3.91 As shown in Fig. P3.91, a closed, insulated tank contains 0.15 kg of liquid water...

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3.91 As shown in Fig. P3.91, a closed, insulated tank contains 0.15 kg of liquid water and has a 0.25-kg copper base. The thin walls of the container have negligible mass. Initially, the tank and its contents are all at 30C. A heating element embedded in the copper base is energized with an electrical current of 10 amps at 12 volts for 100 seconds. Determine the final temperature, in C, of the tank and its contents. Data for copper and liquid water are provided in Table A-19. Insulation Water, m = 0.15 kg -Copper base, m = 0.25 kg Fig. P3.91 3.91 As shown in Fig. P3.91, a closed, insulated tank contains 0.15 kg of liquid water and has a 0.25-kg copper base. The thin walls of the container have negligible mass. Initially, the tank and its contents are all at 30C. A heating element embedded in the copper base is energized with an electrical current of 10 amps at 12 volts for 100 seconds. Determine the final temperature, in C, of the tank and its contents. Data for copper and liquid water are provided in Table A-19. Insulation Water, m = 0.15 kg -Copper base, m = 0.25 kg Fig. P3.91