Final answer:
Thermal equilibrium occurs when two objects are at the same temperature and there is no net heat transfer between them. When you hold an ice cube, heat from your hand is transferred to the ice cube, causing it to melt and reach thermal equilibrium with your hand.
Step-by-step explanation:
Thermal equilibrium is a state in which two objects are at the same temperature and there is no net heat transfer between them. When you hold an ice cube, heat from your hand is transferred to the ice cube, causing it to melt. Eventually, the ice cube and your hand reach the same temperature, and they are said to be at thermal equilibrium.
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