The units of resistivity don't come out right.
10^-8 Ohm * m
m Ohm * cm
the 'm' should be a 'mu', but unfortunately they both look the same in the latin alphabet.
I havea question about something that happened to me. rather happened to a wind generator that I constructed in my backyard. it involved the lead packing around the generator shaft and a direct lighning strike.
One night shortly after Iput the generator up, I was up duing a thunderstorm watch it between flashes of lightningand it took a direct hit. Iwas surprised by the power of the strike, three distinct bolts hit the aluminum (4ft dia) rotor and the shaft. Two hit the tips of the blades and one hit the shaft directly on the rotor end.