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Ipatiy [6.2K]
2 years ago
6

When the topic of cancer receives vertical ray of Sun. I What would be the season in southern hemisphere.?

Geography
1 answer:
Len [333]2 years ago
3 0

Answer:

winter, sorry for being late

Explanation:

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slava [35]

More than 75 percent

Explanation:

Let us carefully analyze this problem:

The half life of the rubidium isotope = 50 billion years

   The half-life of a radioactive isotope is the time it takes for it to decay to half of its original amount.

  Every 50years, we know that a rubidium isotope would split into half.

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  ratio of parent to daughter = 100 : 0

When the isotope decays to half; we would have equal number of parent and daughter:

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The age of the earth is about 4.6billion years;

this is;

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At this time, we should know that only 9.2 percent of the daughter would have been formed.

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learn more

Radioactive decay brainly.com/question/10125168

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