Why is a scientific theory the most powerful explanation scientists have to offer? a)many different scientists have added data from their own experiments to build the theory. b)a theory is the same things as a hypothesis. c)scientific theories are usually the work of a single scientist. d)technology is used to provide the experimental data for a scientific theory.

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c