the number 60 isnot important to this question.

Cobalt-60 has ahalf-lifeof 5.27 years.

Keenan orders an 80 mg sample of Cobalt-60.

a) Keenan is curious: how much Cobalt-60 will be left in the machine one year later?

b) The Co-60 will only produce enough radiation to be effective if there is at least 50 mg in the machine. How often should Keenan replace the Co-60 sample?

Answer rating: 100% (QA)

a To determine how much Cobalt60 will be left in the machine one year later we can use the concept o... View the full answer