FUNDAMENTALS OF PHYSICS - EXTENDED
12th Edition
ISBN: 9781119773511
Author: Halliday
Publisher: WILEY
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The lifetime of a free neutron is 886 s. If a neutron moves with a speed of 2.57 ✕ 108 m/s relative to an observer in the lab, what does the observer measure the neutron's lifetime to be (in s)?
The factor γ appears in many relativistic expressions. A value γ = 1.01 implies that relativity changes the Newtonian values by approximately 1% and that relativistic effects can no longer be ignored. At what kinetic energy, in MeV, is γ = 1.01 for (a) an electron, and (b) a proton?
Chapter 37, Problem 049
A cosmic ray proton passes along the left-right width of a page with a relative speed v and total energy 14.35 nJ. According to your measurements, that
left-right width is 20.0 cm. (a) What is the width according to the proton's reference frame? How much time did the passage take according to (b) your
frame and (c) the proton's frame?
(a) Number
Units
2.09E-3
(b) Number 6.66E-10
Units
(c) Number
Units
S
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