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核半減期:序論と解説
Bill Nye Explains Half Life
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半減期化学問題 - 原子核放射性崩壊計算の練習例
What does the term half-life mean?
核半減期:計算
Radioactivity - Half Life - Physics
Half-Life and Radioactivity
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放射性崩壊とは?半減期|崩壊定数|放射能(+問題解決)