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  3. 1.a radioactive sample has a half-life of 2.5 min.

1.A radioactive sample has a half-life of 2.5 min. What fraction of the sample is left...

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Physics

1.A radioactive sample has a half-life of 2.5 min. What fractionof the sample is left after 40 min?

2. The energy of a 2.00 keVelectron is known to within

Answer & Explanation Solved by verified expert
4.4 Ratings (670 Votes)
1 In every 25 minutes it becomes half 4025 16 Thereforeafter 40 minutes only 1216 th fraction will be leftMathematically A A012th Where A is thefinal amount A0 is the initial amount t is the totaltime and h is the half life A A0124025 A A012162    See Answer
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