Answer
Only that together, the cold water and cup, gain 400 J of heat. Since both the cup and water will experience the same temperature change, most of the 400J will end up in the water because of its high specific heat compared to aluminum.
Work Step by Step
Only that together, the cold water and cup, gain 400 J of heat. Since both the cup and water will experience the same temperature change, most of the 400J will end up in the water because of its high specific heat compared to aluminum.