant regardless of...

Oct1412 12:08 PM
Danen

2 
548 
Hi! I have attached the picture. Can someone please tell me what equation of motion will be?
My guess is that it will...

Oct1312 05:43 PM
mfb

3 
585 
Hi!
The damped oscillator equation is as follows:
x(t)= A exp(γt/2) cos(ωt)
where ω= √( (w0)^2 + (γ^2)/4 )
I...

Oct1312 12:25 PM
Philip Wood

6 
633 
Consider a simple two particle system with two point masses of mass m at x1 and x2 with a potential energy relative to...

Oct1312 11:16 AM
mfb

6 
891 
In a heat transfer with internal heat generation what does the term "internal heat generation" mean?
Is that...

Oct1312 10:07 AM
Chestermiller

3 
1,376 
Hi,
I'm writing a small studentpaper on heat pumps, and I'm not at the point where i explain the physics behind...

Oct1312 09:50 AM
andrien

1 
2,406 
I'm investigating the phenomenon of sonoluminescence. A quick search has yielded the RayleighPlesset equation as...

Oct1312 09:46 AM
Ashiataka

2 
710 
Do you know some example of an operator, other than momentum or position, that has (at least partially) continuous...

Oct1312 09:16 AM
Jano L.

3 
697 
The heat equation predicts that heat spreads infinitely far over arbitrarily small time intervals. What happens in...

Oct1312 09:04 AM
espen180

1 
826 
Last semester I did a project for grade 12 physics where I had to account for air resistance in projectile motion. I...

Oct1312 06:09 AM
mfb

3 
1,168 
Hi there,
I'm trying to create a sheet that produces a uniform magnetic field,using either rectangular or...

Oct1312 05:17 AM
Qreeus

4 
817 
The function for simple harmonic oscillation is:
Acos(ωT)+\phi
Why is there an angle phi added to the function...

Oct1212 10:09 PM
CrazyNeutrino

8 
2,169 
Not sure if this should be in quantum section, please move if necessary.
We know that:
1. A stationary particle...

Oct1212 05:17 PM
Jano L.

2 
1,091 
I have a small pump system for an aquarium, and have decided to build a small manifold. The total volume of the...

Oct1212 01:23 PM
jakestenson

3 
1,049 
In a Faraday flashlight, a magnet is shaken to and fro in a solenoid to induce an EMF and thus current. Something like...

Oct1212 12:19 PM
Qreeus

5 
1,330 
we set limits by what we can measure; therefore, it is what we have. This is my general understanding. I think it...

Oct1212 08:09 AM
Qreeus

16 
2,412 
This is a simple enough question, but no one has been able to give me a satisfying explanation. Most people compare...

Oct1212 05:51 AM
CWatters

25 
10,281 
When people talk about sunspots and the solar cycle and stuff like that, they often mention magnetic field lines...

Oct1212 05:16 AM
Qreeus

3 
976 
I was wondering, after discovering that in particular scenarios atoms can release photons, how they do it? Is some of...

Oct1212 04:26 AM
Drakkith

6 
1,226 
I am very confused with a particular aspect of part of my physics curriculum.
Let's say there is an object swinging...

Oct1212 02:46 AM
Simon Bridge

1 
1,312 
I was wondering that since most forms of energy can either be in wave or particle form, (example; photons and...

Oct1212 12:26 AM
Drakkith

5 
1,044 
entropy = jouls/kelvin
supose 1 liter of ideal gas is allowed to freely expand into a 2 liter volume in an isolated...

Oct1212 12:11 AM
Andrew Mason

1 
915 
Will any one help me to understand the concept of reduced mass , where does it come from and its physical significance

Oct1112 08:42 PM
Simon Bridge

4 
911 
I was reading a book on wave and found that when they derive the equation of shm from the equation force varies with...

Oct1112 08:10 PM
Shan K

7 
979 
If an isolated body starts to accelerate, why would saying the system isn't properly isolated render Newton's second...

Oct1112 07:55 PM
autodidude

2 
621 
I am a bit confused about gravitational potential energy near the earth, namely the formula given by mgh.
I know...

Oct1112 06:52 PM
Simon Bridge

17 
1,379 
I was wondering if my measurements book that states there are 9,460,000 km in a lightyear is correct. I raise this...

Oct1112 06:46 PM
Drakkith

7 
822 
http://www.icarusengineering.com/DynamicSoaringandSE.htm
http://www.youtube.com/watch?v=wHPjxf4q91Q
I am...

Oct1112 03:23 PM
A.T.

23 
2,762 
In Jackson Classical Electrodynamics (P. 498)
Eqs 10.130 and 10.132, which describes waves from a conducting sphere...

Oct1112 01:47 PM
rays

0 
537 
Walter Lewin at MIT says that at a point of stable potential energy(like the troughs of a wavy surface), d^2u/dx^2...

Oct1112 12:53 PM
CrazyNeutrino

0 
390 
Hey guys,
I am trying to conceptualize as to why shear stress in a vessel is highest at the wall of the vessel and...

Oct1112 12:47 PM
Chestermiller

7 
1,073 
If the wheels and tires of a car are rolling without slipping or sliding when turning, the bottom of the tire is rest...

Oct1112 11:21 AM
A.T.

7 
1,433 