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2.77 A steel rod 3 ft long with a cross-sectional area of 0.3 in.2 is stretched between two fixed points. The tensile force in the rod is 1200 lb at 40°F. Using a = 5.5 × 10-6/°F and E = 29 × 106 psi, calculate the temperature at which the stress in he rod will be (a) 10 ksi; and (b) zero.

2.77 A steel rod 3 ft long with a cross-sectional area of 0.3 in.2 is stretched between two fixed points. The tensile force in the rod is 1200 lb at 40°F. Using a = 5.5 × 10-6/°F and E = 29 × 106 psi, calculate the temperature at which the stress in he rod will be (a) 10 ksi; and (b) zero.

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2.77 A steel rod 3 ft long with a cross-sectional area of 0.3 in.² is stretched between two fixed points. The tensile force in the rod is 1200 lb at 40°F. Using a = 6.5 × 10-6/°F and E = 29 × 106 psi, calculate the temperature at which the stress in the rod will be (a) 10 ksi; and (b) zero.
Transcribed Image Text:2.77 A steel rod 3 ft long with a cross-sectional area of 0.3 in.² is stretched between two fixed points. The tensile force in the rod is 1200 lb at 40°F. Using a = 6.5 × 10-6/°F and E = 29 × 106 psi, calculate the temperature at which the stress in the rod will be (a) 10 ksi; and (b) zero.
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