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5 August, 07:30

Two scientists are experimenting with pure samples of isotope X, a highly radioactive substance. The first scientist has a sample with a mass of 20 grams. He measures a half-life of 232 seconds. The second scientist has a sample of the same substance with a mass of 80 grams. What is the half-life that she is most likely to measure?

A. 58 seconds

B. 232 seconds

C. 464 seconds

D. 928 seconds ... ?

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Answers (1)
  1. 5 August, 07:46
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    B) 232 seconds

    The half-life of a radioactive substance remains the same, regardless of the sample size.
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