Concept explainers
(a)
The activity in curies due to each of the isotopes.
(a)
Answer to Problem 63AP
The activity in curies due to each of the isotopes is
Explanation of Solution
Write the expression to find the mass of
Here,
Substitute
Conclusion:
Write the expression to find the number of nuclei in
Substitute
Write the expression to find the activity of
Here,
Substitute
Write the expression to find the number of nuclei in
Substitute
Write the expression to find the activity of
Here,
Substitute
Write the expression to find the number of nuclei in
Substitute
Write the expression to find the activity of
Here,
Substitute
Thus, The activity in curies due to each of the isotopes is
(b)
The fraction of the total activity due to isotopes.
(b)
Answer to Problem 63AP
The fraction of the total activity due to isotopes are
Explanation of Solution
the activity of
Write the expression to find the total activity of the sample.
Here,
Substitute
Conclusion:
Thus, the fraction of activity due to
(c)
Whether activity of the sample is dangerous.
(c)
Answer to Problem 63AP
Yes. The activity of the sample is dangerous.
Explanation of Solution
The activity of
Write the expression to find the total activity of the sample.
Here,
Substitute
Conclusion:
Since, the activity of the sample is
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Chapter 43 Solutions
Physics for Scientists and Engineers with Modern Physics
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- (a) Calculate the energy released in the neutron- Induced fission reaction n+235U92Kr+142Ba+2n , given m(92Kr) = 91.926269 u and m(142Ba)= 141.916361 u. (b) Confirm that the total number of nucleons and total charge are conserved in this reaction.arrow_forwardSuppose you have a pure radioactive material with a half-life of T1/2. You begin with N0 undecayed nuclei of the material at t = 0. At t=12T1/2, how many of the nuclei have decayed? (a) 14N0 (b) 12N0(C) 34N0 (d) 0.707N0 (e) 0.293N0arrow_forward
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