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deff fn [24]
3 years ago
12

What is a zone of weak, variable winds located at 30 degrees north and 30 degrees south?

Chemistry
1 answer:
timurjin [86]3 years ago
4 0

Answer:

Horse latitude, trade winds

Explanation:

  • The area of the low pressure or the calm consists of the variable light winds that blow near the equator are known to the marines as the doldrums and they form a circuital pattern near the earth atmosphere.
  • Forms at a center of the near the higher pressure systems called as the horse latitudes where the  trade winds at the surface are weak and variable and this zone is found generally in latitudes of the 30° North and South of the equator and move in an east to west direction.

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If we start with 8000 atoms of radium-226 how much would remain after 3200 years?
olya-2409 [2.1K]
<h3>Answer:</h3>

2000 atoms

<h3>Explanation:</h3>

We are given the following;

Initial number of atoms of radium-226 as 8000 atoms

Time taken for the decay 3200 years

We are required to determine the number of atoms that will remain after 3200 years.

We need to know the half life of Radium

  • Half life is the time taken by a radio active material to decay by half of its initial amount.
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where n is the number of half lives

n = 3200 years ÷ 1600 years

 = 2

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Remaining amount = 8000 atoms × 0.5^2

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Thus, the number of radium-226 that will remain after 3200 years is 2000 atoms.

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