The rest-mass energy of an electron is

Name: The rest-mass energy of an electron is
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The rest-mass energy of an electron can be calculated using Einstein's equation $E = mc^2$, where $m$ is the rest mass of the electron ($9.1 \times 10^{-31}$ kg) and $c$ is the speed of light ($3.0 \times 10^8$ m/s). When calculated, the rest-mass energy of an electron is approximately $8.2 \times 10^{-14}$ Joules, which corresponds to about 0.511 MeV (mega-electronvolts), not MJ (megajoules) as option D suggests.

The Rest-Mass Energy of an Electron Is A) Zero 9.1×10−31 kg9.1 \times 10 ^ { - 31 } \mathrm {~kg}9.1×10−31 kg

The Rest-Mass Energy of an Electron Is
A) Zero $9.1 \times 10 ^ { - 31 } \mathrm {~kg}$