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Students on a spring break picnic bring a cooler that contains 5.1 kg of ice at 0.0 °C. The
cooler has walls that are 3.8 cm thick and are made of Styrofoam, which has a thermal
conductivity of 0.030 W/(m. C°). The surface area of the cooler is 1.5 m², and it rests in the
shade where the air temperature is 21 °C. (a) Find the rate at which heat flows into the cooler.

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