A tennis ball moves 24 meters southward, then 16 meters northward, then 18 meters southward, and finally 28 meters
northward.

During which interval are the persons represented by the graph not moving? a) 0 to 0.5 hrs b) 1.5 to 2 hrs c) 2 to 2.5 hrs d) 4.5 to 5 hrs

At what time will the interfering waves have an amplitudeof zero?

Two waves maximally constructively interfere at a point in space. among the options below, select the possible value of their phase difference at that point in space.a. zerob. πc. π/2d. not determinable by the information provided