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Anastaziya [24]
3 years ago
11

What is North Americas climate year long weather mostly like

Geography
1 answer:
Margaret [11]3 years ago
3 0

Most part of the rest of North America is cold in the winter and warm in the summer, with moderate precipitation. Some areas have mild winters and long, hot summers and others have harsh winters and short summers

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Explanation:

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meriva

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Calculate the amount, in grams, of an original 300-gram sample of radioactive isotope Potassium-40 remaining after
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Answer:

The current amount of the Potassium-40 sample is approximately 37.521 grams.

Explanation:

The amount of the sample of the radioactive isotope decays exponentially in time, the amount of mass of the sample as a function of time (m (t)), in grams, is described below:

m(t) = m_{o}\cdot e^{-\frac{t}{\tau} } (1)

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If we know that m_{o} = 300\,g, t = 3.9\times 10^{9}\,yr and t_{1/2} = 1.3\times 10^{9}\,yr, then the current amount of the sample is:

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