October 2018 1 47 Report
Kawat tembaga memiliki luas penampang 2 m m^{2} .Y = 12 .  10^{11} dyne/ cm^{2} .kawat tersebut diregangkan oleh gaya 16. 10^{6} dyne. jika panjang mula-mula 30 cm , pertambahan panjang kawat adalah ...cm
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