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Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker
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Cosmic Rays Protons in cosmic rays have been observed with

Chapter 29, Problem 79GP

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QUESTION:

Problem 79GP

Cosmic Rays Protons in cosmic rays have been observed with kinetic energies as large as 1.0 × 1020 eV. (a) How fast are these protons moving? Give your answer as a fraction of the speed of light, (b) Show that the kinetic energy of a single one of these protons is much greater than the kinetic energy of a 15-mg ant walking with a speed of 8.8 mm/s.

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QUESTION:

Problem 79GP

Cosmic Rays Protons in cosmic rays have been observed with kinetic energies as large as 1.0 × 1020 eV. (a) How fast are these protons moving? Give your answer as a fraction of the speed of light, (b) Show that the kinetic energy of a single one of these protons is much greater than the kinetic energy of a 15-mg ant walking with a speed of 8.8 mm/s.

ANSWER:

Step 1 of 3

a)

Here, we have to  find the speed of the protons.

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