Suppose a cannonball is launched off the top of a 44.1m cliff horizontally as shown in the picture. the cannonball gives out a reading telling you that the was launched in the horizontally direction with a velocity of 15m/s. you also time how long the ball is in the air and it is in the air for exactly 3 seconds. how far from the cliff does the ball land?

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

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.

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of