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30 October, 12:52

The half-life of a certain material is 0.002 second. Approximately how much of a 14-gram sample will be left after 0.004 second?

A.

12 grams

B.

3.5 grams

C.

0.06 gram

D.

7 grams

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Answers (1)
  1. 30 October, 15:15
    0
    B. 3.5 grams.

    Step-by-step explanation:

    After 0.002 seconds 1/2 * 14 = 7 grams will be left.

    After another 0.002 seconds (total 0.004 seconds), 1/2 * 7 = 3.5 grams will be left.
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