A plastic cylinder with three side openings is filled with water. When all plugs are removed, three water parabolas will stream out. The stream from the center hole has the greatest range.
References: Hetch, Chpt. 11, Fig. P81, Fig.
11.34, Fig. 11.35; Halliday and Resnick, Chpt. 15, Fig. 15-20; Fig
15-46, Prob. 75;