Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 8, Problem 2Q
To determine
The formation of carbon atoms.
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Meihui is at NASA analyzing Moon rocks. In one of the rocks from the lunar highlands, he discovered 49 % of the original uranium-238 remains, while remaining amount of uranium-238 had decayed into lead. The half life of uranium-238 is 4.5 × 109 years. Assume the only decay product is lead. How old is the lunar maria rock in billions of years (109 years)?
You analyze a sample of a meteorite that landed on Earth and find that
7/8
of the uranium-238 radioactive atoms have decayed into lead-206. What is the age of the sample (in years) if the half-life of uranium-238 is 4.5 billion years?
a parent isotope has a half-life of 500,000 years. if a rock contained 10mg of the parent isotope when it formed, how much parent isotope would be left after 1.5 million years?
Chapter 8 Solutions
Universe: Stars And Galaxies
Ch. 8 - Prob. 1QCh. 8 - Prob. 2QCh. 8 - Prob. 3QCh. 8 - Prob. 4QCh. 8 - Prob. 5QCh. 8 - Prob. 6QCh. 8 - Prob. 7QCh. 8 - Prob. 8QCh. 8 - Prob. 9QCh. 8 - Prob. 10Q
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- What produced the iron and heavier elements such as gold and silver in Earths core and crust?arrow_forwardOne of the fossilized remains of the Taong Tabon you found contains 153 grams of Carbon-14 at time t = 0. If the half-life of Carbon-14 is 5 730 years, how much Carbon-14 remains after 500 years?arrow_forwardThe half-life of carbon-14 is 5,730 years. Suppose a fossil is found with 30 percent as much of its carbon -14 as compared to a living sample. How old is the fossil?arrow_forward
- A sample of carbon-14 has a mass of 2.0 × 10–6 g. Carbon-14 has a half-life of 6000 years. How much carbon-14 will be left after 24 000 years? How would I sovle this?arrow_forwardA sample from a meteorite that landed on Earth has been analyzed, and the result shows that out of every 1,000 nuclei of potassium-40 originally in the meteorite, only 250 are still present, meaning they have not yet decayed. How old is the meteorite (in yr)? (Hint: See the figure below.) (Note: The half-life of potassium-40 is 1.3 billion years.) Figure A graph and a series of bar charts above it both show the percentage of radioactive atoms remaining in a mineral sample. Detailed descriptions of the graph and the bar charts are available in the adjacent lists.arrow_forwardWhat is the difference between the process of condensation and the process of accretion?arrow_forward
- A radioactive nucleus has a half-life of 5108 years. Assuming that a sample of rock (say, in an asteroid) solidified right after the solar system formed, approximately what fraction of the radioactive element should be left in the rock today?arrow_forwardDescribe how we use radioactive elements and their decay products to find the age of a rock sample. Is this necessarily the age of the entire world from which the sample comes? Explain.arrow_forwardName three locations in our Solar System to search for Earth-like life and explain your choices.arrow_forward
- Given that the half-life of carbon-14 is 5,730 years. Consider a sample of fossilized wood that when alive, would have contained 24 gm of carbon-14. It now contains 1.5 gm of carbon-14. How old is the sample?arrow_forwardWHAT DO YOU MEAN BY EVERYTHING IS MADE OF SOMETHING.arrow_forwardAll I need help with is to find the outer core and inner core percentage and the thinkness of them too.arrow_forward
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