. On October 26, 2019, an archaeologist unearthed a radioactive specimen. Month later, he weighed the material and found out to be 180 pounds. A year later since last time he took its weight, only 84 pounds of the sample remains. Calculate: (Reference date will be the day the sample was unearthed and assume 1yr= 360days and 1month=30days) a.) %decayed on November 26, 2019 b.) fraction of sample remains a year after Nov. 26,2019 c.) date (month day, year)
. On October 26, 2019, an archaeologist unearthed a radioactive specimen. Month later, he weighed the material and found out to be 180 pounds. A year later since last time he took its weight, only 84 pounds of the sample remains. Calculate: (Reference date will be the day the sample was unearthed and assume 1yr= 360days and 1month=30days) a.) %decayed on November 26, 2019 b.) fraction of sample remains a year after Nov. 26,2019 c.) date (month day, year)
Chapter10: Radioactivity And Nuclear Processes
Section: Chapter Questions
Problem 10.51E
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Question
1. On October 26, 2019, an archaeologist unearthed a radioactive specimen. Month later, he
weighed the material and found out to be 180 pounds. A year later since last time he took its
weight, only 84 pounds of the sample remains. Calculate: (Reference date will be the day
the sample was unearthed and assume 1yr= 360days and 1month=30days)
a.) %decayed on November 26, 2019
b.) fraction of sample remains a year after Nov. 26,2019
c.) date (month day, year) at which half of the specimen decayed
d.) time in years at which 90% of the original amount decayed.
e.) approximate no. of years at which all the specimen will be depleted
Answer a,b,c only thank you
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