Work is defined as the exertion of force through a distance.Which of the following is NOT an example of work?
A) Molecules in the air push against the blades of a windmill.
B) Blood is pumped through the circulatory system.
C) Electrons flow against the resistance present in a copper wire.
D) Thermal energy heat) is transferred from a hot stove to the surrounding air.
E) A student lifts a book off of the floor.
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