Find the new value of the resistance of the rod
An aluminum rod has a resistance of 1.234 4 at 20.0°C. The rod is cooled down to 20 C. And at that temperature it is stretched to twice its length at 20C. Find the new value of the resistance of the rod.
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The structure shown is constructed of circular rod which has a mass of 8.5 kg per meter of length. Determine the moment MO about O caused by the weight of the structure. Find the magnitude of MO.
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