An aluminum rod of length l has a resistance of 8 ohms half


An aluminum rod of length l has a resistance of .8 ohms. Half of the rod is machined down so that half of the rod now has half of the radius of the original radius. What will be the new resistance? If it helps the resistivity of aluminum is 2.82*(10^-8) ohm meters.

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Physics: An aluminum rod of length l has a resistance of 8 ohms half
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