A Styrofoam box used to keep drinks cold at a picnic has a wall thickness of 9 cm. It’s filled with ice, water, and cans of cola at 0℃. a. What is the total wall area of the Styrofoam box if the rate of heat flow into the box is 9.5 J/s if the temperature of the outside wall is 38℃? b. How much ice melts in five hours?

Physics for Scientists and Engineers: Foundations and Connections
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Author:Katz, Debora M.
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Chapter19: Temperature, Thermal Expansion And Gas Laws
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A Styrofoam box used to keep drinks cold at a picnic has a wall thickness of 9 cm. It’s filled with ice, water, and cans of cola at 0℃.

a. What is the total wall area of the Styrofoam box if the rate of heat flow into the box is 9.5 J/s if the temperature of the outside wall is 38℃?

b. How much ice melts in five hours?

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