The value of specific heat for copper is 390 J/kg⋅C∘, for aluminun is 900 J/kg⋅C∘, and for water is 4186 J/kg⋅C∘.What will be the equilibrium temperature when a 275g block of copper at 255∘C is placed in a 145g aluminum calorimeter cup containing 855g of water at 12.0∘C?