cee4324-5984-f11hw3-solutions

cee4324-5984-f11hw3-solutions - M rectangle y =8 ft = 671...

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CEE 4324/5984: Open Channel Flow Fall 2011 Homework #3 – Solutions Problem 1: Part a: The requested graph is shown at right with the indicated values of q corresponding to the curve to the immediate left of the text. Part b: The requested graph is shown at right with the indicated cross-sectional shape corresponding to the curve to the immediate left of the text. Part c: Although at y =8 feet both cross-sections have the same area (A=160 ft 2 ), the rectangular cross section has a much greater value of momentum [

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Unformatted text preview: M rectangle ( y =8 ft) = 671 ft 3 ] compared to the trapezoidal section [ M trapezoid (y=8 ft) = 500 ft 3 ]. Both curves have similar shape, but the trapezoidal curve is shifted upwards by approximately 1 to 1.5 feet. In other words, the two curves are roughly equivalent except that the trapezoidal curve needs 1 to 1.5 feet more of depth than the rectangular curve to obtain the same momentum value as the trapezoidal curve....
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cee4324-5984-f11hw3-solutions - M rectangle y =8 ft = 671...

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