February 2019 1 16 Report
Seorang pengamat melihat kilat 0,2 s kemudian mendengar bunyi petirnya. jika cepat rambat cahaya di udara sebesar 3×10 pangkat 8 m/s dan cepat rambat bunyi di udara sebesar 400 m/s, jarak terjadinya kilat terhadao pengamat adalah?
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