Strontium-90 is used in machines that control the thickness of paper during the manufacturing process. Stront-90 has a half-life of 28 years. Determine how much time has elapsed if the following fraciton of a strontium-90 sample remains?
a)1 / 4
b) 1 / 8
c) 1 / 32Strontium-90 is used in machines that control the thickness of paper during the manufacturing process. Stront-
Never heard of strontium 90 being used in pulp / paper industry ! , but a] = 56 yrs. b] = 84 yrs. and c] = 140 yrs.
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