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Masja [62]
4 years ago
10

If the diameter is 21 CM so what is the radius?​

Chemistry
1 answer:
vitfil [10]4 years ago
3 0

Answer:

10.5

Explanation:

half of a diameter is a radius, so you divide 21 by 2 to get your radius

21 divided by 2 is 10.5

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The general equation for radioactive decay is;
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N₀ - amount initially present 
substituting the values 
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ln (0.5) = -0.081t
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t = 0.693 / 0.081 
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