A proton has a rest mass of 938 MeV. From this information one can conclude that the rest mass of a proton is A) 5.00 $\times$ 10^-19 kg B) 1.50 $\times$ 10^-10 kg C) 1.67 $\times$ 10^-27 kg D) 1.04 $\times$ 10^-8 kg E) 2.34 $\times$ 10^-29 kg

Question

Quizplus · Accepted Answer

The rest mass of a proton is given as 938 MeV. We know that 1 eV/c^2 = 1.7827 × 10^-36 Kg. Therefore,
Rest mass of proton = 938 MeV/c^2
= 938 × 1.7827 × 10^-36 Kg (since 1 MeV/c^2 = 1.7827 × 10^-30 kg)
= 1.673 x 10^-27 kg
Among the given options, choice C (1.67 × 10^-27 kg) is the closest to the calculated value of the rest mass of a proton. Therefore, the best choice is C.

A Proton Has a Rest Mass of 938 MeV ×\times× 10-19 Kg B) 1

A Proton Has a Rest Mass of 938 MeV $\times$ 10^-19 Kg
B) 1