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▼ Part A The A-36 steel dinill shaft of an oil well extends 12000 ft into the ground. The pipe used to drill the well is suspended freely from the derrick at A. (Figure 1) The shaft consists of three different sizes of pipe. AAB = 2.90 in.. ABC 2.10 in, and ACD = 1.50 in.2, each having the length and weight per unit length indicated. Determine the maximum average normal stress in pipe string AB Express your answer to three significant figures and include appropriate units. σ,-1 Value Units Submit Request Answer Part B Determine the maximum average normal stress in pipe string BC Express your answer to three significant figures and include appropriate units Figure 1 of 1> dB =1 Value Units 000 ft waa = 3.2 lb/ft Submit Request Answer Asc wac= 2.8 lb/ft 5000 ft Part C 2000 t Determine the maximum average normal stress in pipe string CD Express your answer to three significant figures and include appropriate units.
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olm Load A,- 2in -160으으 -5513.24人5/ inㄴ 30000人ら 卉,二2-10 in2 C) In portion cD 3 34400o lb 6て阜ー 34000 -22666-47 1.S r,レ, A33 2

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