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A copper rod of cross-sectional area 11.2 cm2 has one end immersed in boiling water and the other in an ice-water mixture, which is thermally well insulated except for its contact with the copper. The length of the rod between the containers is 20.4 cm, and the rod is covered with a thermal insulator to prevent heat loss from the sides. How many grams of ice melt each second? (The thermal conductivity of copper is 390 W/m-C°.)

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