Concept explainers
(a)
Find the number of
(a)
Answer to Problem 63AP
The number of
Explanation of Solution
Write the equation for number of nuclei,
Conclusion:
Substitute
Therefore, the number of
(b)
Find the initial activity in the sample.
(b)
Answer to Problem 63AP
The initial activity in the sample is
Explanation of Solution
Write the equation for decay constant.
Here,
Write the equation for initial activity.
Here,
Conclusion:
Substitute
Substitute
Therefore, the initial activity in the sample is
(c)
Find the time interval does the sample have to be stored.
(c)
Answer to Problem 63AP
The time interval does the sample have to be stored is
Explanation of Solution
Write the equation for radioactive decay.
Here,
Write the equation for decay constant.
Here,
Substitute equation V in IV and rewrite to get time.
Conclusion:
Substitute
Therefore, the time interval does the sample have to be stored is
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Chapter 44 Solutions
Physics: for Science.. With Modern. -Update (Looseleaf)
- (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_forward(a) Calculate the energy released in the a decay of 238U . (b) What fraction of the mass of a single 238U is destroyed in the decay? The mass of 234Th is 234.043593 u. (c) Although the fractional mass loss is large for a single nucleus, it is difficult to observe for an entire macroscopic sample of uranium. Why is this?arrow_forward(a) Calculate the energy released in the a decay of 238U. (b) What fraction of the mass at a single 238U is destroyed in the decay? The mass of 234Th is 234.043593 u. (c) Although the fractional mass loss is laws for a single nucleus, it is difficult to observe for an entire macroscopic sample of uranium. Why is this?arrow_forward
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