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B. Bentuk Energi .......................................................................... 60
C. Transformasi Energi ................................................................ 67
D. Hubungan Gaya, Gerak, dan Energi ......................................... 69
E. Pengaruh kalor terhadap perubahan wujud benda ................. 71
BAB IV BUNYI DAN CAHAYA ............................................................ 79
A. Bunyi ....................................................................................... 81
B. Cahaya .................................................................................... 85
BAB V SUMBER DAYA ALAM ........................................................... 98
A. SDA Dapat Diperbaharui ....................................................... 100
B. SDA yang Tidak Dapat Diperbaharui ...................................... 103
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