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  3. the porosity of the granite rock is 0005 assume that...

Question: the porosity of the granite rock is 0005 assume that...

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The porosity of the granite rock is 0.005%. Assume that 10% of the 222Rn in the typical granite rock escapes into the porosity. What is the concentration of radon gas in Bq/m3 in the soil air assuming secular equilibrium?

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