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A closed, insulated tank contains .15 kg of liquid water and has a .25 kg copper...

A closed, insulated tank contains .15 kg of liquid water and has a .25 kg copper base. The thin walls of the container have negligible mass. Initially, the tank and its contents are all at 30 degrees Celsius. 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.
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