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Question 4 (5 points) Wood is a composite material that consists of long aligned fibers of cellulose in a lignin matrix. The ratio of the

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Question 4 (5 points) Wood is a composite material that consists of long aligned fibers of cellulose in a lignin matrix. The ratio of the elastic modulus of wood in the longitudinal direction (along the grain) to that in the transverse direction (perpendicular to the grain) is 10. If the volume fraction of cellulose is 0.5, estimate the ratio of the elastic modulus of the cellulose to that of the lignin

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