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Principles of Physics: A Calculus-Based Text
5th Edition
ISBN: 9781133104261
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 30, Problem 9OQ
To determine
The fraction of a sample remains undecayed after two weeks.
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The barium isotope 133Ba has a half-life of 10.5 years. A sample begins with 1.0 × 1010 133Ba atoms. How many are left after (a) 2 years, (b) 20 years, and (c) 200 years?
Radioactive element AA can decay to either element BB or element CC.The decay depends on chance, but the ratio of the resulting number of BB atoms to the resulting number of CC atoms is always 2/1.The decay has a half-life of 8.00 days.We start with a sample of pure AA. How long must we wait until the number of CC atoms is 1.50 times the number of AAatoms?
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(a) 10 minutes
(b) 20 minutes
(c) 30 minutes
(d) 40 minutes
Chapter 30 Solutions
Principles of Physics: A Calculus-Based Text
Ch. 30.1 - Prob. 30.1QQCh. 30.1 - Prob. 30.2QQCh. 30.3 - Prob. 30.3QQCh. 30.3 - Suppose you have a pure radioactive material with...Ch. 30.4 - Which of the following is the correct daughter...Ch. 30.4 - Which of the following is the correct daughter...Ch. 30 - Prob. 1OQCh. 30 - Prob. 2OQCh. 30 - Prob. 3OQCh. 30 - Prob. 4OQ
Ch. 30 - Prob. 5OQCh. 30 - Prob. 6OQCh. 30 - Prob. 7OQCh. 30 - Prob. 8OQCh. 30 - Prob. 9OQCh. 30 - Prob. 10OQCh. 30 - Which of the following quantities represents the...Ch. 30 - Prob. 12OQCh. 30 - Prob. 1CQCh. 30 - Prob. 2CQCh. 30 - Prob. 3CQCh. 30 - Prob. 4CQCh. 30 - Prob. 5CQCh. 30 - Prob. 6CQCh. 30 - Prob. 7CQCh. 30 - If no more people were to be born, the law of...Ch. 30 - Prob. 9CQCh. 30 - Prob. 10CQCh. 30 - Prob. 11CQCh. 30 - What fraction of a radioactive sample has decayed...Ch. 30 - Prob. 13CQCh. 30 - Prob. 14CQCh. 30 - Prob. 15CQCh. 30 - Prob. 16CQCh. 30 - Prob. 17CQCh. 30 - Prob. 1PCh. 30 - Prob. 2PCh. 30 - Prob. 3PCh. 30 - Prob. 4PCh. 30 - Prob. 5PCh. 30 - Prob. 6PCh. 30 - Prob. 7PCh. 30 - Prob. 8PCh. 30 - Prob. 9PCh. 30 - Prob. 10PCh. 30 - Prob. 11PCh. 30 - Prob. 12PCh. 30 - Prob. 13PCh. 30 - Prob. 14PCh. 30 - Prob. 16PCh. 30 - Prob. 17PCh. 30 - Prob. 18PCh. 30 - What time interval elapses while 90.0% of the...Ch. 30 - Prob. 20PCh. 30 - Prob. 21PCh. 30 - Prob. 22PCh. 30 - Prob. 23PCh. 30 - Prob. 24PCh. 30 - Prob. 25PCh. 30 - Prob. 26PCh. 30 - Prob. 27PCh. 30 - Prob. 28PCh. 30 - Prob. 29PCh. 30 - Prob. 30PCh. 30 - Prob. 31PCh. 30 - Prob. 32PCh. 30 - Prob. 33PCh. 30 - Prob. 34PCh. 30 - Prob. 35PCh. 30 - Prob. 36PCh. 30 - Prob. 37PCh. 30 - Prob. 38PCh. 30 - Prob. 39PCh. 30 - Prob. 41PCh. 30 - Prob. 42PCh. 30 - Prob. 43PCh. 30 - Prob. 45PCh. 30 - Prob. 46PCh. 30 - Prob. 47PCh. 30 - Prob. 48PCh. 30 - Prob. 49PCh. 30 - Prob. 50PCh. 30 - Prob. 51PCh. 30 - Prob. 52PCh. 30 - Prob. 53PCh. 30 - Prob. 54PCh. 30 - Prob. 55PCh. 30 - Prob. 56PCh. 30 - Prob. 57PCh. 30 - Prob. 58PCh. 30 - Prob. 59PCh. 30 - Prob. 60PCh. 30 - Prob. 61PCh. 30 - Prob. 62PCh. 30 - Prob. 63PCh. 30 - Prob. 64PCh. 30 - Prob. 65PCh. 30 - Prob. 66PCh. 30 - Prob. 67PCh. 30 - Prob. 68PCh. 30 - Prob. 69PCh. 30 - Prob. 70P
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Suppose you have a pure radioactive material with a half-life of T1/2. You begin with N0 undecayed nuclei of the material at t = 0. At t=12T1/2, how many of the nuclei have decayed? (a) 14N0 (b) 12N0(C) 34N0 (d) 0.707N0 (e) 0.293N0arrow_forwardA radioactive sample initially contains 2.40102 mol of a radioactive material whose half-life is 6.00 h. How many moles of the radioactive material remain after 6.00 h? After 12.0 h? After 36.0 h?arrow_forwardWhat fraction of a radioactive sample has decayed after two half-lives have elapsed?arrow_forward
- No stable nuclides exist that have Z greater than ___. (10.3)arrow_forwardRadon-222 decays at a continuous rate of 17.3% per day. Suppose a scientist begins with a sample of 460 mg of Radon-222. How much will remain in 12 days? Round answer to 5 decimal places.arrow_forwardA pure sample of 226 Ra contains 2.0 x 10^14 atoms of the isotope. If the half life of. 226 Ra = 1.6 x 10^3 years, what is the decay rate of this sample?arrow_forward
- You are experimenting with a radioactive sample of polonium. At the end of 14.0 minutes, exactly 1/16 of the polonium remains. The corresponding half-life, T2 , of polonium is: a. 0.875 minutes. b. 1.14 minutes. c. 1.75 minutes. d. 3.50 minutes. e. 4.67 minutes.arrow_forwardThe cadmium isotope 109Cd has a half-life of 462 days. A sample begins with 1.0 × 1012 109Cd atoms. How many are left after (a) 50 days, (b) 500 days, and (c) 5000 days?arrow_forwardQuestion 1. Tritium has a half - life of 12.33 years. What fraction of the nuclei in a tritium sample will remain (a) after 5.00 yr? (b) after 10.0 yr? (с) after 123.3 yг?arrow_forward
- The half-life of beryllium-7 is about 53.3 days. (a) Determine the decay constant for beryllium-7. (b) What percentage of a sample remains undecayed after two weeks (1.21 ✕ 106 s)?arrow_forwardThe number of radioactive nuclei present at the start of an experiment is 5.38 × 10¹5. The number present twenty days later is 5.02 × 10¹4. What is the half-life (in days) of the nuclei?arrow_forwardThe half-life of radon-222 is about 3.823 days. (a) Determine the decay constant for radon-222. 2.1x10-65-¹ ✓ (b) What percentage of a sample remains undecayed after two weeks (1.21 x 106 s)? %arrow_forward
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