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 13, Problem 13.26P
To determine
At what 14 C concentration should the alarm be set?
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The average American daily diet consists of 2,400 kilocalories. A kilocalorie contains 4814 J. Assume that this daily intake of kilocalories is completely metabolized at a uniform rate over a 24 hour period. What is the average power generation of the average American over the 24 hour period? Report your answer in units watts (W).
I recieved 4814W per 24 hours but am unsure if I am correct.
The second-order decomposition of HI has a rate constant of 1.80×10-3 M-1·s-1. Calculate the half-life of the reaction in minutes when the initial concentration of HI is 0.12 M.
In an engine test the dry volumetric analysis of the products was CO2 0.0527, O2 0.1338 and N2
0.8135. Assume the fuel is a pure hydrocarbon and that it is completely burnt.
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Estimate:
(b) The ratio of carbon to hydrogen in the fuel by mass.
(c) The air/fuel ratio by mass.
Assume the percentage of nitrogen in air is: 76.7% by mass and 79% by volume (or mole).
NOTE: Do not solve this problem in tabulated form, otherwise your answer will be considered
totally wrong.
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