Students on a spring break picnic bring a cooler that contains5.1 kg of ice at 0.0 °C. The cooler has walls that are 3.8 cm thickand are made of Styrofoam, which has a thermal conductivity of0.030 W>1m # C°2. The surface area of the cooler is 1.5 m2, and itrests in the shade where the air temperature is 21 °C. (a) Find therate at which heat flows into the cooler. (b) How much time doesit take for the ice in the cooler to melt?

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