lagrangian of three bodies, using an exponential potential
What I know: L = T - V V = e^(x1-x2) + e^(x2-x3) for n = 3 and a mass = 1 What I believe: T = .5Ʃ (x'_i)^2 from 1 to n So lets say you have three bodys that can just be considered pints masses of 1 and...
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Photon is electromagnetic field, right?
This thread is to move this discussion away from another thread in order to talk about it in more detail, so here is a brief recapitulation of how that went to make an opening for the discussion......
View ArticlePostulates of Classical Statistical Mechanics
can someone please explain "Postulates of Classical Statistical Mechanics" , "priori probability" , "equilibrium" ..i m a post graduatation student .and in physics these chapters are seem very...
View ArticleInduced electric field
Can electric field be induced at a point near a time varying uniform magnetic field? "Near" means not the in the place where magnetic field exist. But at a point outside the field's presence.
View ArticleVelocity of a body on a slope
Hi guys new to the forum - sorry if I'm not as advanced as you lot :tongue2: I'm currently only at A Level in my adventures of Physics! (I didn't think this would fall under homework help, I apologize...
View Articlegeneralized Boltzmann dist. (insights to share)
I was reading about the thermodynamics of the free-electron gas last night, and my mind veered to fundamental concepts of statistical mechanics. I was able to reorganize my knowledge in a way that made...
View ArticleI am starting to doubt Ohm's law. I would like someone to point out why I am...
As the title states I am really doubting Ohm's law. This is why: On a breadboard I placed a white LED and a 220Ω resistor with the 9v battery all in series. The total current flowing through the...
View ArticleHelp With Conservation Of Energy Concept
Hi guys, Can someone help explain something to me. In a situation of an asteroid heading straight towards the Earth, I'm trying to understand where the energy comes and goes (using just gravitational...
View ArticleVery long solenoid ampere law paradox?
Hello I have been doing some thinking related to Ampere law and behaviour of magnetic field inside materials of different permeability. In the process, I came up with the following thought experiment:...
View ArticleVerify about the solution of wave equation of potential.
I read in the book regarding a point charge at the origin where [itex]Q(t)= \rho_{(t)}Δv'\;[/itex]. The wave eq is. [tex]\nabla^2V-\mu\epsilon\frac{\partial^2 V}{\partial t^2}= -\frac...
View ArticleSolar system scale variance
Just a thought experiment. Imagine you made scale models of the sun and the planets with the relational standard of measure being a sun the size of a basketball. Now assume that the sun and the planets...
View ArticleInduced current on a metallic ring
I've just got confused about how the induced current in a metallic ring is calculated. Consider a metallic ring (radius a, resistance R and inductance L) immersed in a oscillating magnetic field, which...
View ArticleA gravity problem i came across.
Hello! Im sure we're all familiar with the fact that energy can't be created, only changed into diffrent states. However, i've been thinking about this scenario i find rather strange: If a...
View ArticleEntropy And Energy Representation
How do I go from the entropy of a system, S(U,V,N), to its internal energy, U(S,V,N)? For instance, for an ideal classical gas, we have S=(3/2)N*R*ln(U/N) + N*R(V/N) + N*R*c where R is the Boltzmann...
View ArticleTilting a Dichroic Filter
Say you have a dichroic filter with a bandwidth of 10nm centered at 500nm, so it will pass 495nm - 505nm light through. In an optical system the light is generally focused as a cone through the filter,...
View ArticleWhat is the mass of the Earth?
This isn't for homework or anything, I was just trying to figure this out for fun. So what I tried to do to find the mass of the Earth was this: Fg=G(m1m2)/r^2...
View Articlefocal point purpose
What is a purpose of focal point in optics,especially in human eye? I don t understand,why is required to make a focal point in retina?Everywhere in articles are pictures of this problem clarified by...
View ArticleSnell's Law Visualized
An analysis of Snell's Law. I made mistakes developing this model. Is it correct now? A gallery of drawings: http://s1061.photobucket.com/albums/t463/prismgreenpb/ A crude animation:...
View ArticleForce vs velocity
a car of mass 750 kg moving vith velocity 15 km/hr on inclined paddle (θ=7.13 degrees).at distance of 36" the paddle is attached to reciprocating piston.so how i can find the force exerted by car on...
View ArticleDiscovery of electrons - How did Thomson know they were particles?
Greetings, I have been having some fun in the last couple of days by looking at the details of historically significant experiments. One such is Thomson's discovery of the electron, in which he...
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