A radioactive substance is dissolved in a liquid and the solution is heated. The activity of the solution:
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A radioactive substance is dissolved in a liquid and the solution is heated. The activity of the solution:

G1 Physics · Accepted Answer

Step 1: Use N(t) = N₀ exp(−λt), A = λN and T₁/₂ = ln2/λ. Step 2: For two samples, write the decay law separately and equate the required activities/numbers. Final: C: is equal to that of element.