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 27, Problem 9Q
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Charan is at NASA analyzing Moon rocks. In one of the rocks from the lunar highlands, he discovered 37 % 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)?
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Chapter 27 Solutions
Universe: Stars And Galaxies
Ch. 27 - Prob. 1QCh. 27 - Prob. 2QCh. 27 - Prob. 3QCh. 27 - Prob. 4QCh. 27 - Prob. 5QCh. 27 - Prob. 6QCh. 27 - Prob. 7QCh. 27 - Prob. 8QCh. 27 - Prob. 9QCh. 27 - Prob. 10Q
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- Some rocket scientists are calling for nuclear fission rockets for a Mars Mission. What are their advantages and disadvantages? What’s wrong with a chemical rocket for a Mars mission?arrow_forwardis there any data missing here? If yes,Let me know.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_forward
- Imagine you are a scientist and you are working with a museum on an archaeology exhibit. They tell you that they have an ancient leaf they believe to be 24,000 years old. You use radiocarbon dating and discover that the leaf contains 1/32 of the carbon-14 of a living plant. What do you tell the museum?(half life of 14-carbon = 6000 years)arrow_forwardXavier is at NASA analyzing Moon rocks. In one of the rocks from the lunar Maria, he discovered 80% 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 x 109 years. Assume the only decay product is lead. How old is the lunar Maria rock in billions of years (109 years) ?arrow_forwardA fossil contains 4.06 grams of carbon 14. Refer to the formulaA(t) = C 0.999879t which gives the original amount of carbon 14 t years ago in terms of the amount C that is left now, and estimate the amount of carbon 14 in the sample 10,000 years, 20,000 years, and 30,000 years ago. (Round your answers to one decimal place.arrow_forward
- Using the differential equation model: (dN/dt) = -kN. (k>0) where N(t) = amount of 14C at time t, approximately how old is a fossil with 17 g of 14C if it initially possessed 45 g of ¹4c? (Note: assume half life of 14C to be 5700 years) Choose All Correct Answers Below (A) 7650 years B) 8005 years C) 5792 years D 9430 years 1012 years 9622 yearsarrow_forwardWhat kind of evidence do you think would convince astronomers that an extraterrestrial spacecraft has landed on Earth?arrow_forwardThe radioactive potassium-40 isotope decays to argon-40. A 2.97 x 10^9 year old sample of moon rock was found to contain 18% potassium-40 and 82% argon-40 by mass. Calculate the half-life of potassium-40 isotope.arrow_forward
- The half-life of Carbon-13 is 5750 years. Samples taken at an excavation site show that a one-kilogram sample has 65% Carbon-13 as compared to a normal sample. What is the age of the sample?arrow_forwardOne of the isotopes used for PET scans is oxygen -15, a positron emitter. What new element is formed when oxygen-15 decays?arrow_forward01 Bir beyzbol sopas na çarpan beyzbol topu için tahmini kuvvet-zaman eğrisi şekilde gösterilmiştir. Bu eğriden, topa uygulanan ortalama kuwet nedir? F(N) F=20000N 20 000 15 000 10 000 15 - 5 000 1(ms) 2 O A) 10 kN O B) 16 kN O 9 12 kN O D 20 kN O E 15KN o oarrow_forward
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