(a) a phonograph record carries a uniform density of "static electricity" σ. if it rotates at angular velocity ω, what is the surface current density k at a distance r from the center? (b) a uniformly charged solid sphere, of radius r and total charge q, is centered at the origin and spinning at a constant angular velocity ω about the z axis. find the current density j at any point (r, θ, φ) within the sphere.

Iread this book last year so take this with a grain of salt.gene jumps from the tree to compete with finny due to the fact that gene is always trying to do better than finny. he is put under the grasp of peer pressure due to finny almost forcing him to do this. ever since he first jumped finny kept pressuring him to jump since he thought gene enjoyed jumping.rather than uses this answer you should probably just reread chapters 3-4

Wind or electric energy force force of friction