A Proton Has a Total Energy of 2

Multiple Choice

A proton has a total energy of 2.5 × 10−¹⁰ J. How fast is it moving? (M = 1.67 × 10−²⁷ kg)

A) 0.90 c
B) 0.80 c
C) 0.70 c
D) 0.60 c
E) 0.40 c