A steel sphere, at 300°C, holds water at 100 kPa, 300°C. The system (steel plus water) cools to the ambient temperature of 20°C by losing 1988 kJ of heat. During this process the entropy of the steal sphere and water decrease by 3.3 kJ/K and 1.4 kJ/K, respectively. The entropy generation (kJ/K) for this process is most closely equal to:

An electric motor is used to drive a power press which makes steel turning moment diagrams 323 pressings from a metal sheet. the motor runs at a mean speed of 50 rev/s. the torque required is 10.0nm for 0.2s, followed by 1.0nm for0.3 s with this sequence then being repeated. what is the minimum power required of the motor and the moment of incrtia required for the t1ywhcel if the speed fluctuations are to be restricted to 1.5%?