Total Energy: a Proton in a Certain Particle Accelerator Has

Multiple Choice

Total energy: A proton in a certain particle accelerator has a kinetic energy that is equal to its rest energy. What is the momentum of the proton as measured by a physicist working with the accelerator? (c = 3.00 × 10⁸ m/s, m_proton = 1.67 × 10^-27 kg)

A) 2.51 × 10^-19 kg ∙ m/s
B) 2.89 × 10^-19 kg ∙ m/s
C) 4.34 × 10^-19 kg ∙ m/s
D) 5.01 × 10^-19 kg ∙ m/s
E) 8.68 × 10^-19 kg ∙ m/s