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antiseptic1488 [7]
3 years ago
7

If U-235 has a half-life of 713 million years and the age of the sample is 2.631 billion years old then how many half-lifes has

this sample undergone (Answer to 2 decimal places)
Mathematics
2 answers:
lutik1710 [3]3 years ago
8 0
<span>As the age of the U-235 sample is 2.631 billion years, and the half-life of U-235 is 713 million years, the sample has undergone 2.361 X 1,000,000,000 / 713 X 1,000,000 = 3.69 half lives. In each half-life the sample reduces to half its original weight according to the radioactive Half-Life Formula: ln (Nt /N0) = -kt, where N0 = mass of the original weight of radioactive material, Nt = mass of radioactive material at time t, k = decay constant and t = time interval . We have to put Nt/N0 = 1/2 for time interval = half-life.</span>
OverLord2011 [107]3 years ago
5 0

Answer:

i have no clue sorry

Step-by-step explanation:

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