October 2018 2 79 Report
4 kg besi di panaskan dari 20 derajat Celcius hingga 70 derajat Celcius. Kalor jenis besi 460 J/Kg derajat Celcius. energi kalor yg diperlukan adalah...
a. 9200 J c. 92000 J
b. 32200 J d. 394000 J

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