Recent content by captain.joco

Hey, I don't quite remember this but I'll try to explain how you do it for your first reaction. At the beginning, you can find the allowed values for L ( the orbital angular momentum ) via the angular momentum addition theorem: L = { |J1-J2|,..,|J1+J2|} in integer steps. As for the...

Hey thanks for your answer. I have thought of that, but I wouldn't like to do that manually for ~100 stars.. Isnt any ready data table of absolute magnitudes and colors out there ( at least for near by stars? ) Thanks

Hello all, I am finding a distance to a cluster via Main Sequence fitting, and I don't know where to find an absolute color - magnitude diagram ( B-V, and V ). I can be from any star cluster, or sky region, as long as the magnitudes are absolute. I need the data tables, not just a pretty...

Got it! Thanks a lot for the help!

It seemed too simple somehow... Is q the induced charge on the sphere, and E the electric field close to the sphere?? Thank you for your help

Homework Statement An uncharged solid sphere is paced in a constant external electric field E0. What is the force on the sphere? Homework Equations The Attempt at a Solution I know ( already have found ) the electric potential and electric field around the sphere. Also worked out...

Is this supposed to be solved by the method of image charges, or that is something completely different? Well the charge induced at the surface of the slab will have the same magnitude as the point charge above it. But i am not sure what that tells me about the field since the geometry of the...

Well.. you know that the collision is inelastic, so kinetic energy will not be conserved, but momentum will be. You know the masses and the velocities before the collision as well as their velocities, and you can safely assume that mass is conserved, you can use momentum conservation to find...

In my case, the energy of the electron is less then the step potential, so the marble example would apply. I could think of more examples if the potential was not infinite, but this complicate things.

Thanks, that indeed makes sense.

Homework Statement A step potential is defined by: V(x) = 0 ( for for x <0 ) and V(x) = V0 ( for x >0 ). Hence the step occurs at the origin. Suggest a real physical situation, that might correspond to this idealized problem Homework Equations None needed. The Attempt at a Solution...

But from the original equation which is emf = - dΦ/dt, so this minus cancels out with the -3 minus.. I will redo it just in case. That's for all the help, you can count this one as solved ( I understood the main idea with the z being the only thing that changes with time! ). Thanks very much

Is this anywhere near to correct?

Sorry I made a typo.. should have been A* (μIR*R/2) * 3/( v^3 * t^4 ) but then still A* (μIR*R/2) * 3/( z^3*t )

So will the emf be A* (μIR*R/2) * 3( v^3 * z^4 ) or I did it very very wrongly..