Difference between revisions of "Solutions 7"
From mn/safe/nukwik
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Return to [[Problem Solving Sets]] | Return to [[Problem Solving Sets]] | ||
− | + | These exercises it might be usfull to have wallet cards they can for instance be found at [http://www.nndc.bnl.gov/nudat2/indx_sigma.jsp Nudat 2] | |
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− | + | It is in total 3.58 mol = 2.1562<math>\cdot</math> 10<sup>24</sup> atoms of potassium in a average human where 12% that is 2.5876 <math>\cdot</math> 10<sup>20</sup> is <sup>40</sup>K | |
− | + | <math>T(1/2)=1.28\cdot10^{9}=4.0283 10^{16}\,s</math> | |
− | + | <math>\lambda= \frac{\ln 2}/{T_{(1/2)}} = \frac{ln2}/{4.0283 10^16}=1.7206\cdot 10^{-17} s^{-1}</math> | |
− | + | <math>D=\lambda \cdot N= 2.5876\cdot10^{20}\cdot 1.7206\cdot 10^{-17} s^{-1}=4452.45\, Bq</math> | |
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Revision as of 11:52, 22 June 2012
This solution set contains a large number of errors, and is under revision. It will be updated as soon as possible.
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These exercises it might be usfull to have wallet cards they can for instance be found at Nudat 2
1:
It is in total 3.58 mol = 2.1562
1024 atoms of potassium in a average human where 12% that is 2.5876 1020 is 40K