Ice cream is made by cooling a mixture of liquid ingredients until they freeze. Figure 6 shows a bowl used for making ice cream. The walls of the bowl contain a liquid coolant. The bowl is cooled to -20 degrees before the mixture is put in the bowl. The bowl causes the mixture to cool down and freeze. Explain why the different thermal conductivities of metal and plastic are important in the design of the bowl.
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Ice cream is made by cooling a mixture of liquid ingredients until they freeze. Figure 6 shows a bow...
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