Which of these is NOT true of periodic waves? A:A. Periodic waves move in a regular way.
B:B. Periodic waves do not have a distinct pattern.
C:C. Periodic waves repeat within a certain amount of time.
D:D. Periodic waves have a pattern of movement that repeats.

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.