The volume charge density of a solid nonconducting sphere of radius R=5.60cm varies with radial distance r as given by ρ=(14.1pC/m
3
)r/R. (a) What is the sphere’s total charge? What is the
field magnitude E at (b) r=0, (c)r=R/2.00, and (d) r=R? (e) Graph E versus r.