With the water trap being used, all the possible sources of error would be eliminated. True
False

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

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.

In which of these cases are the two wave points considered to be in phase with each other?