Recent content by lena_2509

Consider a plate capacitor with a dielectric interface (\epsilon = \epsilon_0*\epsilon_r, thickness=d) tilted at the angle \alpha . Outside the interface \epsilon = \epsilon_0. Without dielectric interface is the field \vec{E}=E_0*\vec{e_z}. Determine the E-field inside and outside the...

okay thank you ! maybe I thought too complicated ... thanks a lot !

thank you ! I know that the moment of inertia of a disc is the moment of inertia as a cylinder but how do i discribe the rotation of the disc when it spins on a shaft at an angle alpha? The shaft of the spinning top would rotate on the coat of a cone i guess...

yeah I did it before but my problem is that I don't know how to describe the x y and z values to put them in the moment of inertia I used the definition below for I and put in the spherical coordinates

I hope you guys can help me with this problem.. A top in the form of a flat, circular disc spins on a shaft that is inclined at an angle alpha to the vertical. Now I have to find the moment of inertia I for the disc about its centre on the shaft. My attempt was building I with spherical...