Sally Sue, an enthusiastic physics student enjoyed the opportunity to collect data from standing waves
in a spring. She and her partner held the ends of their spring 4.00 meters apart. There were 5 nodes
in the standing wave produced. Sally moved her hand from the rest position back and forth along the
floor 20 times in 4.00 s. Sketch the situation and determine the following:

a. the wavelength of the wave Sally Sue sent

b. the frequency of the wave produced

c. the speed of the wave

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