A Z-channel wing spar is constructed using 4 stringers and 3 very thin skin panels. The cross-section properties of each stringer are (A = 0.4 in2, Iyy = 0.2 in4, Izz = 0.3 in4, Iyz = 0.3 in4). Calculate the Z-channel cross section product of inertia (Iyz) for b = 2.33 inch and h = 2.68 inch. Neglect the skin. (Units: inch^4).

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the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3

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