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Pertanyaan

Perhatikan gambar grafik peluruhan berikut ! Waktu paruh unsur radioaktif tersebut adalah ....

Perhatikan gambar grafik peluruhan berikut !

Waktu paruh unsur radioaktif tersebut adalah ....

  1. 0,25 jam

  2. 0,50 jam

  3. 0,85 jam

  4. 1,00 jam

  5. 1,50 jam

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A. Aulia

Master Teacher

Jawaban terverifikasi

Pembahasan

straight m subscript 0 space space space equals 128 space straight g  straight m subscript sisa equals 4 space straight g  straight t space space space space space space space space equals 2 comma 5 space jam    Maka ∶  straight m subscript sisa equals straight m subscript 0 open parentheses 1 half close parentheses to the power of straight t over straight T subscript 1 divided by 2 end subscript end exponent  4 equals left parenthesis 128 right parenthesis open parentheses 1 half close parentheses to the power of straight t over straight T subscript 1 divided by 2 end subscript end exponent  4 over 128 equals open parentheses 1 half close parentheses to the power of fraction numerator 2 comma 5 over denominator straight T subscript 1 divided by 2 end subscript end fraction end exponent  1 over 32 equals open parentheses 1 half close parentheses to the power of fraction numerator 2 comma 5 over denominator straight T subscript 1 divided by 2 end subscript end fraction end exponent  open parentheses 1 half close parentheses to the power of 5 equals open parentheses 1 half close parentheses to the power of fraction numerator 2 comma 5 over denominator straight T subscript 1 divided by 2 end subscript end fraction end exponent    5 equals fraction numerator 2 comma 5 over denominator straight T subscript 1 divided by 2 end subscript end fraction  straight T subscript 1 divided by 2 end subscript equals fraction numerator left parenthesis 2 comma 5 right parenthesis over denominator 5 end fraction  straight T subscript 1 divided by 2 end subscript equals 1 half space jam

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Aulia Amalina R

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Bahan radioaktif mengandung 2 gram isotop 6 11 ​ C dan mempunyai konstanta peluruhan 0,034/menit. Hitunglah massa isotop 6 11 ​ C setelah meluruh selama 12 menit!

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