Foundations of Astronomy (MindTap Course List)
14th Edition
ISBN: 9781337399920
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 18, Problem 4LTL
To determine
The mineral specimen with the correct ratio of red and blue dots after three more half lives have passed.
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A 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 125 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
Graph
Bar charts
A mineral sample
containing radioactive
atoms :, which decay
into daughter atoms
100
Percentage of
radioactive and
daughter atoms
in the mineral
50
100
Percentage of
-radioactive atoms
remaining
Age in half-lives
yr
Percentage remaining
A 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 125 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
Graph
Bar charts
A mineral sample
containing radioactive
atoms :, which decay
into daughter atoms ::
100
Percentage of
radioactive and
50
daughter atoms
in the mineral
100
Percentage of
50
-radioactive atoms
remaining
2
3
Age in half-lives
yr
Percentage remaining
:---1/2 remain----ER
1/4 remain---- ---:
1/8 remain-------
A 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.
Chapter 18 Solutions
Foundations of Astronomy (MindTap Course List)
Ch. 18 - Why was the nebular hypothesis never fully...Ch. 18 - What produced the helium now present in the Suns...Ch. 18 - What produced the iron and heavier elements such...Ch. 18 - Prob. 4RQCh. 18 - What evidence can you give that disks of gas and...Ch. 18 - Why is the solar nebula theory considered a theory...Ch. 18 - According to the solar nebula theory, why is...Ch. 18 - According to the solar nebula theory, why is there...Ch. 18 - Why does the solar nebula theory predict that...Ch. 18 - What evidence can you give that the Solar System...
Ch. 18 - What planet in the Solar System is larger than the...Ch. 18 - Why is almost every solid surface in the Solar...Ch. 18 - What is the difference between condensation and...Ch. 18 - Why dont Terrestrial planets have ring systems...Ch. 18 - How does the solar nebula theory help you...Ch. 18 - Prob. 16RQCh. 18 - If rocks obtained from the Moon indicate an age of...Ch. 18 - Which is older, the Moon or the Sun? How do you...Ch. 18 - How does the solar nebula theory explain the...Ch. 18 - Did hydrogen gas condense from the nebula as the...Ch. 18 - What happens if a planet has differentiated? Would...Ch. 18 - Order the following steps in the formation of a...Ch. 18 - Which step(s) listed in the previous question can...Ch. 18 - Describe two processes that could melt the...Ch. 18 - What is the evidence that Jupiter and Saturn are...Ch. 18 - Describe two processes that cleared the solar...Ch. 18 - What is the difference between a planetesimal and...Ch. 18 - Does Uranus have enough mass to have formed by...Ch. 18 - What properties of the gas and dust disks observed...Ch. 18 - Why would the astronomically short lifetime of gas...Ch. 18 - Prob. 31RQCh. 18 - Describe three methods to find extrasolar planets.Ch. 18 - Why is the existence of hot Jupiters puzzling?...Ch. 18 - The evidence is overwhelming that the Grand Canyon...Ch. 18 - Prob. 35RQCh. 18 - If you observed the Solar System from the vantage...Ch. 18 - Venus can be as bright as apparent magnitude 4.7...Ch. 18 - What is the smallest-diameter crater you can...Ch. 18 - Prob. 4PCh. 18 - Prob. 5PCh. 18 - You analyze a sample of a meteorite that landed on...Ch. 18 - You analyze a sample of a meteorite that landed on...Ch. 18 - Prob. 8PCh. 18 - Examine Table 18-2. What might a planets...Ch. 18 - Examine Table 18-2. What might a planets...Ch. 18 - Suppose that Earth grew to its present size in 10...Ch. 18 - Prob. 12PCh. 18 - Prob. 13PCh. 18 - Prob. 1SOPCh. 18 - Prob. 2SOPCh. 18 - What do you see in this image that indicates this...Ch. 18 - Why do astronomers conclude that the surface of...Ch. 18 - Prob. 3LTLCh. 18 - Prob. 4LTL
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- 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_forwardA sample from a meteorite that landed on Earth has been analyzed, and the results shows that out of every 1,000 nuclei of potassium- 40 originally in the meteorite, only 125 are still present, meaning they have no 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.) _______ yrarrow_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.)arrow_forward
- Potassium has a radioactive isotope, K-40, with a half-life of 1.25 billion years, and a natural abun- dance of 0.012% (120 parts per million). Sea-water contains about 380 ppm of potassium (0.38 grams per litre), essential for life. Calculate the radioactivity of sea-water due to the potassium, giving your answer in Bq m -3arrow_forwardif the amount of the parent isotope in the original sample of a rock had been 48 grams, about how much would have been left after three half-lives?arrow_forwardIf the half-life of a radioactive specimen is 100 years, then how long will it take for the specimen to reach 25% of its original amount? (24.3) (a) 25 years (b) 50 years (c) 100 years (d) 200 yearsarrow_forward
- Consider the differentiated meteorites. We think the irons are from the cores, the stony-irons are from the interfaces between mantles and cores, and the stones are from the mantles of their differentiated parent bodies. If these parent bodies were like Earth, what fraction of the meteorites would you expect to consist of irons, stony-irons, and stones? Is this consistent with the observed numbers of each? (Hint: You will need to look up what percent of the volume of Earth is taken up by its core, mantle, and crust.)arrow_forwardIf a star must remain on the main sequence for at least 4 billion years for life to evolve to intelligence, what is the most massive a star that can form and still possibly harbor intelligent life on one of its exoplanets? (Hints: Use the formula for stellar life expectancies, Eq. 121, and data in Appendix Table A-7.)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
- What is electroweak epoch?arrow_forwardTaro solid skheres A Co B tave eame oeadius of Å üis four times the seadius of 8 eg tempesrativre R B. The seatio cof the seate of feat se'seadiated hom A to that emistirity.The '& A is tewice the tempratevrearrow_forward- Life x S HW 18-2 w NWP Assessment Player Ul Appli x on.wiley.com/was/ui/v2/assessment-player/index.html?launchld 4368ed39-f195-462d-a6ef-6b156bd84883#/question/3 Wa. O YouTube Maps M Gmail Question 4 of 6 0.2/2 Your answer is partially correct. The drawing shows an equilateral triangle, each side of which has a length of 4.25 cm. Point charges are fixed to each corner, as shown. The 4.00 UC charge experiences a net force due to the charges qa and qg. This net force points vertically downward and has a magnitude of 568 N. Determine (a) charge qa. (b) charge qg. +4.00 C (a) Number -1.99E+7 Units (b) Number -1.99E+7 Units re to search O N O 59°F O 40 G DELL F3 F5 F6 F7 F8 F9 F10 F11 F12 PrtScr Insert Delete Po 23 2$ & ) Backspace 3 6 8 E T. Y. U --- IIIarrow_forward
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