1. The problem statement, all variables and given/known data A copper sample whose mass mc is 75 g is heated in a laboratory oven to a temperature of 312 degrees Celsius. The copper is then dropped into a glass beaker containing mass mw = 220 g of water. The effective heat capacity of the beaker is 190 J/K. The initial temperature of the water and beaker is 12 degrees Centigrade. What's the common final temperature of the copper, glass, and water? 2. Relevant equations Q = mcΔT (mw)(cw)(ΔTw) = (mc)(cc)(ΔTc) 3. The attempt at a solution I tried substituting the given values into the equation but I was confused about what to do with the heat capacity of the beaker.