Mathematics, 18.03.2021 01:00 giiiselleee05
The half-life of strontium-90 is 28 years. How long will it take a 72 mg sample to decay to a mass of 18 mg?
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The half-life of strontium-90 is 28 years. How long will it take a 72 mg sample to decay to a mass o...
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