Indie is essentially right. I happen to have fixed the back wall of the garage that a relative of mine drove into. All kinds of damage ensued. The wall is a gypsum board attached by screws to vertical studs. The studs are attached at the top and the bottom to the top plate and bottom plate...
Yes, it is a schol-related question asked of me by a high-school teacher with regard to a student project. I wonder whether there is anything I am not seeing that would upset what seems like a logical thread of thought. I can't see Lenz's law operating here. Thank you for your interest.
I think that nothing will happen. The steel rod is inserted into a field-free region, and the rod itself is unmagnetized. Had it been magnetized, it would have induced currents in the copper pipe that would have produced a magnetic field opposing the motion of the steel rod. However, the steel...
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The situation is as follows: Current I flows along the axis of the copper pipe. From Ampere's law, the magnetic field inside the pipe is zero and is equal to μ0*I/(2π*r) outside the pipe. Now, an...
The kq/r^2 is the field of a POINT charge. Here, we have an infinite sheet of charge composed of infinite number of point charges. The further you are above the plane (z) the more of the charges come into play (actually, the number grows like r^2, which is why the field stays constant =...
I just had a colleague use his own package to successfully diagonalize one of the matrices DEVCCG has problems with. He did it without any problems. Since DEVCCG diagonalizes most everything I have thrown at it (meaning that there are not formatting issues, etc.), it must be that there are...
A STATIONARY particle at the given point will move in the direction of the field, but if it is already MOVING, then the force field will DEFLECT (accelerate) the particle in the direction of the field lines. In the extreme case of a very fast moving particle, the motion of the particle will be...
Thank you, Dr. Courtney for responding to my question, for your help, and for your perceptive question. Since posting my question, I have come up with an answer. It turns out that general complex matrices are not always diagonalizable; in those cases they are called defective. This is certain...
Under some circumstances, whenever I call DEVCCG to diagonalize a general complex matrix, the program gets stuck inside and never returns. I do not even get out an error code so that I may continue with the rest of the program. I assume the iterative diagonalization inside the procedure does not...
I need a simple mental physical picture of interface roughness. If the auto-correlation function of surface roughness is Gaussian, does a long correlation length connote a smooth surface or not? I do not seem to be able to find a simple picture that would appeal to me physically. Thanks all for...