The pion + has a rest energy of 139.6 MeV and an average lifetime of 2.6

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The pion π+ has a rest energy of 139.6 MeV and an average lifetime of 2.6 × 10-8 s.
(a) What is its mass in kg?
(b) Neglecting the effects of relativity, at what speed will the pion travel 1.0 m during an average lifetime?

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Physics

ISBN: 978-0321976444

5th edition

Authors: James S. Walker

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Question Posted: Aug 31, 2017 02:11 PM

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The pion + has a rest energy of 139.6 MeV and an average lifetime of 2.6

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Use E mc 2 Equation 307 and the relation 1 u 9315 MeVc 2 Equation 323 to ...View the full answer

Physics

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