Modern Physics
3rd Edition
ISBN: 9781111794378
Author: Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher: Cengage Learning
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Question
Chapter 15.7, Problem 3E
To determine
The threshold energy for the given reactions.
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Part A
Nuclear reactors generate power by harnessing the
energy from nuclear fission. In a fission reaction,
uranium-235 absorbs a neutron, bringing it into a
highly unstable state as uranium-236. This state
almost immediately breaks apart into two smaller
fragments, releasing energy. One typical reaction is
140 Xe +94 Sr + 2,n,
What is the reaction energy Q of this reaction? Use c? = 931.5 MeV/u.
Express your answer in megaelectron volts to three significant figures.
235
92
3%U+n→
• View Available Hint(s)
54
38
where in indicates a neutron. In this problem,
assume that all fission reactions are of this kind. In
Hν ΑΣφ
fact, many different fission reactions go on inside a
reactor, but all have similar reaction energies, so it
is reasonable to calculate with just one. The
products of this reaction are unstable and decay
shortly after fission, releasing more energy. In this
problem, you will ignore the extra energy
contributed by these secondary decays.
Q :
MeV
Submit
You will need the…
Part A
Compute the energy released in the fission reaction
n+ 239 Pu → 137 Xe+ 100 Zr + 3n
Atomic mass of 137 Xe is 136.911562 u, atomic mass of 100 Zr is 99.91776 u, and atomic mass of 239 Pu is 239.052157 u.
Express your answer in megaelectron volts.
ΔΕ
MeV
Submit
Request Answer
I Review | Constants | Periodic Table
In a student lab experiment, 5.8 MeV alpha
particles from the decay of 210P0 are directed at a
piece of thin platinum foil.
Part A
If an alpha particle is directed straight toward the nucleus of a platinum atom, what is the distance
of closest approach?
Express your answer with the appropriate units.
µA
?
Imin =
Value
Units
Chapter 15 Solutions
Modern Physics
Ch. 15.6 - Prob. 2ECh. 15.7 - Prob. 3ECh. 15 - Prob. 1QCh. 15 - Prob. 2QCh. 15 - Prob. 3QCh. 15 - Prob. 4QCh. 15 - Prob. 5QCh. 15 - Prob. 6QCh. 15 - Prob. 7QCh. 15 - Prob. 9Q
Ch. 15 - Prob. 10QCh. 15 - Prob. 11QCh. 15 - Prob. 12QCh. 15 - Prob. 14QCh. 15 - Prob. 15QCh. 15 - Prob. 16QCh. 15 - Prob. 17QCh. 15 - Prob. 18QCh. 15 - Prob. 1PCh. 15 - Prob. 2PCh. 15 - Prob. 3PCh. 15 - Prob. 4PCh. 15 - Prob. 5PCh. 15 - Prob. 6PCh. 15 - Prob. 7PCh. 15 - Prob. 8PCh. 15 - Prob. 9PCh. 15 - Prob. 10PCh. 15 - Prob. 11PCh. 15 - Prob. 12PCh. 15 - Prob. 13PCh. 15 - Prob. 14PCh. 15 - Prob. 15PCh. 15 - Prob. 16PCh. 15 - Prob. 17PCh. 15 - Prob. 18PCh. 15 - Prob. 19PCh. 15 - Prob. 20PCh. 15 - Prob. 21PCh. 15 - Prob. 22PCh. 15 - Prob. 23PCh. 15 - An unstable particle, initially at rest, decays...Ch. 15 - Prob. 25PCh. 15 - Prob. 26PCh. 15 - Prob. 27PCh. 15 - Prob. 28PCh. 15 - Prob. 29PCh. 15 - Prob. 30PCh. 15 - Prob. 31PCh. 15 - Prob. 32PCh. 15 - Prob. 33PCh. 15 - Prob. 34PCh. 15 - Prob. 35PCh. 15 - Prob. 36P
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