State the meaning for the terms Hooke’s law, spring constant, dry friction, viscous friction, and universal gravitational constant.

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Chapter 10.2, Problem BYGV

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State the meaning for the terms Hooke’s law, spring constant, dry friction, viscous friction, and universal gravitational constant.

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Q2/ In a design of a portable sprinkler system, the following information is given: • • The sprinklers are distributed in a square pattern with radius of the wetted circle of the sprinkler=15 m Consumption rate = 10 mm/day Efficiency of irrigation = 60% Net depth of irrigation (NDI)= 80 mm. Find the following: 1-Sprinkler application rate if HRS = 11. 2-Number of pipes required for irrigation. (50 Marks) 3-Discharge of sprinkler, diameter of nozzle, and the working head pressure if C=0.90. 4-Diameter of the sprinkler pipe for Slope=0. 5-Pressure head at the inlet and at the dead end of the sprinkler pipe for Slope=0. (F² + L²)((SF)² + L²) L² 2L² ≤ D² L² + S² ≤ D² A, = * 1000 S*L ≤D² N W Af m-11-P L' Hf = 1.14*109 * 1.852 * L *F,where c=120 D4.87 Source main pipe 180 m 540 m N 1 1 √m-1 F = im/Nm+1 = + + m+1 2N 6N2 i=1 Nozzle diameter (mm) 3< ds 4.8 4.8< ds 6.4 6.4

Miniatry of Higher scent Research University of Ke Faculty of Engineering Cell Engineering Department 2024-2025 Mid Exam-1 st Attempt Time Date: 17/04/2025 Notes: Answer all questions. Not all figures are to scale. Assume any values if you need them. Q1/ A farm with dimensions and slopes (50 Marks) = shown in the figure below. If you asked to design a border irrigation system and if you know that Net depth of irrigation - 96mm .Manning coefficient = 0.15, Time of work in the farm is 6 hours/day. Design consumption use of water from the crop (ET) 16 mm/day, Width of the agricultural machine equal to 2.5m, Equation of infiltration - D= 12-05 and Efficiency of irrigation= 60%. You can neglect the recession lag time. Find the width and number of the borders, Irrigation interval and time required to irrigate the whole farm, Depth of flow in the inlet of border Number of borders that irrigated in one day and The neglected recession lag time Slope of irrigation % Maximum border width 0-0.1 30…