A rubber band has an un-stretched length of 0.10 m. If someone picks up a paper clip that has a mass of 10 grams and pulls back on it with a rubber band to a distance of 0.25 meters. With what speed would the paper clip be launched at if it is launched horizontally7 The spring constant of the rubber band is 15 N/m.

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