Trouble with Conservation of Energy And Friction
Ok, I'm driving myself mad, so if someone could settle this for me, that would be helpful. So, I'm imagining something like a hockey puck going across ice and coming to a stop. I'm trying to account...
View Articlewhy do inductors shift current by the same amount?
when R=0 and there is only the inductive impedance, what's the angle?
View Articleelectric field of a sphere
hi guys, i have been following griffith's book on electrodynamics and i m stuck with probably one of the basic concepts on electric field. i did not understand what would be the electric field, 1)...
View ArticleWhat does it mean to be ''in series'' or ''in parallel''
Hello, I've had a qualm over the definition of ''in series'' or ''in parallel''. I want to know, when two components are in series, does that mean that they share the same current, or does it mean that...
View ArticleThermodynamic PV-diagram: Why does a critical point =inflection point?
http://en.wikipedia.org/wiki/Critica...rmodynamics%29 Look here please. Why is the first and 2nd order derivatives of pressure with regards to volume equal zero at the critical point for an isotherm...
View Articledoes non-sinusoidal electric/magnetic fields generate EM waves
why all EM waves are sinusoidal ? or this is not true at all, i.e., EM waves of other waveforms do exist ? the above 2 questions are among the most vague in classical EM theory, of which i studied many...
View ArticleConfusion On Electric Field Inside Capacitors
When deriving capacity of a parallel plate capacitor, we consider the electric field (sigma/epsilon), i.e. the field due to one of the plates while both the plates are charged with Q and -Q...
View Articleradio waves emitted by an inductively coupled power transfer system
I would like to know if a a inductively coupled power transfer system also emits electromagnetiv waves. The system contains of two inductance coils one generating the magnetic field with AC, the other...
View ArticleCollision between gas molecules with liquid molecules
What happens when a gas molecule collides with a liquid molecule at the microscopic level ?
View ArticleProduction of 1 Tesla Field for Penning Trap?
Hi, I'm a 2nd year undergraduate student at The University of Liverpool. I'm part of a team looking to create a novel Penning trap for a project. The short run down is that my team and myself have...
View ArticleA coin will land on its edge?
I've have just registered here in order to post this question. I know it's a good idea to read a forum for weeks and months (years!) before daring to post, in case a question has already been discussed...
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Heat, Work , etc.
1) I don't completely understands Charles Law (V = T*k) - This implies that if we increase the volume of an object, it's temperature will rise! Imagine a piston-apparatus - If we push the piston up,...
View ArticleEnergy and proper time (not relativity)
Hi guys, In a scientific paper, I have found the following sentence: "...given the fact that the system is homogeneous in energy, or equivalently, that it has no proper time scale." I'm not sure about...
View ArticleActive and Passive rotations
Hi This is the problem... I'm reading a paper where the author says Transformation between the laboratory and spherical frames can be represented by the product of two rotations through the angles θ...
View ArticleCollapse in gravitaion field
Hi, I've know that accelerated charge generates electromagnetic radiation which eventually should cause the electron to crash in to the atom nuclear, until Bohr atom model. Suppose that we have a mass...
View ArticleMisunderstanding of Energy
Hey, I know I'm wrong, but I don't know where. I've read several textbooks and searched the web, I would appreciate if you could explain my mistake: When two atoms collide with each other, they would...
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Difference between Gaussian and Airy
What is the difference between a Gaussian beam profile and an Airy disk? Both seem to be pretty much the same to me. An Airy disk looks like this: And a Gaussian beam profile looks like this: So they...
View Articlecaratheodory's formulation of thermodynamics, Rejected?
I was trying to find some papers on caratheodory's formulation of thermodynamics and This paper is one of the things I found. I wanna know is there any respond to this paper till now?Should we say the...
View ArticleHelp understanding the electromagnetic radiation; mainly near field.
I have a solid foundational understanding of far field electromagnetic radiation i.e., two in phase electric and magnetic fields oscilating perpendicular to each other and to the direction of wave...
View ArticleDensity of a Spring
Here is the following excersise one teacher posed as a challenge to solve: A spring has one side attached to the wall and the other one free.The spring has at rest length L, and linear mass density...
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