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The electrical resistivity of 90wt.% Cu-10wt.% Ni cupronickel alloy at room temperature is 16x10-8?.m. The electrical conductivity of copper at room temperature is 6.0x107(?.m) -1. Densities of Cu and Ni are 8.94 and 8.90 g.cm?3, respectively. Calculate the electrical resistivity of nickel at room temperature. Assume that the rule of mixtures holds in solid solutions.
a cylinder made of astm a242 steel is 50cm in diameter and 250mm long and has a wall thickness of 24mm. a round bar of
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