krishawnnn
04.08.2019 •
Mathematics
Cobalt 60 has a half-life of about 5 years. how many grams of 300 g sample will remain after 20 years? 1. 0.0625 g 2. 9.375 g 3. 18.75 g 4. 37.5 g
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Ответ:
after 10 years..75 g
after 15 years...37,5
after 20 years...18,75 g
Ответ: