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OpenStudy (anonymous):
a swimmer at distance D= 35.0m from a lightning strike to the water, with current, I = 78kA. The water has resistivity 30Ωm, the width of the swimmer along a radial line from the strike is 0.70m, and his resitance across that width is 4.00 kΩ. Assume that the current spreads through the water over a hemisphere centered on the strike point. What is the current through the swimmer?
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