سياسي وحي بصمة 1 light year in au كآبة اقفز انفجار
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SOLVED:(II) A light-year is the distance light travels in one year (at speed =2.998 \times 10^{8} \mathrm{m} / \mathrm{s} ) . (a) How many meters are there in 1.00 light-year? (b) An
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