Question

The energy equivalent of $1amu$ is

• A. $931eV$
• B. $93.1V$
• C. $931MeV$
• D. $9.31MeV$

Answer 1

The correct option is C $931MeV$

$1amu=1.66\times {10}^{-27}kg$

According to Einstein's mass energy equivalence, $E=m{c}^2$ where $c=$ velocity of light.

So, $E=1.66\times {10}^{-27}\times (3\times {10}^8{)}^2=14.94\times {10}^{-11}J$

$E=\frac{14.94\times {10}^{-11}}{1.6\times {10}^{-19}}eV$ where $1eV=1.6\times {10}^{-19}J$

$E=931\times {10}^{6}eV=931MeV$