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.
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.
(a) Write the complete balance chemical equation on volume basis.
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
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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.
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