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5.9 Exercise 47

Avg difficulty 2.5

(a) Calculate the speed of a 1.00-μg1.00 - \mu\text{g} particle of dust that has the same momentum as a proton moving at 0.999c. (b) What does the small speed tell us about the mass of a proton compared to even a tiny amount of macroscopic matter?

OpenStax University Physics Volume 3, 5.9 Relativistic Energy, exercise 47

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Adapted from University Physics Volume 3 © 2016 Rice University. Licensed under CC BY 4.0. Source: University Physics Volume 3. Imported at revision db44eb9.