Converting Linear Accelerator To Circular One
Hi guys , Suppose there is a circular accelerator has the same inner structure of a linear accelerator in terms of the rings of acceleration ... The angular frequency of accelerated particles is : ω =...
View ArticleForce of Friction
I am having a little trouble understanding the force of friction. It is given by the formula Ff = [itex]\mu[/itex]FN Now taking a mass on an inclined plane with angle θ into consideration, I want to...
View ArticleIS it possible to have total bound current NOT equal to 0?
I have a permanent magnetization [itex]\vec{M}[/itex]=(ks)[itex]\hat{z}[/itex], k is just a const, s is the cylindrical coor. Then it turns out that the total bound current not equal to 0. i wonder is...
View Articlecoaxial cables and displacement current
Hi All, Consider a situation in which a coaxial cable have electric current i(t) = Imax * cos(w*t) flowing through its cilindrical inner cylindrical core (with radius a) and the inverse current flowing...
View ArticleSending polarerized light through light fiber that is all jumbled up.
Say we have laser light propagating in the +z direction and polarized in the x direction that then enters a fiber optic cable. Let the fiber optic cable, of some length, be quite jumbled up so that the...
View ArticleWork Energy Theorem and Potential Energy violation?
I came across a rather confusing topic about Work Energy Theorem and Potential Energy applied in lifting a particle.I will be glad if anyone clears it for me. Consider a particle at a height...
View ArticleCompass Needles
I was wondering that if a compass was left on a horizontal angle for billions of years, would the north and South Pole needles eventually rip apart due to the north needle being repelled from the south...
View ArticleMechanics behind capillary depression.
As the question states I have hard time understanding that how does a liquid reach equilibrium in case of capillary depression (mercury for example ). I know how it goes down but not how it 'stops'....
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Telescope Resolving Power Limits
Is it possible for a telescope to resolve images beyond the diffraction limit? In other words, is the information in the light entering a telescope insufficient to resolve beyond the diffraction limit,...
View ArticleMomentum of an arrow or a sword thrust?
Can someone tell me what generates more momentum, an arrow fired from a yew long bow at its peak strength or a sword thrust from a longsword and rapier too at its strongest? Thank you.
View ArticleTemperature of iron and wood
If I put an iron of 350K and a wood of 300K in contact, then put them in a container so that they are adiabatic. The question : after a very long time will they become thermal equilibrium? same...
View ArticleAcceleration of a curved trajectory
Feynman_Lectures_on_Physics_Volume_1_Chapter_11 In paragraph 11-6 he says that the tangent acceleration is the change of speed v but if I look at fig. 11-8 the change in speed is slightly smaller than...
View ArticleConceptual Explanation of Gauss' Law?
I'm trying to explain Gauss' Law to a bunch of high school kids. They wanna know why the total electric flux through a closed surface does not depend on the shape and volume of the closed surface and...
View Articlewhat is the exact meaning of mean field approximation works above a critical...
what does it means exactly? take the d-dimensional ising model as an example suppose d>d_c does it mean that the critical temperature is correctly captured by the mean field theory? or does it just...
View ArticleEquation of state
I know Pv=RT, but I don't understand why my book said f(P,v,T)=0 mean? Why the function of P,v,T equals to zero? Why not equal to a constant? Thank you.
View Articlevan der Waals gas
[P + (n2a/V2)](V - nb) = nRT What is the P represent? Is the pressure of ideal gas or the pressure we can measure from the real gas? Consider now it is the pressure of ideal gas but how do we get the...
View Articlevan der Waals P-V graph
http://en.wikipedia.org/wiki/Van_der_Waals_equation (the graph of Maxwell equal area rule) When the temperature is under the critical temperature, then at certain pressure, there will be three possible...
View ArticlePhysics of weight lifting
Hello to the Forum. I just started doing some very light weight lifting and decided to do a rough calculation of how many calories I might be burning during each of my workouts, however the figure I...
View ArticleP-T graph of water
refer to http://chemwiki.ucdavis.edu/Physical...Phase_Diagrams say: This indicates that the liquid phase is more dense than the solid phase. From that graph, how do we know the density and water expand...
View ArticleWhat kind of optics are these?
I got these for a couple dollars at an electronics flea market. They look like maybe some kind of dichroic lens, but I don't know. Can anyone help identify them? Did I get a good deal for a couple...
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