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Question: 7 an iron block of 20 kg undergoes a...

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#7 . An iron block of 20 kg undergoes a process during which there is a heat transfer from the block at 4 kJ/kg, an elevation increase of 50m, and an increase in velocity from 10 m/s to 50 m/s. During the process, which also involves a work transfer, the internal energy of the block decreases by 100 kJ. Determine the work transfer during this process in kJ if the total energy remains constant. Is the work being done to the system or by the system? ANS: 13.81 kJ, done to system

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