University Physics Volume 3
17th Edition
ISBN: 9781938168185
Author: William Moebs, Jeff Sanny
Publisher: OpenStax
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Textbook Question
Chapter 11, Problem 31P
How much energy is released when ail electron and a positron at rest annihilate each other? (For particle masses, see Table 11.1.)
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Suppose you are designing a proton decay experiment and you can detect 50 percent of the proton decays in a tank of water. (a) How many kilograms of water would you need to see one decay per month, assuming a lifetime of 1031 y ?
(b) How many cubic meters of water is this?
(c) If the actual lifetime is 1033 y , how long would you have to wait on an average to see a single proton decay?
A proton‑antiproton annihilation takes place, leaving two photons with a combined energy of 2.50 GeV.
Find the kinetic energy Kp of the proton if the proton had the same kinetic energy as the antiproton.
Find the kinetic energy Kp′ of the proton if the proton had 1.25 times as much kinetic energy as the antiproton.
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Chapter 11 Solutions
University Physics Volume 3
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