1. The problem statement, all variables and given/known data A piece of metal with a mass of 1.50 kg, specific heat of 200 J/kg*oC, and initial temperature of 100oC is dropped into an insulated jar that contains liquid with a mass of 3.00 kg, specific heat of 1,000 J/kg*oC, and initial temperature of 0oC. The piece of metal is removed after 5 seconds, at which time its temperature is 20oC. Neglect any effects of heat transfer to the air or insulated jar. The temperature of the liquid after the metal is removed is ... ? 2. Relevant equations [delta]U = Q + W 3. The attempt at a solution I'm not sure how to apply an equation to solve this. Any guidance?