Final answer:
Water in a cup and a kettle can have the same temperature even though the quantities are different due to thermal equilibrium. The heat transfer stops once the two objects reach the same temperature.
Step-by-step explanation:
When water in a cup and a kettle have the same temperature, it means that they have reached thermal equilibrium. Thermal equilibrium occurs when the heat transfer between the two objects stops because they are at the same temperature. The quantity of water does not affect the temperature as long as the heat transfer stops once they reach thermal equilibrium. For example, if you pour boiling water into two cups, one with a metal spoon and the other with a plastic spoon, both cups will eventually reach the same temperature even though the quantities of water are different.