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(6038) Question Category: Mathematical Calculation

The isotope _{19}^{40}	extrm{K} with a half-life of 1.37x109 years decays to _{18}^{40}	extrm{Ar}, which is stable. Moon rocks from the sea of tranquility show that the ratio of these potassium atoms to argon atoms is frac{1}{7}. Determine the age of the moon rock.

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(6039) Question Category: Mathematical Calculation

The half-life of a radioactive substance is 1 hour . How long will it take for 60% of the substance to decay?

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(6040) Question Category: Short answers

what is a nuclear reactor.

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(6041) Question Category: Short answers

Briefly explain any three main components in a nuclear reactor.

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(6042) Question Category: Short answers

Sketch the binding energy curve.

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