Marble Play - Electroplating Time Calculation · Physics Brawl 2012 #FoL.5
Physics · electromagnetism
Problem
We want to galvanise (in copper sulphate solution) an iron sphere of mass mFe = 8 kg and density ϱFe = 8 g·cm⁻³. We aim for a layer of copper Δr = 2 mm thick. The density of copper is ϱCu = 9 g·cm⁻³, molar mass is MCu = 63.5 kg·mol⁻¹ and we apply constant current I = 0.5 A. How long does the process take? State your answer in days, ceiled (i.e. 3.238 days are 4 days).