7. If you hold a hand-warmer, what would be considered the system, and what are the surroundings

Answer 1

In this scenario, the hand-warmer would be considered the system, as it is the object being focused on or studied. The surroundings would be the environment in which the hand-warmer is being held, such as the air temperature, pressure, and other external factors affecting the hand-warmer's ability to generate heat.