A 200 g calorimeter contain 500 g of water at 21 degree Celsius. A 100g of ice at -20 degree Celsius is placed into the calorimeter. After thermal equilibrium the final temperature is 35 degree Celsius. The specific heat of ice is = 2090 J/kg. The specific heat of water = 4186 J/kg.
What is the specific heat of the material of the calorimeter?