What happens to the thermal energy of an iron block whose particles vibrate faster?

Question

Responses

The thermal energy of the block’s molecules does not change, but its mass changes.The thermal energy of the block’s molecules does not change, but its mass changes.

The thermal energy of the block decreases.The thermal energy of the block decreases.

The thermal energy of the block’s molecules does not change, and its mass remains the same.The thermal energy of the block’s molecules does not change, and its mass remains the same.

The thermal energy of the block increases.

Answer 1

When the particles of an iron block vibrate faster, this generally indicates an increase in temperature. As the temperature increases, the thermal energy of the block also increases. Therefore, the correct response is:

The thermal energy of the block increases.