For questions 69-70, consider the following: Uranium (45°U) decays to lead (20 Pb) with a half-life of 700 million years. For simplicity, you can assume that there were no lead atoms of this specific isotope in the rock when it originally formed. 69. If you obtained a sample of a meteorite and determined the abundances of 238U and 207 pPb in it, and found that for every one uranium atom there were fifteen lead atoms, what would be the age of this rock? A. 10.5 billion years B. 2.8 billion years C. 4.0 billion years D. 1.4 billion years E. 3.6 billion years
For questions 69-70, consider the following: Uranium (45°U) decays to lead (20 Pb) with a half-life of 700 million years. For simplicity, you can assume that there were no lead atoms of this specific isotope in the rock when it originally formed. 69. If you obtained a sample of a meteorite and determined the abundances of 238U and 207 pPb in it, and found that for every one uranium atom there were fifteen lead atoms, what would be the age of this rock? A. 10.5 billion years B. 2.8 billion years C. 4.0 billion years D. 1.4 billion years E. 3.6 billion years
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:For questions 69-70, consider the following:
Uranium (°U) decays to lead (20 Pb) with a
half-life of 700 million years. For simplicity, you can
238
assume that there were no lead atoms of this specific
isotope in the rock when it originally formed.
69. If you obtained a sample of a meteorite and
determined the abundances of 238U and
in it, and found that for every one uranium atom
there were fifteen lead atoms, what would be
the age of this rock?
A. 10.5 billion years
B. 2.8 billion years
C. 4.0 billion years
D. 1.4 billion years
E. 3.6 billion years
70. If you obtained a sample of rock from Venus
and determined the abundances of U and
Pb in it, and found that for every
one uranium atom there were three lead atoms,
what
A. 2.8 billion years
B. 10.5 billion years
C
14billion vears
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