Loose Leaf For Explorations: Introduction To Astronomy
9th Edition
ISBN: 9781260432145
Author: Thomas T Arny, Stephen E Schneider Professor
Publisher: McGraw-Hill Education
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Chapter 6, Problem 5P
To determine
The minimum age of a sample in which less than
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You want to use radiometric dating to determine the age of a specimen. You use Isotope Z, which has a half-life of 645 years. You measure your sample and find that 1/16 of the original amount of Isotope Z is present. How old is the sample?
A rock sample which originally contained 400 grams of radioactive isotope X now contains 25 grams of the material. The half-life of isotope X is 10,000 years. How old is the rock sample? (Give your answer without any punctuation or lables. For example: 15000).
I need to know the number of years! There is only one part to this question. The pictures show the "Figure" and "Bar charts" tabs and the "Graph" tab says this:
A curve showing the percentage of radioactive atoms remaining in a mineral sample is graphed on a coordinate plane.
The horizontal axis, labeled "Age in half-lives," ranges from 0 to 6.
The vertical axis, labeled "Percentage remaining," ranges from 0 to 100.
The curve enters the viewing field with a negative slope at (0, 100). The magnitude of the negative slope is progressively reduced such that it is nearly horizontal as it exits the viewing field at (6, 0.02).
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Chapter 6 Solutions
Loose Leaf For Explorations: Introduction To Astronomy
Ch. 6 - Prob. 1QFRCh. 6 - Prob. 2QFRCh. 6 - How do we know that Earth has a liquid core? Why...Ch. 6 - Prob. 4QFRCh. 6 - Prob. 5QFRCh. 6 - Prob. 6QFRCh. 6 - Prob. 7QFRCh. 6 - On what plate of the crust are you located? Which...Ch. 6 - Prob. 9QFRCh. 6 - Prob. 10QFR
Ch. 6 - Prob. 11QFRCh. 6 - How does the fact that Earth has a magnetic field...Ch. 6 - Prob. 13QFRCh. 6 - Prob. 14QFRCh. 6 - Prob. 15QFRCh. 6 - Prob. 16QFRCh. 6 - Prob. 17QFRCh. 6 - Prob. 1TQCh. 6 - Submarines contain ballast tanks that can take on...Ch. 6 - According to the Guinness Book of Mountains and...Ch. 6 - Flicking your finger against your cheek makes a...Ch. 6 - How does the eventual acceptance of the plate...Ch. 6 - If Earth rotated more slowly, would you expect it...Ch. 6 - Prob. 7TQCh. 6 - Prob. 8TQCh. 6 - Prob. 9TQCh. 6 - Suppose Earths radius were only half of its real...Ch. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Prob. 5PCh. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 1TYCh. 6 - Prob. 2TYCh. 6 - Prob. 3TYCh. 6 - Prob. 4TYCh. 6 - Prob. 5TYCh. 6 - Prob. 6TYCh. 6 - Prob. 7TYCh. 6 - Prob. 8TYCh. 6 - Prob. 9TYCh. 6 - Prob. 1EQFRCh. 6 - Prob. 2EQFRCh. 6 - Prob. 3EQFRCh. 6 - Prob. 4EQFRCh. 6 - Prob. 5EQFRCh. 6 - Prob. 6EQFRCh. 6 - Prob. 7EQFRCh. 6 - Prob. 1ETQCh. 6 - Prob. 2ETQCh. 6 - Prob. 3ETQCh. 6 - Prob. 4ETQCh. 6 - Prob. 5ETQCh. 6 - Prob. 1EPCh. 6 - Prob. 2EPCh. 6 - Prob. 3EPCh. 6 - Prob. 4EPCh. 6 - Prob. 1ETYCh. 6 - Prob. 2ETYCh. 6 - Prob. 3ETYCh. 6 - Prob. 4ETY
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- Radioactive isotopes can be used to find the age of rocks, fossils, or other artifacts. Carbon-14 has a half-life of 5,730 years. Suppose a sample of charcoal from a primitive fire pit contains one eighth of its original amount of carbon-14. How old is the sample? (Give your answer in units of years)arrow_forwardAn isotope of a radioactive element has half-life equal to 9 thousand years. Imagine a sample that is so old that most of its radioactive atoms have decayed, leaving just 25 percent of the initial quantity of the isotope remaining. How old is the sample? Give your answer in thousands of years, correct to one decimal place.arrow_forwardGiven 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_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 piece of fossilized wood has a carbon-14 radioactivity that is 1/4 that of new wood. The half-life of carbon-14 is 5730 years. How old is the cloth?arrow_forwardThe 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_forward
- Carbon-14 commonly used for dating historical artifacts, is a radioactive isotope that is present in organic materials. Carbon-14 has a half-life of 5730 years. If a bone fragment is found that contains 50% of its original carbon-14,how old is the bone? years (round to the nearest whole number)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_forwardAn isotope of a radioactive element has half-life equal to 5 thousand years. Imagine a sample that is so old that most of its radioactive atoms have decayed, leaving just 20 percent of the initial quantity of the isotope remaining. How old is the sample? Give your answer in thousands of years, correct to one decimal place. Age : ___ thousand years.arrow_forward
- if the half life of uranium 235 is 700 million years and you have 64 atoms of it, how many 700 million year units of time will pass before 1 atom of uranium 235 is left?arrow_forwardA rock sample contains a radioactive isotope that has a half-life of 10,000 years. One-fourth (25%) of the parent isotope remains in a sample. How old is the sample?arrow_forwardA fossilized leaf contains 70% Of its normal amount of carbon- 14. How old is the fossil? Use 5730 yesrs as the half-life of carbon- 14.arrow_forward
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