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Author Question: A sample of wood from an Egyptian mummy case gives a count of 7.0 cpm/gC (counts per minute per gram ... (Read 61 times)

jasdeep_brar

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on: Mar 21, 2021

Question 1

A radioactive sample has an initial activity of 2.00 × 106 cpm (counts per minute), and after 4.0 days, its activity is 9.0 × 105 cpm. What is its activity after 31 days?

◦ 8.3 cpm
◦ 4.1 × 103 cpm
◦ 4.9 × 102 cpm
◦ 1.0 × 10–9 cpm
◦ None of these are correct.

Question 2

A sample of wood from an Egyptian mummy case gives a count of 7.0 cpm/gC (counts per minute per gram of carbon). How old is the wood? (The initial decay rate of is 15.3 cpm/g C, and its half-life is 5730 years.)

◦ 3233 yr
◦ 8965 yr
◦ 6465 yr
◦ 7515 yr
◦ None of these are correct.
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Marked as best answer by jasdeep_brar on Mar 21, 2021

owenfalvey

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Reply #1 on: Mar 21, 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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jasdeep_brar

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Reply 2 on: Mar 21, 2021
Great answer, keep it coming :)

yeungji

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Reply 3 on: Yesterday
Excellent

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