Question

In a calorimetry experiment, an object of mass M= 9.2 kg falls through a height of 35.5 m and, by means of a mechanical linkage, rotates a paddle wheel that stirs m= 0.92 kg of water. The water is initially at 20∘C. What is the maximum possible temperature rise of the water? (The specific heat of water is 4186J/kg⋅K).