Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 7, Problem 7.12P
To determine
The RR and ERR for the group of 202 leukemia cases in 76000 subjects.
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' A GM counter records 16.000 Counts per minute. while the true
counting rate is 17.400 counts per minute. What is the dead
time of the
counter?
The cell-survival data in the table below fit a multitarget, single-hit survival curve.
A)Find the slope at high doses.
B) Find the extrapolation number.
C) Write the equation that describes the data.
Dose (Gy)
Surviving Fraction
0.10
0.993
0.25
0.933
0.50
0.729
1.00
0.329
2.00
0.0458
3.00
0.00578
4.00
0.00072
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BIEE
Using the systematics of exponential processes, the time scale for getting out of a pandemic at its peak through exponential decay of the infection rate or the death rate is estimated from:
If the delta variant death rate per day (Po) peaked at 2000 in late September and declined at the national rate of − 1% per day, what is t, the time in days to defeat the virus (i.e. time until the last person dies)?
answer choices:
350
525
450
760
Chapter 7 Solutions
Introduction To Health Physics
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