Final answer:
Heat from the hot summer air will transfer to the cooler book until both reach the same temperature, illustrating the principle that thermal energy moves from warmer areas to cooler ones.
Step-by-step explanation:
When Jeffrey brings a book from an air-conditioned apartment to a balcony on a hot summer day, heat from the air will move to the book. This is due to the process of heat transfer, where thermal energy naturally flows from a warmer area to a cooler one until equilibrium is reached. In this scenario, the book initially has a lower temperature than the outside air. According to the principles of thermodynamics, heat will be transferred from the hot outside air to the cooler book until they are both at the same temperature.
The concept of 'coolness' moving from one object to another is a common misconception; in reality, 'coolness' is the absence of heat, so it cannot move or be transferred. Instead, it's the heat energy that is being exchanged between objects at different temperatures.