First slide

Conduction

Question

An ice cube is kept on the surface of an aluminium block and another ice cube on the surface of a plastic block. Both blocks have the same temperature. Select the correct statement.

Easy

A

Ice will melt faster on the aluminium block
B

Ice will melt faster on the plastic block
C

Ice will melt equally fast on both the blocks
D

Ice will not melt on the plastic block

Solution

Ice will melt faster on the aluminium block because it has a higher thermal conductivity than plastic and hence conducts heat more rapidly than plastic. Which is why ice melts faster on aluminium.

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