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المسافة المتوسطة بين الشمس و الارض D=150000000 احسب المدة الزمنة التي يستغرقها ضوء الشمس للوصول الى الارض علما ان سرعة الضوء c=300000000m/s؟

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Question added by soumia gnn
Date Posted: 2015/12/06
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