University of Wisconsin Stout | Wisconsin's Polytechnic University

Heat: To Change Or Not To Change? - Answer = A

Even though it might seem the expanding plate would force the hole to decrease in size, that is not what happens. Each and every molecule or atom moves away from its neighbor molecule or atom due to its increased vibrational energy because of the heat added to the plate. Thus the outer rim of the hole expands and moves outward increasing the size of the hole, exactly as if the hole were made of the same material as the solid plate.

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