October 2018 1 745 Report
Sebuah batang besi dipanaskan Dari suhu 30°C sampai 100°C. Ternyata panjang batang bertambah panjang 2 mm. Berapa panjang batang besi mula - mula ? (Koefisien muai panjang besi= 12 × 10 min 6 /C°).

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