President Polk's claim that "American blood [had been shed] on the American soil" referred to news of an armed clash between Mexican and American troops near
A. San Francisco.
B. the Nueces River.
C. Santa Fe.
D. the Rio Grande.
E. San Antonio.
Answer: D
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A 3-phase, 60Hz, 50km long, completely transposed transmission line is built using Drake conductor. Drake conductor has an outside diameter of 1.108 inches; stranding of 26/7 (Al/St), which yields a GMR for the conductor of 0.0375 feet. Resistance at 60-Hz for this conductor is 0.117 ?/mile. A horizontal tower configuration is used, with a phase spacing of 25 feet (25 feet between left and center phases, 25 feet between center and right, and hence 50 feet between left and right). Bundling is used, with 2 conductors per phase, spaced 1 foot apart. For reference µ0 = 4? x 10-7 H/m and ?0 = 8.854 x 10-12 F/m.
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