1. Calculate D10 and Cu for graph "B". Indicate if the sample is well or poorly graded. Explain your answer Percent passing by weight 40 30 20 10 100 50 70 60 90 80 0 500 4 3 100 50 211 1 U.S. standard sieve sizes 3 4 6 A 3 4 1 3 2 T 810 14 16 20 30 40 50 70 100 140 200 B 10 5 Grain size millimeters 1 0.5 O 10 20 30 0.1 40 50 60 Cumulative percent retained by weight 70 80 90 100 Review the two graphs in classwork # 10. Calculate D10 and Cu for both graphs (label them "A" and "B"). Indicate if the samples are well or poorly graded. Explain.

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Introduction to Engineering Design

Students are often confused with engineering and design. The term engineering design has two words with different meanings, engineering, and design. The term engineering implies applications of laws and principles of science to design and analyze physical structures and components. In civil engineering, students apply the concept of physics and chemistry to design and build structures and buildings. In engineering disciplines, the term design means determining the dimensions, loads, and associated influences on the component due to the applied loads such as stresses and deformations. The estimation of such parameters is crucial to make the component or structure foolproof.