minahelahmad14
minahelahmad14 minahelahmad14
  • 13-03-2020
  • Physics
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Jim measures the count rate of a sample of americium-241 as 120cpm. Roughly how long would it take for the count rate to fall below 4 cpm. Show your working

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Аноним Аноним
  • 13-03-2020

Answer:

is that a negitive sign  by 241

Explanation:

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