Physics for Scientists and Engineers with Modern Physics
4th Edition
ISBN: 9780131495081
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Chapter 42, Problem 20Q
To determine
The conditions in the interior of stars to make the fusion process possible.
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10. A nuclear reactor is 35% efficient and has a power output of 350 MW. If we
consider all the fission reactions to give out the same energy, 2.78 x 1011 J
how many moles of uranium-235 is needed each second by the power station?
AA 5.975 x 105
B 5.935 x 105
C 5.835 x 105
D 5.739 x 105
Another series of nuclear reactions that can produce energy in the interior of stars is the carbon cycle first proposed by Hans Bethe in 1939, leading to his Nobel Prize in Physics in 1967. This cycle is most efficient when the central temperature in a star is above 1.6 x 10^7 K. Because the temperature at the center of the Sun is only 1.5 x 10^7 K, the following cycle produces less than 10% of the Sun’s energy.
(a) A high-energy proton is absorbed by 12C. Another nucleus, A, is produced in the reaction, along with a gamma ray. Identify nucleus A.
(b) Nucleus A decays through positron emission to form nucleus B. Identify nucleus B.
(c) Nucleus B absorbs a proton to produce nucleus C and a gamma ray. Identify nucleus C.
(d) Nucleus C absorbs a proton to produce nucleus D and a gamma ray. Identify nucleus D.
(e) Nucleus D decays through positron emission to produce nucleus E. Identify nucleus E.
(f) Nucleus E absorbs a proton to produce nucleus F plus an alpha particle. Identify nucleus…
Scientists have continuously been searching for ways to create a system for energy production through fusion reactions but have
been unsuccessful. Which of the following explains why it is still not a practical source of power?
O Fusion can create a huge amount of energy with very little fuel.
O Fusion radioactive byproducts have a shorter half-life than fission byproducts.
O Fusion requires a large amount of energy to force atoms to initially fuse together.
O Fusion reactions have virtually little to no risk of nuclear accidents.
Chapter 42 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 42.1 - Prob. 1AECh. 42.3 - Prob. 1BECh. 42.4 - Return to the first Chapter-Opening Question, page...Ch. 42.4 - Prob. 1DECh. 42.6 - Prob. 1EECh. 42 - Prob. 1QCh. 42 - Prob. 2QCh. 42 - Prob. 3QCh. 42 - Why are neutrons such good projectiles for...Ch. 42 - Prob. 5Q
Ch. 42 - Prob. 6QCh. 42 - Prob. 7QCh. 42 - Prob. 8QCh. 42 - Prob. 9QCh. 42 - Prob. 10QCh. 42 - Prob. 11QCh. 42 - Why would a porous block of uranium be more likely...Ch. 42 - Prob. 13QCh. 42 - Prob. 14QCh. 42 - Prob. 15QCh. 42 - Prob. 16QCh. 42 - Prob. 17QCh. 42 - Prob. 18QCh. 42 - Prob. 19QCh. 42 - Prob. 20QCh. 42 - Prob. 21QCh. 42 - Prob. 22QCh. 42 - Prob. 23QCh. 42 - Prob. 24QCh. 42 - Prob. 25QCh. 42 - How might radioactive tracers be used to find a...Ch. 42 - Prob. 1PCh. 42 - Prob. 2PCh. 42 - Prob. 3PCh. 42 - Prob. 4PCh. 42 - Prob. 5PCh. 42 - Prob. 6PCh. 42 - Prob. 7PCh. 42 - Prob. 8PCh. 42 - Prob. 9PCh. 42 - Prob. 10PCh. 42 - Prob. 11PCh. 42 - Prob. 12PCh. 42 - Prob. 13PCh. 42 - Prob. 14PCh. 42 - Prob. 15PCh. 42 - Prob. 16PCh. 42 - Prob. 17PCh. 42 - Prob. 18PCh. 42 - (I) What is the effective cross section for the...Ch. 42 - Prob. 20PCh. 42 - Prob. 21PCh. 42 - Prob. 22PCh. 42 - Prob. 23PCh. 42 - Prob. 24PCh. 42 - Prob. 25PCh. 42 - Prob. 26PCh. 42 - Prob. 27PCh. 42 - Prob. 28PCh. 42 - Prob. 29PCh. 42 - Prob. 30PCh. 42 - Prob. 31PCh. 42 - Prob. 32PCh. 42 - Prob. 33PCh. 42 - Prob. 34PCh. 42 - Prob. 35PCh. 42 - Prob. 36PCh. 42 - Prob. 37PCh. 42 - Prob. 38PCh. 42 - Prob. 39PCh. 42 - Prob. 40PCh. 42 - Prob. 41PCh. 42 - Prob. 42PCh. 42 - Prob. 43PCh. 42 - Prob. 44PCh. 42 - Prob. 45PCh. 42 - Prob. 46PCh. 42 - Prob. 47PCh. 42 - Prob. 48PCh. 42 - Prob. 49PCh. 42 - Prob. 50PCh. 42 - Prob. 51PCh. 42 - Prob. 52PCh. 42 - Prob. 53PCh. 42 - Prob. 54PCh. 42 - Prob. 55PCh. 42 - Prob. 56PCh. 42 - Prob. 57PCh. 42 - Prob. 58PCh. 42 - Prob. 59PCh. 42 - Prob. 60PCh. 42 - Prob. 61PCh. 42 - Prob. 62PCh. 42 - Prob. 63PCh. 42 - Prob. 64PCh. 42 - Prob. 65GPCh. 42 - Prob. 66GPCh. 42 - Prob. 67GPCh. 42 - Prob. 68GPCh. 42 - Prob. 69GPCh. 42 - Prob. 70GPCh. 42 - Prob. 71GPCh. 42 - Prob. 72GPCh. 42 - Prob. 73GPCh. 42 - Prob. 74GPCh. 42 - Prob. 75GPCh. 42 - Prob. 76GPCh. 42 - Prob. 77GPCh. 42 - Prob. 78GPCh. 42 - Prob. 79GPCh. 42 - Prob. 80GPCh. 42 - Prob. 81GPCh. 42 - Prob. 82GPCh. 42 - Prob. 83GPCh. 42 - Prob. 84GPCh. 42 - Prob. 85GPCh. 42 - Prob. 86GPCh. 42 - Prob. 87GPCh. 42 - Prob. 88GP
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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
- (a) Calculate the energy released by the fusion of a 1.00-kg mixture of deuterium and tritium, which produces helium. Tire re are equal numbers of deuterium and tritium nuclei in the mixture. (b) If this process takes place continuously over a period of a year, what is the average power output?arrow_forwardWhich of the following quantities represents the reaction energy of a nuclear reaction? (a) (final mass initial mass)/c2 (b) (initial mass final mass)/c2 (c) (final mass initial mass)c2 (d) (initial mass final mass)c2 (e) none of those quantitiesarrow_forwardFor a fusion reaction, at which temperature T do you expect the optimal reaction rate to approximately occur? In the expressions below EG is the Gamow energy of the reaction and k is the Boltzmann constant. Select one: O a. T O b. T: O c. T d. T = Oe. T - - = = EG 100k 10EG k EG 10k EG k 100 EG karrow_forward
- For a fusion reaction, at which temperature T do you expect the optimal reaction rate to approximately occur? In the expressions below EG is the Gamow energy of the reaction and k is the Boltzmann constant. Select one: O a. T O b. T O c. T O d. T O e. T = = = = = EG 100k 100EG k EG k 10EG k EG 10karrow_forwardA normal family living in a villa has an approximate energy consumption of 20 MWh per year. Now suppose that the family is supplied by energy from a fusion power plants that utilize the energy released from the nuclear reaction We also assume that the power plant has an efficiency of 25%. How many grams of deuterium are needed each year to produce more energy this family?arrow_forwarda) Calculate the energy in joules released by the fusion of a 1.75 -kg mixture of deuterium and tritium, which produces helium. There are equal numbers of deuterium and tritium nuclei in the mixture. b) If this process takes place continuously over a period of a year, what is the average power output in units of megawatts?arrow_forward
- Another series of nuclear reactions that can produce energy in the interior of stars is the cycle described below. This cycle is most efficient when the central temperature in a star is above 1.6 x107 K. Because the temperature at the center of the Sun is only 1.5 x 107 K, the following cycle produces less than 10% of the Sun’s energy. (a) A high - energy proton is absorbed by 12C. Another nucleus, A, is produced in the reaction, along with a gamma ray. Identify nucleus A. (b) Nucleus A decays through positron emission to form nucleus B. Identify nucleus B. (c) Nucleus B absorbs a proton to produce nucleus C and a gamma ray. Identify nucleus C . (d) Nucleus C absorbs a proton to produce nucleus D and a gamma ray. Identify nucleus D. (e) Nucleus D decays through positron emission to produce nucleus E. Identify nucleus E. (f ) Nucleus E absorbs a proton to produce nucleus F plus an alpha particle. What is nucleus F? Note: If nucleus F is not 12C— that is, the nucleus you started with —…arrow_forwardThe fission process in a reactor is represented by the equation below: U235 + n1 = La148+ Br85 + 3n1. If the elements in the above equation have the following atomic mass units (a.m.u ): U235 =235.124, n1 =1.009 La148= 147.96 and Br85 = 84.938. Given that mass of 1 a.m.u =1.67 x 10 -27 kg and 1.619 x 10-19 J = eV. 235g of Uranium contains 6.03 x 1023 atoms. a.Calculate the mass of Uranium atom that will be converted into heat energy by the fission process. b. Calculate the total amount of energy in MeV released during the fission process c.Calculate the amount of energy in J that can be obtained from one kilogramme of Uranium during a fission processarrow_forwardWhat would have to be the reproduction rate in order that a total of 8000 J of energy be released after 60 generations in a chain reaction of fissioning uranium-235 ? O 1.860 O 1.243 O 1.743 O 2.147 None of thesearrow_forward
- Please help. This problem involves finding the amount of deuterium needed to generate a certain amount of energy. Thank you.arrow_forwardIn the following section, at least 2 to up to 5 answers may be correct. Fusion and fission processes can often be viewed as the “reverse” process with respect to each other. Examples are: a. light frequency transformation. b. beta - decay is the inverse process of a proton flipping into a neutron during hydrogen fusion c. helium-capture reactions that form heavy elements inside massive stars are the reverse of α-decay. d. fission of a very heavy element into two lighter elements is the inverse of fusion of two medium-mass elements into heavy elements. e. conservation of photon charge.arrow_forwardSpeculate about some worldwide changes likely to follow the advent of successful fusion reactors. Compare the advantages and disadvantages of electricity coming from a large central power station versus a network of many smaller solar-based stations owned and operated by individuals.arrow_forward
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