A small amount of solution containing Na24 radionuclide with activity A=2.0.103 disintegration per second was injected into the bloodstream of a man. The activity of 1 cm3 of the blood sample taken t= 5.0 hours later turned out to be A'= 16 disintegration per minute per cm3 . The half-life of the radionuclide is T= 15 hours. Find the volume of the man's blood.
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Updated on : 2022-09-05
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Let V = volume of blood in the body of the human being. Then the total activity of the blood is A′V.
Assuming all this activity is due to the injected Na24 and taking account of the decay of this radionuclide, we get