1. My grass is dying, and I believe it's because it is not getting enough water. Sol decide to conduct an experiment by watering the backyard everyday for two
weeks, while leaving my front yard alone. After two weeks I measure the length
of my grass to determine which grew better. What variable(s) should be
controlled?
Amount of sunlight
Temperature
Type of grass
All of the above

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