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dusya [7]
2 years ago
11

There are initially No nuclei in a radioactive source. After a time interval of three half-lives, what is the number of nuclei t

hat have decayed?
Physics
1 answer:
ladessa [460]2 years ago
6 0

The number of nuclei that have decayed after three half-lives is 12.5% of the original mass.

<h3>What is half live of radioactive isotope?</h3>

The half life of a radioactive isotope is the time taken for the element to decay to half of its original mass.

<h3>Number of nuclei decayed after 3 half lives</h3>

N = N₀/(2³)

N = N₀/8

N = 0.125N₀

N = 12.5% of N₀

where;

  • N is n number of nuclei that have decayed after 3 half lives
  • N₀ is the original mass

Thus, the number of nuclei that have decayed after three half-lives is 12.5% of the original mass.

Learn more about half life here: brainly.com/question/10525285

#SPJ1

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A 42.6kg lamp is hanging from wires as shown in figure.The ring has negligible mass. Find tensionsT1, T2,T3 if the object is in
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Answer:

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Explanation:

Using the sin rule to fine the tension in the strings;

Given

amass = 42.6kg

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T3 = 417.48sin30

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Also;

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T2 = 417.48sin60

T2 = 417.48(0.8660)

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