Exam (elaborations)
PHSC 211 Chapter 6 Quiz (Fall 2020) – Liberty University (A grade)
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PHSC 211 Chapter 6 Quiz (Fall 2020) – Liberty University (A grade) 10. After 3 half-lives, how much of a radioactive material should still be present? a. 87% b. 75% c. 25% d. 13% ans d 11. How many half-lives have passed if a sample has 87.5% of its original radioactive material? a. 0.25 b. 0.5 c. 1 d. 2 ans a Chapter 6 12. How many half-lives have passed if a sample has 50% of its original radioactive material? a. 0.25 b. 0.5 c. 1 d. 2 ans c 13. How many half-lives have passed if a sample has 25% of its original radioactive material? a. 0.5 b. 1 c. 2 d. 3 ans c
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Institution
Liberty University
Course
PHSC (PHSC211)
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Written for
- Institution
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Liberty University
- Course
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PHSC (PHSC211)
Document information
- Uploaded on
- September 20, 2021
- Number of pages
- 7
- Written in
- 2020/2021
- Type
- Exam (elaborations)
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- Questions & answers
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a geologist observes two sandstones on opposite sides of a mountain belt he notes that both are made of quartz with a small amount of mica
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and both show cross bedding
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when working among a group of
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