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Author Question: Iron-59 has a half-life of 44 days. A radioactive sample has an activity of 0.64 mBq. What is the ... (Read 70 times)

roselinechinyere27m

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on: Jun 7, 2021

Question 1

Krypton-79 has a half-life of 35 h. How many half-lives have passed after 105 h?
◦ 1 half-life
◦ 2 half-lives
◦ 3 half-lives
◦ 4 half-lives
◦ 5 half-lives

Question 2

Iron-59 has a half-life of 44 days. A radioactive sample has an activity of 0.64 mBq.  What is the activity of the sample after 88 days?
◦ 0.32 mBq
◦ 0.16 mBq
◦ 0.64 mBq
◦ 1.28 mBq
◦ 0080 mBq
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Marked as best answer by roselinechinyere27m on Jun 7, 2021

Carissamariew

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Reply #1 on: Jun 7, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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roselinechinyere27m

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Reply 2 on: Jun 7, 2021
:D TYSM

JaynaD87

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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