#4 A 68.5.g copper rod at the temperature of 96.5 C has to be cooled to 22.0 'C by mixing it with cold 14 pts. water at 18.0 C. How much water has to be used? Specific heat of copper is 0.0923 cal/g "C. #5 How much heat must be added to 25.6 g of water at 23.0 'C to fully boil it away (convert into steam)? 14 pts. 6 A 120. g baseball moving with the velocity of 28.5 m/s toward a spring that has the spring constant of 4 pts. 4650 N/m. When the baseball comes to rest compressing the spring, how much is the spring compressed? Neglect air resistance