Concept explainers
(a)
The half-life in seconds.
(a)
Answer to Problem 19P
Explanation of Solution
Given info: Half-life of
The half life is,
Conclusion:
The half-life is
(b)
The decay constant.
(b)
Answer to Problem 19P
Explanation of Solution
Given info: Half-life of
Formula to calculate the decay constant is,
Substitute
Conclusion:
The decay constant is
(c)
The activity in SI unit.
(c)
Answer to Problem 19P
Explanation of Solution
Given info: Activity of
The activity in SI unit is,
Conclusion:
The activity in SI unit is
(d)
The number of
I 131
.
(d)
Answer to Problem 19P
Explanation of Solution
Given info: Activity of
Formula to calculate the number of
Substitute
Conclusion:
The number of
(e)
The number of half-lives completed and activity.
(e)
Answer to Problem 19P
The number of half-lives completed is 5.
The activity is
Explanation of Solution
Section 1:
To determine: The number of half-lives completed.
Answer: The number of half-lives completed is 5.
Explanation:
Given info: Activity (
Formula to calculate the number of half-lives is,
Substitute 40.2 days for t and 8.04 days for
The number of half-lives completed is 5.
Section 2:
To determine: The activity.
Answer: The activity is
Explanation:
Given info: Activity (
Formula to calculate the activity is,
Substitute
The activity is
Conclusion:
The number of half-lives completed is 5.
The activity is
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Chapter 29 Solutions
College Physics (Instructor's)
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