For the situation described in Problems 45.5 and 45.6, what is N/N 0 after 20 years? Problems

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For the situation described in Problems 45.5 and 45.6, what is N/N₀ after 20 years?

Problems 45.5

Cobalt-60 (60Co) is often used as a radiation source in medicine. It has a half-life of 5.25 years. How long after a new sample is delivered will its activity have decreased

(a) To about one-eighth its original value?

(b) To about one-third its original value? Give your answers to two significant figures.

Problems 45.6

Solve Problem 45.5(b) by using the exponential function.

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Authors: Eugene Hecht

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Question Posted: Nov 03, 2023 11:26 PM

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For the situation described in Problems 45.5 and 45.6, what is N/N 0 after 20 years? Problems

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