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GenaCL600 [577]
3 years ago
10

The average 8-18 year old spends how many hours per day average in front of a screen doing little physical activity

Physics
1 answer:
Ne4ueva [31]3 years ago
5 0

Nearly four hours every day, doing little to no physical activity.

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Testing shows that a sample of wood from an artifact contains 25% of the
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<u>Explanation</u>:

Given that,

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So it takes 5730 years for the sample to reduce into half

Initially there will be 100% of the sample so

after first 5730 years, the sample reduces into 50% percent

Now the left 50% sample will take another 5730 years to decay into half of its amount.

after next 5730 years  the sample reduces into 25% percent

So totally after 2 half-life the sample reduces into 25%

That is (5730 +5730) years = 11460 years

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