Tension in strings
I am trying to self learn kinematics , but i don't understand a certain concept :- If a string hold a mass which in turn holds another mass by a string. by F.B.D to in forming the first equation , we...
View ArticleWhat is a space/spatail harmonic?
Hi I am doing a project on folded waveguides and I am reading some IEEE papers for literature review. I always come across this term "space harmonic" and fail to understand what it is. I have checked...
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Poisson bracets - exam soon
Okay there is a particular equation in my book, which I just can't seem to understand intuitively. I've been staring at it for an hour now without progress, so I hope some of you can explain it....
View ArticleFaraday cage in a parallel plate capacitor
Hi, A parallel plate capacitor is charged from fixed voltage, after I cut voltage source. Now, what's happened if I place a Faraday cage inside capacitor (without touch capacitor) ? Capacity changed ?...
View ArticleConservation of energy in case of rotating falling rod
Suppose we have a rod standing vertically and then slightly disturbed so it begins to fall. After it falls through some height or angle assuming a clockwise rotational fall I can see that the left end...
View ArticleMagnetic dipole interaction
Two permanent magnets are on the table some distance apart and having some arbitrary orientation relative to each other. When we let go of them they will rotate and translate until they stick together....
View ArticleChange of the "Del" operator in two particle interactions
Ok,so John Taylor's Classical Mechanics has this small subtopic "energy interactions between 2 particles".And,in that,hes defined a "del1" operator as the vector differential operator with respect to...
View ArticleQuestions about the electric field in an air/ionic media interface
Hi there. I'm trying to consider a system in which you have an electric field applied by a capacitor over two media, namely an air gap and then a solution containing a bivalent ionic concentration....
View ArticleBike/motorcycle leaning in a curve. What happens to the normal force N?
Hello Forum, If a bike is negotiation a curve, the static friction force will supply the centripetal force F_c. If we go too fast and the friction is not enough we skid along the tangent. There are two...
View ArticleQuestion about the fundamental equation of thermodynamics
In a PVT system, knowing the function U(S,V) (or S(U,V) ) allows us to know all the information about the system, so it's called the fundamental equation of thermodynamics (and it makes sense to me...
View Articlezero gravitation!!! is it possible
1. Can you tell me the name of two particles having zero force of gravitation between them ?
View ArticleDirection of friction
1. Pls tell me the direction of friction on the rear wheel of a cycle moving down on an incline plane in both the cases that are when cycle is being paddled and without any paddling ?
View ArticleThermodynamics
In thermodynamics, can give any example in industry that is involving the first law ,second law ,entropy ,third law ,compressibility,expansibility,I just want to know what is the point for me to study...
View Articlelimit to the amountof heat contained in a rod??
Hi. I just wanted to know is there any limit to the amount of heat energy that a body can store in itself? For example, we have a rod of copper and one of its end is in contact with a source of heat...
View ArticleG-force equation confusion
Hi. Can you clarify for me the equation for g-force below: F= ma + mg I got this equation from my lecturer. He asked the class to determine how was the formula above formulated. But this is not a...
View ArticleIf you touch a live wire without touching the ground, do you get an electric...
It is ussually thought that if you receive a shock touching only one cable is because you are not well isolated from ground. In theory, if you touch only one wire in one point and you are not conected...
View ArticleEuler-Lagrange Equations with constraint depend on 2nd derivative?
I am reading the book of Neuenschwander about Noether's Theorem. He explains the Euler-Lagrange equations by starting with [tex]J=\int_a^b L(t,x^\mu,\dot x^\mu) dt[/tex] From this he derives the...
View Articleestimating potential drops within multi-media capacitors
I was wondering if anyone had any insights on how to estimate or discern the potential drops across a capacitor containing three distinct media between the electrode plates. The system is as follows...
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Edwards-Anderson Hamiltonian of a Hopf link
Hi, I was calculating the Edwards-Anderson Hamiltonian of a Hopf link. A hopf link is like attachment 1. I have drawn the Seifert surface of that link. The surface is shown in attachment 2. It also...
View Articledetails of research on using electricty from Lightening of the sky
is it possible to harness the lightening to get electricity.
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