How does the kinetic energy of the hot and cold bricks below change as time passes?
A) The kinetic energy of the bricks does not change as time passes.
B) Kinetic energy increases in both blocks.
C) Kinetic energy in the hot block decreases and kinetic energy in the cold block increases.
D) Kinetic energy in the hot block increases and kinetic energy in the cold block decreases.
E) Kinetic energy decreases in both blocks.

Question

How does the kinetic energy of the hot and cold bricks below change as time passes? 
A) The kinetic energy of the bricks does not change as time passes. 
B) Kinetic energy increases in both blocks. 
C) Kinetic energy in the hot block decreases and kinetic energy in the cold block increases. 
D) Kinetic energy in the hot block increases and kinetic energy in the cold block decreases. 
E) Kinetic energy decreases in both blocks.

Quizplus · Accepted Answer

The kinetic energy of an object is directly proportional to its temperature. Therefore, as the hot brick cools down, its kinetic energy decreases, and as the cold brick is being heated, its kinetic energy increases.

How Does the Kinetic Energy of the Hot and Cold