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# Radon gas in the form of 222Rn is a health hazard becauseit is a gas that occurs as a

ISBN: 9781133103721 454

## Solution for problem 67 Chapter 12

Modern Physics for Scientists and Engineers | 4th Edition

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Problem 67

Radon gas in the form of 222Rn is a health hazard becauseit is a gas that occurs as a result of one of thenaturally occurring radioactive decay chains. It tends tocollect in basements and can be inhaled by humans.(a) Which decay chain produces this isotope of radon?(b) Show that 222Rn produces fi ve more disintegrationsbefore a stable isotope is reached. (c) Choose one ofthe paths of the decay chain from 222Rn to the stableisotope and sum the half-lives. Approximate the numberof days it would take for more than half these decaysto occur for a given amount of radon.

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Calculus: Early Transcendental Functions : Exponential and Logarithmic Functions
?Evaluating an Expression In Exercises 1 and 2, evaluate the expressions. (a) $$25^{3 / 2}$$ (b) $$81^{1 / 2}$$ (c) $$3^{-2} Calculus: Early Transcendental Functions : Product and Quotient Rules and Higher-Order Derivatives ?Using the Product Rule In Exercises 1–6, use the Product Rule to find the derivative of the function. \(f(x)=e^{x} \cos x$$

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