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The rear window of a van is coated with a layer of ice at 0°C. The density of ice is 917 kg/m³, and the latent heat of fusion of water is 3.35 x 10⁵ J/kg. The driver of the van turns on the rear-window defroster, which operates at 12 V and 23 A. The defroster directly heats an area of 0.45 m² of the rear window. What is the maximum thickness of ice above this area that the defroster can melt in 3.6 minutes?

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