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Exploding shoes. The rain-soaked shoes of a person may explode if ground current from nearby lightning vaporizes the water. The sudden conversion of water to water vapor causes adramatic expansion that can rip apart shoes. Water has density 1000kg/m3 and requires 2256 kJ/kg to be vaporized. If horizontal current lasts 2.27 ms and encounters water with resistivity 177 Ω·m, length 12.2 cm, and verticalcross-sectional area 15.3 ×10-5 m2, what average current (in A) isrequired to vaporize the water?

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