EBK COLLEGE PHYSICS
3rd Edition
ISBN: 9780321989246
Author: Knight
Publisher: PEARSON CO
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Question
Chapter 30, Problem 30P
(a)
To determine
The number of barium atoms left after 2 years.
(b)
To determine
The number of barium atoms left after 20 years.
(c)
To determine
The number of barium atoms left after 200 years.
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Students have asked these similar questions
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?
A certain radioactive material decays exponentially. The percent, P, of the
material left after t years is given by P(t) = 100(1.2).
a. Determine the half-life of the substance.
b. How fast is the substance decaying at the point where the half-life is reached?
The substance is decaying at a rate of about -3.8% per year at the time 9.12 years where the
half-life is reached
The substance is decaying at a rate of about -9.12% per year at the time 6.8 years where the
half-life is reached
The substance is decaying at a rate of about -9.12% per year at the time 3.8 years where the
half-life is reached |
None of the above
Chapter 30 Solutions
EBK COLLEGE PHYSICS
Ch. 30 - Prob. 1CQCh. 30 - Prob. 2CQCh. 30 - Prob. 3CQCh. 30 - Prob. 4CQCh. 30 - Prob. 5CQCh. 30 - Prob. 6CQCh. 30 - Figure Q30.7 shows how the number of nuclei of one...Ch. 30 - Prob. 8CQCh. 30 - Prob. 9CQCh. 30 - Prob. 10CQ
Ch. 30 - The material that formed the earth was created in...Ch. 30 - Prob. 12CQCh. 30 - Prob. 13CQCh. 30 - Prob. 14CQCh. 30 - Prob. 15CQCh. 30 - Prob. 16CQCh. 30 - Prob. 17CQCh. 30 - Prob. 18CQCh. 30 - Prob. 19CQCh. 30 - Prob. 20CQCh. 30 - Prob. 21CQCh. 30 - Prob. 22CQCh. 30 - Prob. 23CQCh. 30 - Some types of MRI can produce images of resolution...Ch. 30 - Prob. 25CQCh. 30 - The first two letters in the acronym SPECT, which...Ch. 30 - Prob. 27CQCh. 30 - Prob. 28CQCh. 30 - Prob. 29MCQCh. 30 - Prob. 30MCQCh. 30 - Prob. 31MCQCh. 30 - Prob. 32MCQCh. 30 - Prob. 33MCQCh. 30 - Prob. 34MCQCh. 30 - Prob. 35MCQCh. 30 - Prob. 36MCQCh. 30 - Prob. 37MCQCh. 30 - Prob. 38MCQCh. 30 - Prob. 1PCh. 30 - Prob. 2PCh. 30 - Prob. 3PCh. 30 - Prob. 4PCh. 30 - Prob. 5PCh. 30 - The chemical atomic mass of hydrogen, with the two...Ch. 30 - Prob. 7PCh. 30 - Prob. 8PCh. 30 - Prob. 9PCh. 30 - Prob. 10PCh. 30 - Prob. 11PCh. 30 - Prob. 12PCh. 30 - Prob. 13PCh. 30 - a. Compute the binding energy of the reactants and...Ch. 30 - a. Compute the binding energy of the reactants and...Ch. 30 - Prob. 16PCh. 30 - Prob. 17PCh. 30 - Prob. 18PCh. 30 - You have seen that filled electron energy levels...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. 40PCh. 30 - Prob. 41PCh. 30 - Prob. 42PCh. 30 - Prob. 43PCh. 30 - Prob. 44PCh. 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. 57GPCh. 30 - Prob. 58GPCh. 30 - Prob. 59GPCh. 30 - Prob. 60GPCh. 30 - Prob. 61GPCh. 30 - Prob. 62GPCh. 30 - Prob. 63GPCh. 30 - Prob. 64GPCh. 30 - Prob. 65GPCh. 30 - Prob. 66GPCh. 30 - Prob. 67GPCh. 30 - Prob. 68GPCh. 30 - Prob. 69GPCh. 30 - Prob. 70MSPPCh. 30 - Prob. 71MSPPCh. 30 - Prob. 72MSPPCh. 30 - What statement can be made about the masses above...Ch. 30 - Prob. 74MSPPCh. 30 - Prob. 75MSPPCh. 30 - Prob. 76MSPP
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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_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_forward
- Copper-63 has a nucleus mass of 62.92959 u. Its atomic number is 29, and its atomic mass number is 63. The mass of a proton is 1.007276 u and the mass of a neutron is 1.008664 u What is the total binding energy of the nucleus? Express your answer in MeV and keep 4 significant digits.arrow_forwardRadioactive substances follow a specific law of decay. Namely, if you have a sample of some radioactive isotope, the quantity left after a certain time, called the half-life and denoted T1/2, is one-half of what you had initially. If you wait a second half-life, then there will be half f what was left at the end of the first half-life. Since 1/2-1/2 = 1/4, you will have one-fourth of the original quantity left after two half-lives. You can continue with this procedure to find the fraction of the original sample that hasn't decayed after any number of half- lives. However, this would become quite cumbersome if you are interested in the quantity left after, say, 10 half-lives. In this case, the quantity you are looking for would be found by multiplying the original quantity by 10 factors or 1/2. To solve this problem, we use exponents. An exponent, a small number written above and to the right, tells you how many copies of a particular number are multiplied together. In our example,…arrow_forwardAn isotope of the element erbium has a half-life of approximately 12 hours. Initially there are 30.1 grams of the isotope present. What is the rate of decay at t = 8.6 hours?arrow_forward
- An isotope of iodine 1311, which has an eight-day half-life, is used in nuclear medicine. A sample of 1311 containing 2.0 0 x 1012 atoms is created in a nuclear reactor. The number of 1311 atoms that remain 36 hours later when the sample is delivered to a hospital is O A. 0.99 × 1012 O B. 2.00 x 1012 OC 1.99 x 1012 O D. 1.76 x 1012arrow_forwardA radioactive nucleus has half-life T1/2. A sample containing these nuclei has initial activity R0. Calculate the number of nuclei that decay during the interval between the times t1 and t2.arrow_forward
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