Inquiry into Physics
8th Edition
ISBN: 9781337515863
Author: Ostdiek
Publisher: Cengage
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Chapter 11, Problem 5Q
To determine
To explain:
Two nuclei have different mass number are the isotopes of same element or not.
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I am specifically having difficulty in solving part d of this problem.
a) Calculate the number of grams of deuterium in a 54,300 L swimming pool, given deuterium is 0.0150% of natural hydrogen.
(b)
Find the energy released in joules if this deuterium is fused via the reaction 2H + 2H → 3He + n.
(c)
Could the neutrons be used to release more energy?
(d)
Discuss the amount of this type of energy in a swimming pool as compared to that in, say, a gallon of gasoline, also taking into consideration that water is far more abundant. (Enter the ratio of the energy in the deuterium in the pool to the energy in a gallon of gasoline. The energy in a gallon of gasoline is 1.2 ✕ 108 J.)
Edeuterium
Egasoline
=
Hello please someone help me answer this problem set, thank you!
Part A:
A particular smoke detector contains 1.05 μCi of 241Am241Am, with a half-life of 458 years. The isotope is encased in a thin aluminum container. Calculate the mass of 241 Am in grams in the detector.
Express your answer numerically in grams.
Part B:
Fears of radiation exposure from normal use of such detectors are largely unfounded. Identify reasons why 241 Am smoke detectors are perfectly safe.
Select all that apply
a. The penetrating power of αα radiation is limited.
b. Ions get trapped by electrodes.
c. The amount of americium is very little.
d. The number of αα particles leaving the case is low.
e. The detector has a plastic cover.
f. The detector is housed in an aluminum case.
15O and 131I are isotopes used in medical imaging. 15O is a beta-plus emitter, 131I is a beta-minus emitter. What are the daughter nuclei of the two decays? Express your answers as isotopes separated by a comma. Enter your answer using the number in superscript in front of the element.
Chapter 11 Solutions
Inquiry into Physics
Ch. 11 - Prob. 1MACh. 11 - Prob. 1PIPCh. 11 - Prob. 2PIPCh. 11 - Prob. 1MIOCh. 11 - Prob. 1QCh. 11 - Prob. 2QCh. 11 - Prob. 3QCh. 11 - Prob. 4QCh. 11 - Prob. 5QCh. 11 - Prob. 6Q
Ch. 11 - Prob. 7QCh. 11 - Prob. 8QCh. 11 - Prob. 9QCh. 11 - Prob. 10QCh. 11 - Prob. 11QCh. 11 - Prob. 12QCh. 11 - Prob. 13QCh. 11 - Prob. 14QCh. 11 - Prob. 15QCh. 11 - Prob. 16QCh. 11 - Prob. 17QCh. 11 - Prob. 18QCh. 11 - Prob. 19QCh. 11 - Prob. 20QCh. 11 - Prob. 21QCh. 11 - Prob. 22QCh. 11 - Prob. 23QCh. 11 - Prob. 24QCh. 11 - Prob. 25QCh. 11 - Prob. 26QCh. 11 - Prob. 27QCh. 11 - Prob. 28QCh. 11 - Prob. 29QCh. 11 - Prob. 30QCh. 11 - Prob. 31QCh. 11 - Prob. 32QCh. 11 - Prob. 33QCh. 11 - Determine the nuclear composition (number of...Ch. 11 - The isotope helium-6 undergoes beta decay. Write...Ch. 11 - Prob. 3PCh. 11 - A nucleus of oxygen-15 undergoes electron capture....Ch. 11 - Prob. 5PCh. 11 - Prob. 6PCh. 11 - Prob. 7PCh. 11 - Prob. 8PCh. 11 - Prob. 9PCh. 11 - Prob. 10PCh. 11 - Prob. 11PCh. 11 - Prob. 12PCh. 11 - . A Geiger counter registers a count rate of 4,000...Ch. 11 - Prob. 14PCh. 11 - Prob. 15PCh. 11 - Prob. 16PCh. 11 - Prob. 17PCh. 11 - Prob. 18PCh. 11 - Prob. 19PCh. 11 - Prob. 20PCh. 11 - Prob. 21PCh. 11 - Prob. 22PCh. 11 - Prob. 1CCh. 11 - Prob. 2CCh. 11 - Prob. 3CCh. 11 - Prob. 4CCh. 11 - Prob. 5CCh. 11 - Prob. 6CCh. 11 - Prob. 7C
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- Enter the correct nuclide symbol in each open tan rectangle in Figure P43.25, which shows the sequences of decays in the natural radioactive series starting with the long-lived isotope uranium-235 and ending with the stable nucleus lead-207. Figure P43.25arrow_forwardA nuclear physicist finds 1.0of 236Uin a piece of uranium ore (T1/2=2.348107y) . (a) Use die decay law to determine how much 236Uwould had to have been on Earth when it formed 4.543109yago for 1.0gto be left today, (b) What is unreasonable about this result? (c) How is this unreasonable result resolved?arrow_forwardShow the complete solution. Kindly, include the necessary table of values. 1. Initially, there is 50 mg of a certain radioactive material present and after 2 hours, it is observed that the material has lost 10 % of its original mass. Find: a. the mass of the material after 4 hours b. the time at which the mass has decayed to one–half of its initial mass (half–life of the material)arrow_forward
- The mass defect for potassium-40 is: -___x10-28kg. (Give your answer with 3 sig digs and do not include units) Use mass of proton = 1.007276 u mass of neutron = 1.008665 u actual mass = 39.9687 uarrow_forwardNuclear decay can be useful. Generally, the radiation interacts with other matter in a specific way. Consider the following items: (c) tritium gas in vials on watch dials and hands For the above example, provide: the correct symbol (with atomic number and mass number) of the element used. A balanced equation that describes the decay that takes place. How the radiation interacts with matter in a way that provides a benefit.arrow_forwardPlease help. This problem involves finding the amount of deuterium needed to generate a certain amount of energy. Thank you.arrow_forward
- Hello again. I have a final exam and there are 7 questions. I could not do. I asked my first question and I taked its answer. Then I ask you second question . This question is bonded the first question. This first question that is answered. The mass difference between two isotopes is sometimes just a neutron mass. The spectrometer should separate them very well. For such an isotope combination, the difference in radius should be around 1 cm. That is r2 - r1 = 1 cm. In order to achieve this, choose a magnetic field with a magnitude in Tesla (maximum magnetic field you can obtain from a conventional magnet is around 2.5 T so be far away from this value) and choose the direction also. Then determine the velocity of isotope you need. Last calculate radius r of a Pb204 ^(-) smallest isotope. And this is my second question In order to produce this magnetic field, determine the current and number of turns, radius and other parameters of a solenoid you need. Also show how you will position…arrow_forwardA certain radioactive isotope has a decay constant of 0.00324 s-1. 1) Find the half-life in seconds. (Express your answer to three significant figures.) 2) Find the half-life in days. (Express your answer to three significant figures.)arrow_forwardWhat is the activity of a sample of C that contains 6.7x1020 nuclei? The half-life of C is 5700 years. Express your answer using two significant figures. Tearrow_forward
- An 1 g sample of a radioactive element takes 83.92 million years to reduce into 1 µg. Calculate the half-life and identify the element.arrow_forwardQ2(C). Use A(t )= A0ekt to determine how much of a 100-g sample is present after 250 years if the half-life of Uranium-232 is 68.9 years.arrow_forwardAn accident at a nuclear power plant has left the surrounding area polluted with radioactive material that decays naturally. The initial amount of radioactive material present is 42 su (safe units), and 5 months later it is still 31 su. a.) write a formula giving the amount A(t) of radioactive material (in su) remaining after t months. (Use integers or decimals for any numbers in the expression. Round to three decimal places needed.) b.) what amount of radioactive material will remain after 11 months? c.) how long will it be until A = 1 su, so it is safe for people to return to the area?arrow_forward
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