(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.

colorectal cancer may also develop from areas of abnormal cells in the lining of the colon or rectum. this area of abnormal cells is called dysplasia and is more commonly seen in people with certain inflammatory diseases of the bowel such as crohn's disease or ulcerative colitis.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).

conduct current i mean it makes sense