Explanation Write the expression for the decay constant. λ = t t 1 2 (I) Here, λ is the decay constant, t 1 2 is the half-life and t is the total life. Write expression for the potassium left un-decayed after time t . f = ( 1 2 ) λ (II) Here, f is fraction remain after half-life. Write the expression for the present composition of natural potassium. K ( % ) = f c o (III) Here, K ( % ) is the present amount of natural potassium and c o is the initial amount of natural potassium when earth was formed. Conclusion: Substitute 4.5 billion for t and 1.3 billion for t 1 2 in Equation (I) to calculate λ

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ISBN: 9780134988566

Author: Wolfson, Richard

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Question

Chapter 38, Problem 47P

To determine

The percentage of natural potassium when Earth formed.

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Chapter 38, Problem 46P

Chapter 38, Problem 48P

Chapter 38 Solutions

Essential University Physics

Ch. 38.1 - Prob. 38.1GI Ch. 38.2 - Prob. 38.2GI Ch. 38.3 - Prob. 38.3GI Ch. 38.4 - Prob. 38.4GI Ch. 38.5 - Prob. 38.5GI Ch. 38 - Prob. 1FTD Ch. 38 - Prob. 2FTD Ch. 38 - Prob. 3FTD Ch. 38 - Prob. 4FTD Ch. 38 - Why are iodine-131 and strontium-90 particularly...

Ch. 38 - Prob. 6FTD Ch. 38 - Prob. 7FTD Ch. 38 - Prob. 8FTD Ch. 38 - Prob. 9FTD Ch. 38 - Prob. 10FTD Ch. 38 - Three radon isotopes have 125, 134, and 136...Ch. 38 - Prob. 12E Ch. 38 - Prob. 13E Ch. 38 - Prob. 14E Ch. 38 - Prob. 15E Ch. 38 - How many half-lives will it take for the activity...Ch. 38 - Prob. 17E Ch. 38 - Prob. 18E Ch. 38 - Prob. 19E Ch. 38 - Prob. 20E Ch. 38 - Prob. 21E Ch. 38 - Find the total binding energy of oxygen-16, given...Ch. 38 - Determine the nuclear mass of nickel-60, given...Ch. 38 - Prob. 24E Ch. 38 - Prob. 25E Ch. 38 - Prob. 26E Ch. 38 - Prob. 27E Ch. 38 - Prob. 28E Ch. 38 - Prob. 29E Ch. 38 - Prob. 30E Ch. 38 - Prob. 31E Ch. 38 - Prob. 32E Ch. 38 - Prob. 33E Ch. 38 - Prob. 34E Ch. 38 - Prob. 35E Ch. 38 - Prob. 36E Ch. 38 - Prob. 37E Ch. 38 - Prob. 38E Ch. 38 - Prob. 39E Ch. 38 - Prob. 40E Ch. 38 - Prob. 41E Ch. 38 - Prob. 42P Ch. 38 - Prob. 43P Ch. 38 - Prob. 44P Ch. 38 - Iron-56, with nuclear mass 55.9206 u, is among the...Ch. 38 - Prob. 46P Ch. 38 - Prob. 47P Ch. 38 - Prob. 48P Ch. 38 - Prob. 49P Ch. 38 - Nitrogen-13 is a 9.97-min-half-lifc isotope used...Ch. 38 - Prob. 51P Ch. 38 - Prob. 52P Ch. 38 - Prob. 53P Ch. 38 - Prob. 54P Ch. 38 - The table below lists reported levels of...Ch. 38 - Prob. 56P Ch. 38 - Analysis of a Moon rock shows that 82% of its...Ch. 38 - Prob. 58P Ch. 38 - Prob. 59P Ch. 38 - Prob. 61P Ch. 38 - Prob. 62P Ch. 38 - Prob. 63P Ch. 38 - Prob. 64P Ch. 38 - Prob. 65P Ch. 38 - Prob. 66P Ch. 38 - Prob. 67P Ch. 38 - Prob. 68P Ch. 38 - Prob. 69P Ch. 38 - Prob. 70P Ch. 38 - Prob. 71P Ch. 38 - Prob. 72P Ch. 38 - Prob. 73P Ch. 38 - Prob. 74P Ch. 38 - Bismuth-209 and chromium-54 combine to form a...Ch. 38 - Prob. 76P Ch. 38 - Prob. 77P Ch. 38 - Prob. 78P Ch. 38 - Prob. 79P Ch. 38 - Prob. 80P Ch. 38 - Prob. 81P Ch. 38 - Prob. 82P Ch. 38 - Prob. 83P Ch. 38 - Prob. 84P Ch. 38 - Prob. 85P Ch. 38 - Prob. 86PP Ch. 38 - Prob. 87PP Ch. 38 - Prob. 88PP Ch. 38 - Prob. 89PP

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