December 2018 1 14 Report
Suhu batang baja mula-mula 25 derajat C dipanaskan hingga suhunya mencapai 145 derajat C. Ketika diukur , jarum dialmeter menunjukkan nilai 2,64 mm. Jika koefisien muai panjang baja 1,1 x 10 pangkat -5 / derajat C , panjang mula-mula batang baja adalah .. cm
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