
Concept explainers
(a)
Number of excess thyroid cancers induced by explosions.
(a)

Answer to Problem 55E
The number of excess thyroid cancers induced by explosions was
Explanation of Solution
Nuclear explosions in atmosphere caused average thyroid dose of
Write the expression of collective dose
Here,
Since 63 cancers are induced per
Conclusion:
Substitute
Substitute
Thus, the number of excess thyroid cancers induced by explosions was
(b)
Fractional increase in present rate of thyroid cancers.
(b)

Answer to Problem 55E
The fractional increase in present rate of thyroid cancers is
Explanation of Solution
Write the expression of number of thyroid cancers in 45 years due to present rate
Here,
Write the expression of fractional increase in present rate
Here,
Conclusion:
Substitute
Substitute
Thus, the fractional increase in present rate of thyroid cancers is
(c)
Chance that an infant develops thyroid cancer.
(c)

Answer to Problem 55E
The chance that an infant develops thyroid cancer is
Explanation of Solution
Thyroid doses received by infants are of
Since 63 cancers are induced per
Here,
Conclusion:
Since risk for infants is same as for whole populations therefore the value of
Substitute
Thus, an infant has chance
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Chapter 31 Solutions
General Physics, 2nd Edition
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