Recent content by en.yokhai

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    Calculating Energy for Full Sphere of Radius R

    electric field, so the mass is not important...the charge is,namely the density
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    Calculating Energy for Full Sphere of Radius R

    Homework Statement hello the question is : what is the energy needed to build a full sphere, radii R, and with density a*r The Attempt at a Solution i did it this way, i assum that i have a little ball radii r, and i want to bring an intificimal sphere width dr, and use W=Kq1dq2\r...
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    Can You Calculate Capacitance for Each Half of a Cylinder Capacitor Separately?

    hey i have 2 cylinders one with r1 the second with r2. r2>r1, an cylinder capacitor. in the space between them i put 2 dielectric materials, the first in a half of the cylinder, vertical,and the second on the other side vertical. like: first- 0-180 deg second- 180-360 deg...
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    Calculate the electric field in the middle of half sphere

    i'm talking about a shell
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    Calculate the electric field in the middle of half sphere

    \sigma\2\epsilon sigma dividd by 2 epsilon
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    Calculate the electric field in the middle of half sphere

    hey guys i'm new here...i got here with a question... i want to calculate the electric field in the middle of half sphere with raduse R , so..i made a rings out of the sphere,ds,which in fact is (2PI*R^2)sin(teta)d(teta), and tried to integrate from 0 to PI/2. i did get something...i'd...