The initial activity of a sample of the cesium isotope 137Cs is 120 mCi . When...

Question

Question

The initial activity of a sample of the cesium isotope 137Cs is 120 mCi . When delivered to a hospital 13 hours later, its activity is 95 mCi.

a.)What is the isotope's half life? t_h=___________ h

b.)If the minimum usable activity is 10mCi, how long after delivery at the hospital is the sample usable? t=__________h

Answer 1

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