Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 30 - Nuclear Physics and Radioactivity - Search and Learn - Page 884: 4

Answer

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Work Step by Step

a. See figure 30–17. The initial force on the rightward-moving particle is down. Apply the right-hand rule. With the magnetic field going into the page, the force on a positively-charged particle would be upward. The particle must be negatively charged. It is $\beta^-$ decay. b. Assume that the particle is not relativistic. Use equation 20-12, r = mv/qB. Solve for the speed. $$v=\frac{qBr}{m}=\frac{(1.60\times10^{-19}C)(0.012T)(0.0047m)}{9.11\times10^{-31}kg}=9.9\times10^6 m/s$$ Indeed, this is a nonrelativistic speed.
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