A small amount of solution containing radionuclide with activity disintegration per second was injected into the bloodstream of a man. The activity of 1 of the blood sample taken t= 5.0 hours later turned out to be A'= 16 disintegration per minute per . The half-life of the radionuclide is T= 15 hours. Find the volume of the man's blood.

Updated on : 2022-09-05
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Let = volume of blood in the body of the human being. Then the total activity of the blood is
Assuming all this activity is due to the injected and taking account of the decay of this radionuclide, we get


Now                per hour , 

Thus              litre 

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